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  13  <h1>
  14      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  15
  16  </h1>
  17
  18 </div>
  19
  20
  21
  22     <div class="entry">
  23       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Sleep_until_morning___home_automation_for_the_kids.html">Sleep until morning - home automation for the kids</a></div>
  24       <div class="date">10th February 2013</div>
  25       <div class="body"><p><img align="left" style="margin-right:25px;" src="http://people.skolelinux.org/pere/blog/images/2013-02-10-morning-light.jpeg"></p>
  26
  27 <p>With kids in the house, one challenge is getting them to sleep
  28 during the night and wake up when it is morning.  I mean, when I
  29 believe it is morning, and not two hours earlier.  In our household we
  30 have decided that 07:00 is the turning point, but getting the kids to
  31 sleep until 07:00 is a small challenge every day.  They have adapted
  32 quite well, and rarely wake up at 05:00 any more, but some times wake
  33 up at times like 05:50, 06:15, 06:30 or 06:45, and it is hard to put
  34 the awake one to bed again without disturbing and waking the rest.
  35 And I understand perfectly well that they fail to sleep until 07:00
  36 some times, as there is no way for them to know if it is before or
  37 after the magic moment without coming and asking us parents.</p>
  38
  39 <p>But yesterday I came up with a method to solve this problem.  It
  40 involve home automation.  A few years ago I bought a
  41 <a href="http://www.telldus.se/products/tellstick">Tellstick</a> and RF
  42 switches at the local <a href="http://www.clasohlson.com/">Clas
  43 Ohlson</a> shop, allowing me to control lights and other electrical
  44 gadgets using my Linux server.  When I moved from the old flat to a
  45 small house, I put away all this equipment as most of the lighting in
  46 the house was not using wall sockets and thus not easy to connect to
  47 the gadgets I had.  But recently I bought a
  48 <a href="http://www.telldus.se/products/tellstick_net">Tellstick
  49 Net</a> to be able to read sensor input as well as control power
  50 sockets.  I want to control ovens in the basement to avoid the pipes
  51 to freeze, and monitor the humidity to detect flooding.  The default
  52 setup for Tellstick Net is to be controlled by the vendor web service,
  53 which to me is a security problem, but it is also possible to build
  54 ones own
  55 <a href="http://developer.telldus.com/blog/2012/03/02/help-us-develop-local-access-using-tellstick-net-build-your-own-firmware">firmware
  56 with local access</A> instead of being controlled by a Swedish
  57 company, thanks to the release of the GPL licensed firmware source
  58 code.  I plan to get that running before I let it control anything
  59 important.  But while working on this, one idea to make it easier for
  60 the kids came to me yesterday.  We can set up a night light controlled
  61 by the computer, and turn it automatically on at 07:00.  The kids can
  62 then check the light in the morning to know if they are supposed to
  63 get up or not.  They joined me in setting everything up, and I
  64 repeated the concept several times before bed times to make sure they
  65 remembered to check the light before getting up in the morning.</p>
  66
  67 <p>We tested it this morning, and all the kids stayed in bed until
  68 after 07:00, and every one of them commented on the fact that the
  69 "morning light" was turned on and signalled that the morning had
  70 arrived.  So this look like a success, and I am excited to see how
  71 this develops the next few days. :) I really hope this can allow us
  72 all to sleep a bit longer in the morning.</p>
  73
  74 <p>A nice advantage of this setup is that we can remote control when
  75 to tell the kids to get up.  We do not have to wait until 07:00, and
  76 can also delay it if we want to.</p>
  77 </div>
  78       <div class="tags">
  79
  80
  81         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
  82
  83
  84       </div>
  85     </div>
  86     <div class="padding"></div>
  87
  88     <div class="entry">
  89       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Hva_stemte_hver_stortingsrepresentant_i_voteringene_om_datalagringsdirektivet_.html">Hva stemte hver stortingsrepresentant i voteringene om datalagringsdirektivet?</a></div>
  90       <div class="date"> 9th February 2013</div>
  91       <div class="body"><p>Nytt stortingsvalg er på trappene, og folket får igjen mulighet til
  92 å påvirke sammensetningen i vår lovgivende forsamling.  Da er det
  93 relevant å vite hvilke representanter og partier som har støttet
  94 innføringen av brev- og besøkskontroll av hele den norske
  95 befolkningen, det vil si datalagringsdirektivet.</p>
  96
  97 <p>Hvis du vil vite hva hver enkelt stortingsrepresentant har stemt i
  98 stortingsvoteringene om datalagringsdirektivet, så har nettstedet til
  99 <a href="http://www.holderdeord.no/">Holder De Ord</a> den (så vidt jeg
 100 vet) eneste komplette oversikten på sin temaside om
 101 <a href="http://beta.holderdeord.no/issues/innfore-datalagringsdirektivet">innføringen
 102 av datalagringsdirektivet</a>.  Den har detaljene fra de 11 relevante
 103 forslagene som har vært fremmet så lagt.  De har vært votert over
 104 2011-04-04, 2011-04-11, 2012-06-11, 2012-10-05 og 2012-12-06.</p>
 105
 106 <p>Hvis du lurer på hva som er problemet med datalagringsdirektivet,
 107 anbefaler jeg å lese <a href="http://www.uhuru.biz/?cat=84">artiklene
 108 fra Jon Wessel-Aas</a> om temaet, samt informasjon fra foreningen
 109 <a href="http://www.digitaltpersonvern.no/">Digitalt
 110 Personvern</a>.</p>
 111 </div>
 112       <div class="tags">
 113
 114
 115         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>, <a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern</a>, <a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget</a>, <a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance</a>.
