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  14  <h1>
  15      <a href="http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen</a>
  16
  17  </h1>
  18
  19 </div>
  20
  21
  22     <h3>Entries from January 2013.</h3>
  23
  24     <div class="entry">
  25       <div class="title">
  26         <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>
  27       </div>
  28       <div class="date">
  29         16th January 2013
  30       </div>
  31       <div class="body">
  32         <p>The <a href="http://wiki.debian.org/AppStreamDebianProposal">DEP-11
  33 proposal to add AppStream information to the Debian archive</a>, is a
  34 proposal to make it possible for a Desktop application to propose to
  35 the user some package to install to gain support for a given MIME
  36 type, font, library etc. that is currently missing.  With such
  37 mechanism in place, it would be possible for the desktop to
  38 automatically propose and install leocad if some LDraw file is
  39 downloaded by the browser.</p>
  40
  41 <p>To get some idea about the current content of the archive, I decided
  42 to write a simple program to extract all .desktop files from the
  43 Debian archive and look up the claimed MIME support there.  The result
  44 can be found on the
  45 <a href="http://ftp.skolelinux.org/pub/AppStreamTest">Skolelinux FTP
  46 site</a>.  Using the collected information, it become possible to
  47 answer the question in the title.  Here are the 20 most supported MIME
  48 types in Debian stable (Squeeze), testing (Wheezy) and unstable (Sid).
  49 The complete list is available from the link above.</p>
  50
  51 <p><strong>Debian Stable:</strong></p>
  52
  53 <pre>
  54   count MIME type
  55   ----- -----------------------
  56      25 audio/mpeg
  57      24 audio/x-mp3
  58      24 application/ogg
  59      23 text/plain
  60      21 image/tiff
  61      20 image/jpeg
  62      20 audio/x-flac
  63      19 image/png
  64      19 image/gif
  65      19 audio/x-wav
  66      19 audio/x-mpegurl
  67      18 image/bmp
  68      18 audio/x-scpls
  69      18 audio/x-mpeg
  70      16 audio/x-musepack
  71      16 application/x-ogg
  72      14 image/x-portable-pixmap
  73      14 image/x-portable-bitmap
  74      13 video/x-ms-asf
  75      13 video/mpeg
  76 </pre>
  77
  78 <p><strong>Debian Testing:</strong></p>
  79
  80 <pre>
  81   count MIME type
  82   ----- -----------------------
  83      21 text/plain
  84      21 audio/x-mp3
  85      21 audio/mpeg
  86      20 application/ogg
  87      19 audio/x-wav
  88      18 image/tiff
  89      18 image/jpeg
  90      18 audio/x-flac
  91      17 image/png
  92      17 image/gif
  93      17 audio/x-mpegurl
  94      16 audio/x-scpls
  95      15 image/bmp
  96      15 audio/x-mpeg
  97      14 application/x-ogg
  98      13 video/x-ms-asf
  99      13 audio/x-musepack
 100      12 video/x-ms-wmv
 101      12 video/x-msvideo
 102      12 video/quicktime
 103 </pre>
 104
 105 <p><strong>Debian Unstable:</strong></p>
 106
 107 <pre>
 108   count MIME type
 109   ----- -----------------------
 110      23 audio/mpeg
 111      22 text/plain
 112      21 audio/x-mp3
 113      21 application/ogg
 114      20 audio/x-wav
 115      19 image/tiff
 116      19 audio/x-flac
 117      18 image/jpeg
 118      17 image/png
 119      17 image/gif
 120      17 audio/x-mpegurl
 121      16 image/bmp
 122      16 audio/x-scpls
 123      16 audio/x-mpeg
 124      14 audio/x-musepack
 125      14 application/x-ogg
 126      13 video/x-ms-asf
 127      13 video/mpeg
 128      13 audio/mp4
 129      12 video/x-ms-wmv
 130 </pre>
 131
 132 <p>I am told that PackageKit can provide an API to access the kind of
 133 information mentioned in DEP-11.  I have not yet had time to look at
 134 it, but hope the PackageKit people in Debian are on top of these
 135 issues.</p>
 136
 137       </div>
 138       <div class="tags">
 139
 140
 141         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>.