 116
 117
 118       </div>
 119     </div>
 120     <div class="padding"></div>
 121
 122     <div class="entry">
 123       <div class="title"><a href="http://people.skolelinux.org/pere/blog/_kt_overv_kning_applauderes_igjen_av_Arbeiderpartiet__H_yre_og_Fremskrittspartiet.html">Økt overvåkning applauderes igjen av Arbeiderpartiet, Høyre og Fremskrittspartiet</a></div>
 124       <div class="date"> 4th February 2013</div>
 125       <div class="body"><p>Jeg ser med gru at Arbeiderpartiet, Høyre og Fremskrittspartiet
 126 <a href="http://www.aftenposten.no/nyheter/iriks/Positive-til-mer-smuglerovervaking-7110348.html">applauderer
 127 tollvesenets forslag</a> om å øke overvåkningen i Norge nok et hakk.
 128 Det er ikke så rart, da de som uttaler seg jo også har støttet
 129 innføringen av datalagringsdirektivet eller i hvert fall ikke veldig
 130 aktivt har motarbeidet det.  Innføringen av datalagringsdirektivet er
 131 en lovendring som innebærer brev og besøkskontroll for hele
 132 befolkningen.</p>
 133
 134 <p><a href="http://www.stortinget.no/no/Saker-og-publikasjoner/Saker/Sak/?p=48717">Datalagringsdirektivet</a>
 135 har vært oppe til votering i stortinget tre ganger så langt.  Det ble
 136 <a href="http://svartelisten.org/">vedtatt første gang 2011-04-04</a>
 137 og
 138 <a href="https://github.com/holderdeord/hdo-folketingparser/blob/master/data/votering-2011-04-11.xml">andre
 139 gang 2011-04-11</a> (lovendringer voteres to ganger), og forslag om å
 140 stoppe loven ble
 141 <a href="http://www.stortinget.no/no/Saker-og-publikasjoner/Saker/Sak/Voteringsoversikt/?p=53844&dnid=1">nedstemt
 142 2012-12-06</a> (se også
 143 <a href="http://beta.holderdeord.no/issues/innfore-datalagringsdirektivet">oversikt fra Holder De
 144 Ord</a>).</p>
 145
 146 <p>Jan Bøhler i Arbeiderpartiet stemte for å innføre
 147 datalagringsdirektivet i lovverket i første votering, var ikke
 148 tilstede i andre votering og støttet loven i tredje votering.  André
 149 Oktay Dahl i Høyre var ikke til stede i første og andre votering men
 150 støttet loven i tredje votering.  Ulf Leirstein i Fremskrittspartiet
 151 stemte mot loven i første votering men var ikke til stede i andre og
 152 tredje votering.</p>
 153
 154 <p>Hvis du lurer på hva som er problemet med datalagringsdirektivet,
 155 anbefaler jeg å lese <a href="http://www.uhuru.biz/?cat=84">artiklene
 156 fra Jon Wessel-Aas</a> om temaet, samt informasjon fra foreningen
 157 <a href="http://www.digitaltpersonvern.no/">Digitalt
 158 Personvern</a>.</p>
 159
 160 <p><strong>Oppdatering 2013-03-09</strong>: Endret lenke til Holder De
 161 Ord, som har byttet mange lenker i forbindelse med import av
 162 voteringsdata for 2010-2011.</p>
 163 </div>
 164       <div class="tags">
 165
 166
 167         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>, <a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern</a>, <a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance</a>.
 168
 169
 170       </div>
 171     </div>
 172     <div class="padding"></div>
 173
 174     <div class="entry">
 175       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Bitcoin_GUI_now_available_from_Debian_unstable__and_Ubuntu_raring_.html">Bitcoin GUI now available from Debian/unstable (and Ubuntu/raring)</a></div>
 176       <div class="date"> 2nd February 2013</div>
 177       <div class="body"><p>My
 178 <a href="http://people.skolelinux.org/pere/blog/How_to_backport_bitcoin_qt_version_0_7_2_2_to_Debian_Squeeze.html">last
 179 bitcoin related blog post</a> mentioned that the new
 180 <a href="http://packages.qa.debian.org/bitcoin">bitcoin package</a> for
 181 Debian was waiting in NEW.  It was accepted by the Debian ftp-masters
 182 2013-01-19, and have been available in unstable since then.  It was
 183 automatically copied to Ubuntu, and is available in their Raring
 184 version too.</p>
 185
 186 <p>But there is a strange problem with the build that block this new
 187 version from being available on the i386 and kfreebsd-i386
 188 architectures.  For some strange reason, the autobuilders in Debian
 189 for these architectures fail to run the test suite on these
 190 architectures (<a href="http://bugs.debian.org/672524">BTS #672524</a>).
 191 We are so far unable to reproduce it when building it manually, and
 192 no-one have been able to propose a fix.  If you got an idea what is
 193 failing, please let us know via the BTS.</p>
 194
 195 <p>One feature that is annoying me with of the bitcoin client, because
 196 I often run low on disk space, is the fact that the client will exit
 197 if it run short on space (<a href="http://bugs.debian.org/696715">BTS
 198 #696715</a>).  So make sure you have enough disk space when you run
 199 it. :)</p>
 200
 201 <p>As usual, if you use bitcoin and want to show your support of my
 202 activities, please send Bitcoin donations to my address
 203 <b><a href="bitcoin:15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b&label=PetterReinholdtsenBlog">15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b</a></b>.</p>
 204 </div>
 205       <div class="tags">
 206
 207
 208         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin</a>, <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 209
 210
 211       </div>
 212     </div>
 213     <div class="padding"></div>
 214
 215     <div class="entry">
 216       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Welcome_to_the_world__Isenkram_.html">Welcome to the world, Isenkram!</a></div>
 217       <div class="date">22nd January 2013</div>
 218       <div class="body"><p>Yesterday, I
 219 <a href="http://people.skolelinux.org/pere/blog/First_prototype_ready_making_hardware_easier_to_use_in_Debian.html">asked
 220 for testers</a> for my prototype for making Debian better at handling
 221 pluggable hardware devices, which I
 222 <a href="http://people.skolelinux.org/pere/blog/Lets_make_hardware_dongles_easier_to_use_in_Debian.html">set
 223 out to create</a> earlier this month.  Several valuable testers showed
 224 up, and caused me to really want to to open up the development to more
 225 people.  But before I did this, I want to come up with a sensible name
 226 for this project.  Today I finally decided on a new name, and I have
 227 renamed the project from hw-support-handler to this new name.  In the
 228 process, I moved the source to git and made it available as a
 229 <a href="http://anonscm.debian.org/gitweb/?p=collab-maint/isenkram.git">collab-maint</a>
 230 repository in Debian.  The new name?  It is <strong>Isenkram</strong>.
 231 To fetch and build the latest version of the source, use</p>
 232
 233 <pre>
 234 git clone http://anonscm.debian.org/git/collab-maint/isenkram.git
 235 cd isenkram && git-buildpackage -us -uc
 236 </pre>
 237
 238 <p>I have not yet adjusted all files to use the new name yet.  If you
 239 want to hack on the source or improve the package, please go ahead.
 240 But please talk to me first on IRC or via email before you do major
 241 changes, to make sure we do not step on each others toes. :)</p>
 242
 243 <p>If you wonder what 'isenkram' is, it is a Norwegian word for iron
 244 stuff, typically meaning tools, nails, screws, etc.  Typical hardware
 245 stuff, in other words.  I've been told it is the Norwegian variant of
 246 the German word eisenkram, for those that are familiar with that
 247 word.</p>
 248
 249 <p><strong>Update 2013-01-26</strong>: Added -us -us to build
 250 instructions, to avoid confusing people with an error from the signing
 251 process.</p>
 252
 253 <p><strong>Update 2013-01-27</strong>: Switch to HTTP URL for the git
 254 clone argument to avoid the need for authentication.</p>
 255 </div>
 256       <div class="tags">
 257
 258
 259         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram</a>.