 142
 143
 144       </div>
 145     </div>
 146     <div class="padding"></div>
 147
 148     <div class="entry">
 149       <div class="title">
 150         <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>
 151       </div>
 152       <div class="date">
 153         15th January 2013
 154       </div>
 155       <div class="body">
 156         <p>Yesterday, I wrote about the
 157 <a href="http://people.skolelinux.org/pere/blog/Modalias_strings___a_practical_way_to_map__stuff__to_hardware.html">modalias
 158 values provided by the Linux kernel</a> following my hope for
 159 <a href="http://people.skolelinux.org/pere/blog/Lets_make_hardware_dongles_easier_to_use_in_Debian.html">better
 160 dongle support in Debian</a>.  Using this knowledge, I have tested how
 161 modalias values attached to package names can be used to map packages
 162 to hardware.  This allow the system to look up and suggest relevant
 163 packages when I plug in some new hardware into my machine, and replace
 164 discover and discover-data as the database used to map hardware to
 165 packages.</p>
 166
 167 <p>I create a modaliases file with entries like the following,
 168 containing package name, kernel module name (if relevant, otherwise
 169 the package name) and globs matching the relevant hardware
 170 modalias.</p>
 171
 172 <p><blockquote>
 173 Package: package-name
 174 <br>Modaliases: module(modaliasglob, modaliasglob, modaliasglob)</p>
 175 </blockquote></p>
 176
 177 <p>It is fairly trivial to write code to find the relevant packages
 178 for a given modalias value using this file.</p>
 179
 180 <p>An entry like this would suggest the video and picture application
 181 cheese for many USB web cameras (interface bus class 0E01):</p>
 182
 183 <p><blockquote>
 184 Package: cheese
 185 <br>Modaliases: cheese(usb:v*p*d*dc*dsc*dp*ic0Eisc01ip*)</p>
 186 </blockquote></p>
 187
 188 <p>An entry like this would suggest the pcmciautils package when a
 189 CardBus bridge (bus class 0607) PCI device is present:</p>
 190
 191 <p><blockquote>
 192 Package: pcmciautils
 193 <br>Modaliases: pcmciautils(pci:v*d*sv*sd*bc06sc07i*)
 194 </blockquote></p>
 195
 196 <p>An entry like this would suggest the package colorhug-client when
 197 plugging in a ColorHug with USB IDs 04D8:F8DA:</p>
 198
 199 <p><blockquote>
 200 Package: colorhug-client
 201 <br>Modaliases: colorhug-client(usb:v04D8pF8DAd*)</p>
 202 </blockquote></p>
 203
 204 <p>I believe the format is compatible with the format of the Packages
 205 file in the Debian archive.  Ubuntu already uses their Packages file
 206 to store their mappings from packages to hardware.</p>
 207
 208 <p>By adding a XB-Modaliases: header in debian/control, any .deb can
 209 announce the hardware it support in a way my prototype understand.