 260
 261
 262       </div>
 263     </div>
 264     <div class="padding"></div>
 265
 266     <div class="entry">
 267       <div class="title"><a href="http://people.skolelinux.org/pere/blog/First_prototype_ready_making_hardware_easier_to_use_in_Debian.html">First prototype ready making hardware easier to use in Debian</a></div>
 268       <div class="date">21st January 2013</div>
 269       <div class="body"><p>Early this month I set out to try to
 270 <a href="http://people.skolelinux.org/pere/blog/Lets_make_hardware_dongles_easier_to_use_in_Debian.html">improve
 271 the Debian support for pluggable hardware devices</a>.  Now my
 272 prototype is working, and it is ready for a larger audience.  To test
 273 it, fetch the
 274 <a href="http://anonscm.debian.org/viewvc/debian-edu/trunk/src/hw-support-handler/">source
 275 from the Debian Edu subversion repository</a>, build and install the
 276 package.  You might have to log out and in again activate the
 277 autostart script.</p>
 278
 279 <p>The design is simple:</p>
 280
 281 <ul>
 282
 283 <li>Add desktop entry in /usr/share/autostart/ causing a program
 284 hw-support-handlerd to start when the user log in.</li>
 285
 286 <li>This program listen for kernel events about new hardware (directly
 287 from the kernel like udev does), not using HAL dbus events as I
 288 initially did.</li>
 289
 290 <li>When new hardware is inserted, look up the hardware modalias in
 291 the APT database, a database
 292 <a href="http://anonscm.debian.org/viewvc/debian-edu/trunk/src/hw-support-handler/modaliases?view=markup">available
 293 via HTTP</a> and a database available as part of the package.</li>
 294
 295 <li>If a package is mapped to the hardware in question, the package
 296 isn't installed yet and this is the first time the hardware was
 297 plugged in, show a desktop notification suggesting to install the
 298 package or packages.</li>
 299
 300 <li>If the user click on the 'install package now' button, ask
 301 aptdaemon via the PackageKit API to install the requrired package.</li>
 302
 303 <li>aptdaemon ask for root password or sudo password, and install the
 304 package while showing progress information in a window.</li>
 305
 306 </ul>
 307
 308 <p>I still need to come up with a better name for the system.  Here
 309 are some screen shots showing the prototype in action.  First the
 310 notification, then the password request, and finally the request to
 311 approve all the dependencies.  Sorry for the Norwegian Bokmål GUI.</p>
 312
 313 <p><img src="http://people.skolelinux.org/pere/blog/images/2013-01-21-hw-support-1-notification.png">
 314 <br><img src="http://people.skolelinux.org/pere/blog/images/2013-01-21-hw-support-2-password.png">
 315 <br><img src="http://people.skolelinux.org/pere/blog/images/2013-01-21-hw-support-3-dependencies.png">
 316 <br><img src="http://people.skolelinux.org/pere/blog/images/2013-01-21-hw-support-4-installing.png">
 317 <br><img src="http://people.skolelinux.org/pere/blog/images/2013-01-21-hw-support-5-installing-details.png" width="70%"></p>
 318
 319 <p>The prototype still need to be improved with longer timeouts, but
 320 is already useful.  The database of hardware to package mappings also
 321 need more work.  It is currently compatible with the Ubuntu way of
 322 storing such information in the package control file, but could be
 323 changed to use other formats instead or in addition to the current
 324 method.  I've dropped the use of discover for this mapping, as the
 325 modalias approach is more flexible and easier to use on Linux as long
 326 as the Linux kernel expose its modalias strings directly.</p>
 327
 328 <p><strong>Update 2013-01-21 16:50</strong>: Due to popular demand,
 329 here is the command required to check out and build the source: Use
 330 '<tt>svn checkout
 331 svn://svn.debian.org/debian-edu/trunk/src/hw-support-handler/; cd
 332 hw-support-handler; debuild</tt>'.  If you lack debuild, install the
 333 devscripts package.</p>
 334
 335 <p><strong>Update 2013-01-23 12:00</strong>: The project is now
 336 renamed to Isenkram and the source moved from the Debian Edu
 337 subversion repository to a Debian collab-maint git repository.  See
 338 <a href="http://people.skolelinux.org/pere/blog/Welcome_to_the_world__Isenkram_.html">build
 339 instructions</a> for details.</p>
 340 </div>
 341       <div class="tags">
 342
 343
 344         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram</a>.
 345
 346
 347       </div>
 348     </div>
 349     <div class="padding"></div>
 350
 351     <div class="entry">
 352       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Thank_you_Thinkpad_X41__for_your_long_and_trustworthy_service.html">Thank you Thinkpad X41, for your long and trustworthy service</a></div>
 353       <div class="date">19th January 2013</div>
 354       <div class="body"><p>This Christmas my trusty old laptop died.  It died quietly and
 355 suddenly in bed.  With a quiet whimper, it went completely quiet and
 356 black.  The power button was no longer able to turn it on.  It was a
 357 IBM Thinkpad X41, and the best laptop I ever had.  Better than both
 358 Thinkpads X30, X31, X40, X60, X61 and X61S.  Far better than the
 359 Compaq I had before that.  Now I need to find a replacement.  To keep
 360 going during Christmas, I moved the one year old SSD disk to my old
 361 X40 where it fitted (only one I had left that could use it), but it is
 362 not a durable solution.
 363
 364 <p>My laptop needs are fairly modest.  This is my wishlist from when I
 365 got a new one more than 10 years ago.  It still holds true.:)</p>
 366
 367 <ul>
 368
 369 <li>Lightweight (around 1 kg) and small volume (preferably smaller
 370   than A4).</li>
 371 <li>Robust, it will be in my backpack every day.</li>
 372 <li>Three button mouse and a mouse pin instead of touch pad.</li>
 373 <li>Long battery life time.  Preferable a week.</li>
 374 <li>Internal WIFI network card.</li>
 375 <li>Internal Twisted Pair network card.</li>
 376 <li>Some USB slots (2-3 is plenty)</li>
 377 <li>Good keyboard - similar to the Thinkpad.</li>
 378 <li>Video resolution at least 1024x768, with size around 12" (A4 paper
 379 size).</li>
 380 <li>Hardware supported by Debian Stable, ie the default kernel and
 381   X.org packages.</li>
 382 <li>Quiet, preferably fan free (or at least not using the fan most of
 383   the time).
 384
 385 </ul>
 386
 387 <p>You will notice that there are no RAM and CPU requirements in the
 388 list.  The reason is simply that the specifications on laptops the
 389 last 10-15 years have been sufficient for my needs, and I have to look
 390 at other features to choose my laptop.  But are there still made as
 391 robust laptops as my X41?  The Thinkpad X60/X61 proved to be less
 392 robust, and Thinkpads seem to be heading in the wrong direction since
 393 Lenovo took over.  But I've been told that X220 and X1 Carbon might
 394 still be useful.</p>
 395
 396 <p>Perhaps I should rethink my needs, and look for a pad with an
 397 external keyboard?  I'll have to check the
 398 <a href="http://www.linux-laptop.net/">Linux Laptops site</a> for
 399 well-supported laptops, or perhaps just buy one preinstalled from one
 400 of the vendors listed on the <a href="http://linuxpreloaded.com/">Linux
 401 Pre-loaded site</a>.</p>
 402 </div>
 403       <div class="tags">
 404
 405
 406         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 407
 408
 409       </div>
 410     </div>
 411     <div class="padding"></div>
 412
 413     <div class="entry">
 414       <div class="title"><a href="http://people.skolelinux.org/pere/blog/How_to_find_a_browser_plugin_supporting_a_given_MIME_type.html">How to find a browser plugin supporting a given MIME type</a></div>
 415       <div class="date">18th January 2013</div>
 416       <div class="body"><p>Some times I try to figure out which Iceweasel browser plugin to
 417 install to get support for a given MIME type.  Thanks to
 418 <a href="https://wiki.ubuntu.com/MozillaTeam/Plugins">specifications
 419 done by Ubuntu</a> and Mozilla, it is possible to do this in Debian.
 420 Unfortunately, not very many packages provide the needed meta
 421 information, Anyway, here is a small script to look up all browser
 422 plugin packages announcing ther MIME support using this specification:</p>
 423
 424 <pre>
 425 #!/usr/bin/python
 426 import sys
 427 import apt
 428 def pkgs_handling_mimetype(mimetype):
 429     cache = apt.Cache()
 430     cache.open(None)
 431     thepkgs = []
 432     for pkg in cache:
 433         version = pkg.candidate
 434         if version is None:
 435             version = pkg.installed
 436         if version is None:
 437             continue
 438         record = version.record
 439         if not record.has_key('Npp-MimeType'):
 440             continue
 441         mime_types = record['Npp-MimeType'].split(',')
 442         for t in mime_types:
 443             t = t.rstrip().strip()
 444             if t == mimetype:
 445                 thepkgs.append(pkg.name)
 446     return thepkgs
 447 mimetype = "audio/ogg"
 448 if 1 < len(sys.argv):
 449     mimetype = sys.argv[1]
 450 print "Browser plugin packages supporting %s:" % mimetype
 451 for pkg in pkgs_handling_mimetype(mimetype):
 452     print "  %s" %pkg
 453 </pre>
 454
 455 <p>It can be used like this to look up a given MIME type:</p>
 456
 457 <pre>
 458 % ./apt-find-browserplug-for-mimetype
 459 Browser plugin packages supporting audio/ogg:
 460   gecko-mediaplayer
 461 % ./apt-find-browserplug-for-mimetype application/x-shockwave-flash
 462 Browser plugin packages supporting application/x-shockwave-flash:
 463   browser-plugin-gnash
 464 %
 465 </pre>
 466
 467 <p>In Ubuntu this mechanism is combined with support in the browser
 468 itself to query for plugins and propose to install the needed
 469 packages.  It would be great if Debian supported such feature too.  Is
 470 anyone working on adding it?</p>
 471
 472 <p><strong>Update 2013-01-18 14:20</strong>: The Debian BTS
 473 request for icweasel support for this feature is
 474 <a href="http://bugs.debian.org/484010">#484010</a> from 2008 (and
 475 <a href="http://bugs.debian.org/698426">#698426</a> from today).  Lack
 476 of manpower and wish for a different design is the reason thus feature
 477 is not yet in iceweasel from Debian.</p>
 478 </div>
 479       <div class="tags">
 480
 481
 482         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 483
 484
 485       </div>
 486     </div>
 487     <div class="padding"></div>
 488
 489     <div class="entry">
 490       <div class="title"><a href="http://people.skolelinux.org/pere/blog/What_is_the_most_supported_MIME_type_in_Debian_.html">What is the most supported MIME type in Debian?</a></div>
 491       <div class="date">16th January 2013</div>
 492       <div class="body"><p>The <a href="http://wiki.debian.org/AppStreamDebianProposal">DEP-11
 493 proposal to add AppStream information to the Debian archive</a>, is a
 494 proposal to make it possible for a Desktop application to propose to
 495 the user some package to install to gain support for a given MIME
 496 type, font, library etc. that is currently missing.  With such
 497 mechanism in place, it would be possible for the desktop to
 498 automatically propose and install leocad if some LDraw file is
 499 downloaded by the browser.</p>
 500
 501 <p>To get some idea about the current content of the archive, I decided
 502 to write a simple program to extract all .desktop files from the
 503 Debian archive and look up the claimed MIME support there.  The result
 504 can be found on the
 505 <a href="http://ftp.skolelinux.org/pub/AppStreamTest">Skolelinux FTP
 506 site</a>.  Using the collected information, it become possible to
 507 answer the question in the title.  Here are the 20 most supported MIME
 508 types in Debian stable (Squeeze), testing (Wheezy) and unstable (Sid).
 509 The complete list is available from the link above.</p>
 510
 511 <p><strong>Debian Stable:</strong></p>
 512
 513 <pre>
 514   count MIME type
 515   ----- -----------------------
 516      32 text/plain
 517      30 audio/mpeg
 518      29 image/png
 519      28 image/jpeg
 520      27 application/ogg
 521      26 audio/x-mp3
 522      25 image/tiff
 523      25 image/gif
 524      22 image/bmp
 525      22 audio/x-wav
 526      20 audio/x-flac
 527      19 audio/x-mpegurl
 528      18 video/x-ms-asf
 529      18 audio/x-musepack
 530      18 audio/x-mpeg
 531      18 application/x-ogg
 532      17 video/mpeg
 533      17 audio/x-scpls
 534      17 audio/ogg
 535      16 video/x-ms-wmv
 536 </pre>
 537
 538 <p><strong>Debian Testing:</strong></p>
 539
 540 <pre>
 541   count MIME type
 542   ----- -----------------------
 543      33 text/plain
 544      32 image/png
 545      32 image/jpeg
 546      29 audio/mpeg
 547      27 image/gif
 548      26 image/tiff
 549      26 application/ogg
 550      25 audio/x-mp3
 551      22 image/bmp
 552      21 audio/x-wav
 553      19 audio/x-mpegurl
 554      19 audio/x-mpeg
 555      18 video/mpeg
 556      18 audio/x-scpls
 557      18 audio/x-flac
 558      18 application/x-ogg
 559      17 video/x-ms-asf
 560      17 text/html
 561      17 audio/x-musepack
 562      16 image/x-xbitmap
 563 </pre>
 564
 565 <p><strong>Debian Unstable:</strong></p>
 566
 567 <pre>
 568   count MIME type
 569   ----- -----------------------
 570      31 text/plain
 571      31 image/png
 572      31 image/jpeg
 573      29 audio/mpeg
 574      28 application/ogg
 575      27 image/gif
 576      26 image/tiff
 577      26 audio/x-mp3
 578      23 audio/x-wav
 579      22 image/bmp
 580      21 audio/x-flac
 581      20 audio/x-mpegurl
 582      19 audio/x-mpeg
 583      18 video/x-ms-asf
 584      18 video/mpeg
 585      18 audio/x-scpls
 586      18 application/x-ogg
 587      17 audio/x-musepack
 588      16 video/x-ms-wmv
 589      16 video/x-msvideo
 590 </pre>
 591
 592 <p>I am told that PackageKit can provide an API to access the kind of
 593 information mentioned in DEP-11.  I have not yet had time to look at
 594 it, but hope the PackageKit people in Debian are on top of these
 595 issues.</p>
 596
 597 <p><strong>Update 2013-01-16 13:35</strong>: Updated numbers after
 598 discovering a typo in my script.</p>
 599 </div>
 600       <div class="tags">
 601
 602
 603         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>.
 604
 605
 606       </div>
 607     </div>
 608     <div class="padding"></div>
 609
 610     <div class="entry">
 611       <div class="title"><a href="http://people.skolelinux.org/pere/blog/Using_modalias_info_to_find_packages_handling_my_hardware.html">Using modalias info to find packages handling my hardware</a></div>
 612       <div class="date">15th January 2013</div>
 613       <div class="body"><p>Yesterday, I wrote about the
 614 <a href="http://people.skolelinux.org/pere/blog/Modalias_strings___a_practical_way_to_map__stuff__to_hardware.html">modalias
 615 values provided by the Linux kernel</a> following my hope for
 616 <a href="http://people.skolelinux.org/pere/blog/Lets_make_hardware_dongles_easier_to_use_in_Debian.html">better
 617 dongle support in Debian</a>.  Using this knowledge, I have tested how
 618 modalias values attached to package names can be used to map packages
 619 to hardware.  This allow the system to look up and suggest relevant
 620 packages when I plug in some new hardware into my machine, and replace
 621 discover and discover-data as the database used to map hardware to
 622 packages.</p>
 623
 624 <p>I create a modaliases file with entries like the following,
 625 containing package name, kernel module name (if relevant, otherwise
 626 the package name) and globs matching the relevant hardware
 627 modalias.</p>
 628
 629 <p><blockquote>
 630 Package: package-name
 631 <br>Modaliases: module(modaliasglob, modaliasglob, modaliasglob)</p>
 632 </blockquote></p>
 633
 634 <p>It is fairly trivial to write code to find the relevant packages
 635 for a given modalias value using this file.</p>
 636
 637 <p>An entry like this would suggest the video and picture application
 638 cheese for many USB web cameras (interface bus class 0E01):</p>
 639
 640 <p><blockquote>
 641 Package: cheese
 642 <br>Modaliases: cheese(usb:v*p*d*dc*dsc*dp*ic0Eisc01ip*)</p>
 643 </blockquote></p>
 644
 645 <p>An entry like this would suggest the pcmciautils package when a
 646 CardBus bridge (bus class 0607) PCI device is present:</p>
 647
 648 <p><blockquote>
 649 Package: pcmciautils
 650 <br>Modaliases: pcmciautils(pci:v*d*sv*sd*bc06sc07i*)
 651 </blockquote></p>
 652
 653 <p>An entry like this would suggest the package colorhug-client when
 654 plugging in a ColorHug with USB IDs 04D8:F8DA:</p>
 655
 656 <p><blockquote>
 657 Package: colorhug-client
 658 <br>Modaliases: colorhug-client(usb:v04D8pF8DAd*)</p>
 659 </blockquote></p>
 660
 661 <p>I believe the format is compatible with the format of the Packages
 662 file in the Debian archive.  Ubuntu already uses their Packages file
 663 to store their mappings from packages to hardware.</p>
 664
 665 <p>By adding a XB-Modaliases: header in debian/control, any .deb can
 666 announce the hardware it support in a way my prototype understand.
 667 This allow those publishing packages in an APT source outside the
 668 Debian archive as well as those backporting packages to make sure the
 669 hardware mapping are included in the package meta information.  I've
 670 tested such header in the pymissile package, and its modalias mapping
 671 is working as it should with my prototype.  It even made it to Ubuntu
 672 Raring.</p>
 673
 674 <p>To test if it was possible to look up supported hardware using only
 675 the shell tools available in the Debian installer, I wrote a shell
 676 implementation of the lookup code.  The idea is to create files for
 677 each modalias and let the shell do the matching.  Please check out and
 678 try the
 679 <a href="http://anonscm.debian.org/viewvc/debian-edu/trunk/src/hw-support-handler/hw-support-lookup?view=co">hw-support-lookup</a>
 680 shell script.  It run without any extra dependencies and fetch the
 681 hardware mappings from the Debian archive and the subversion
 682 repository where I currently work on my prototype.</p>
 683
 684 <p>When I use it on a machine with a yubikey inserted, it suggest to
 685 install yubikey-personalization:</p>
 686
 687 <p><blockquote>
 688 % ./hw-support-lookup
 689 <br>yubikey-personalization
 690 <br>%
 691 </blockquote></p>
 692
 693 <p>When I run it on my Thinkpad X40 with a PCMCIA/CardBus slot, it
 694 propose to install the pcmciautils package:</p>
 695
 696 <p><blockquote>
 697 % ./hw-support-lookup
 698 <br>pcmciautils
 699 <br>%
 700 </blockquote></p>
 701
 702 <p>If you know of any hardware-package mapping that should be added to
 703 <a href="http://anonscm.debian.org/viewvc/debian-edu/trunk/src/hw-support-handler/modaliases?view=co">my
 704 database</a>, please tell me about it.</p>
 705
 706 <p>It could be possible to generate several of the mappings between
 707 packages and hardware.  One source would be to look at packages with
 708 kernel modules, ie packages with *.ko files in /lib/modules/, and
 709 extract their modalias information.  Another would be to look at
 710 packages with udev rules, ie packages with files in
 711 /lib/udev/rules.d/, and extract their vendor/model information to
 712 generate a modalias matching rule.  I have not tested any of these to
 713 see if it work.</p>
 714
 715 <p>If you want to help implementing a system to let us propose what
 716 packages to install when new hardware is plugged into a Debian
 717 machine, please send me an email or talk to me on
 718 <a href="irc://irc.debian.org/%23debian-devel">#debian-devel</a>.</p>
 719 </div>
 720       <div class="tags">
 721
 722
 723         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram</a>.
 724
 725
 726       </div>
 727     </div>
 728     <div class="padding"></div>
 729
 730     <p style="text-align: right;"><a href="index.rss"><img src="http://people.skolelinux.org/pere/blog/xml.gif" alt="RSS feed" width="36" height="14" /></a></p>
 731     <div id="sidebar">
 732
 733
 734
 735 <h2>Archive</h2>
 736 <ul>
 737
 738 <li>2013
 739 <ul>
 740
 741 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (11)</a></li>
 742
 743 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/02/">February (4)</a></li>
 744
 745 </ul></li>
 746
 747 <li>2012
 748 <ul>
 749
 750 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 751
 752 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 753
 754 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 755
 756 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 757
 758 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 759
 760 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 761
 762 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 763
 764 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 765
 766 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 767
 768 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 769
 770 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 771
 772 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 773
 774 </ul></li>
 775
 776 <li>2011
 777 <ul>
 778
 779 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 780
 781 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 782
 783 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 784
 785 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 786
 787 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 788
 789 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 790
 791 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 792
 793 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 794
 795 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 796
 797 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 798
 799 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 800
 801 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 802
 803 </ul></li>
 804
 805 <li>2010
 806 <ul>
 807
 808 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 809
 810 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 811
 812 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 813
 814 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 815
 816 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 817
 818 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 819
 820 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 821
 822 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 823
 824 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 825
 826 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 827
 828 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 829
 830 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 831
 832 </ul></li>
 833
 834 <li>2009
 835 <ul>
 836
 837 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 838
 839 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 840
 841 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 842
 843 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 844
 845 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 846
 847 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 848
 849 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 850
 851 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 852
 853 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 854
 855 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 856
 857 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 858
 859 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 860
 861 </ul></li>
 862
 863 <li>2008
 864 <ul>
 865
 866 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 867
 868 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 869
 870 </ul></li>
 871
 872 </ul>
 873
 874
 875
 876 <h2>Tags</h2>
 877 <ul>
 878
 879  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (13)</a></li>
 880
 881  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 882
 883  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 884
 885  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 886
 887  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (6)</a></li>
 888
 889  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (12)</a></li>
 890
 891  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 892
 893  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (70)</a></li>
 894
 895  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (118)</a></li>
 896
 897  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (9)</a></li>
 898
 899  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (7)</a></li>
 900
 901  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 902
 903  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (177)</a></li>
 904
 905  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (21)</a></li>
 906
 907  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
 908
 909  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (10)</a></li>
 910
 911  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (9)</a></li>
 912
 913  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (32)</a></li>
 914
 915  <li><a href="http://people.skolelinux.org/pere/blog/tags/isenkram">isenkram (5)</a></li>
 916
 917  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (17)</a></li>
 918
 919  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (8)</a></li>
 920
 921  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (6)</a></li>
 922
 923  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
 924
 925  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (25)</a></li>
 926
 927  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (221)</a></li>
 928
 929  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (148)</a></li>
 930
 931  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (6)</a></li>
 932
 933  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
 934
 935  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (41)</a></li>
 936
 937  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (63)</a></li>
 938
 939  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (1)</a></li>
 940
 941  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
 942
 943  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (2)</a></li>
 944
 945  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (6)</a></li>
 946
 947  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
 948
 949  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (4)</a></li>
 950
 951  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
 952
 953  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (28)</a></li>
 954
 955  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
 956
 957  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (4)</a></li>
 958
 959  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (39)</a></li>
 960
 961  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (3)</a></li>
 962
 963  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (6)</a></li>
 964
 965  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (14)</a></li>
 966
 967  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (1)</a></li>
 968
 969  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (7)</a></li>
 970
 971  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (35)</a></li>
 972
 973  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
 974
 975  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (26)</a></li>
 976
 977 </ul>
 978
 979
 980     </div>
 981     <p style="text-align: right">
 982  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.6</a>
 983 </p>
 984
 985   </body>
 986 </html>