 210 This allow those publishing packages in an APT source outside the
 211 Debian archive as well as those backporting packages to make sure the
 212 hardware mapping are included in the package meta information.  I've
 213 tested such header in the pymissile package, and its modalias mapping
 214 is working as it should with my prototype.  It even made it to Ubuntu
 215 Raring.</p>
 216
 217 <p>To test if it was possible to look up supported hardware using only
 218 the shell tools available in the Debian installer, I wrote a shell
 219 implementation of the lookup code.  The idea is to create files for
 220 each modalias and let the shell do the matching.  Please check out and
 221 try the
 222 <a href="http://anonscm.debian.org/viewvc/debian-edu/trunk/src/hw-support-handler/hw-support-lookup?view=co">hw-support-lookup</a>
 223 shell script.  It run without any extra dependencies and fetch the
 224 hardware mappings from the Debian archive and the subversion
 225 repository where I currently work on my prototype.</p>
 226
 227 <p>When I use it on a machine with a yubikey inserted, it suggest to
 228 install yubikey-personalization:</p>
 229
 230 <p><blockquote>
 231 % ./hw-support-lookup
 232 <br>yubikey-personalization
 233 <br>%
 234 </blockquote></p>
 235
 236 <p>When I run it on my Thinkpad X40 with a PCMCIA/CardBus slot, it
 237 propose to install the pcmciautils package:</p>
 238
 239 <p><blockquote>
 240 % ./hw-support-lookup
 241 <br>pcmciautils
 242 <br>%
 243 </blockquote></p>
 244
 245 <p>If you know of any hardware-package mapping that should be added to
 246 <a href="http://anonscm.debian.org/viewvc/debian-edu/trunk/src/hw-support-handler/modaliases?view=co">my
 247 database</a>, please tell me about it.</p>
 248
 249 <p>It could be possible to generate several of the mappings between
 250 packages and hardware.  One source would be to look at packages with
 251 kernel modules, ie packages with *.ko files in /lib/modules/, and
 252 extract their modalias information.  Another would be to look at
 253 packages with udev rules, ie packages with files in
 254 /lib/udev/rules.d/, and extract their vendor/model information to
 255 generate a modalias matching rule.  I have not tested any of these to
 256 see if it work.</p>
 257
 258 <p>If you want to help implementing a system to let us propose what
 259 packages to install when new hardware is plugged into a Debian
 260 machine, please send me an email or talk to me on
 261 <a href="irc://irc.debian.org/%23debian-devel">#debian-devel</a>.</p>
 262
 263       </div>
 264       <div class="tags">
 265
 266
 267         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>.
 268
 269
 270       </div>
 271     </div>
 272     <div class="padding"></div>
 273
 274     <div class="entry">
 275       <div class="title">
 276         <a href="http://people.skolelinux.org/pere/blog/Modalias_strings___a_practical_way_to_map__stuff__to_hardware.html">Modalias strings - a practical way to map "stuff" to hardware</a>
 277       </div>
 278       <div class="date">
 279         14th January 2013
 280       </div>
 281       <div class="body">
 282         <p>While looking into how to look up Debian packages based on hardware
 283 information, to find the packages that support a given piece of
 284 hardware, I refreshed my memory regarding modalias values, and decided
 285 to document the details.  Here are my findings so far, also available
 286 in
 287 <a href="http://anonscm.debian.org/viewvc/debian-edu/trunk/src/hw-support-handler/">the
 288 Debian Edu subversion repository</a>:
 289
 290 <p><strong>Modalias decoded</strong></p>
 291
 292 <p>This document try to explain what the different types of modalias
 293 values stands for.  It is in part based on information from
 294 &lt;URL: <a href="https://wiki.archlinux.org/index.php/Modalias">https://wiki.archlinux.org/index.php/Modalias</a> &gt;,
 295 &lt;URL: <a href="http://unix.stackexchange.com/questions/26132/how-to-assign-usb-driver-to-device">http://unix.stackexchange.com/questions/26132/how-to-assign-usb-driver-to-device</a> &gt;,
 296 &lt;URL: <a href="http://code.metager.de/source/history/linux/stable/scripts/mod/file2alias.c">http://code.metager.de/source/history/linux/stable/scripts/mod/file2alias.c</a> &gt; and
 297 &lt;URL: <a href="http://cvs.savannah.gnu.org/viewvc/dmidecode/dmidecode.c?root=dmidecode&view=markup">http://cvs.savannah.gnu.org/viewvc/dmidecode/dmidecode.c?root=dmidecode&view=markup</a> &gt;.
 298
 299 <p>The modalias entries for a given Linux machine can be found using
 300 this shell script:</p>
 301
 302 <pre>
 303 find /sys -name modalias -print0 | xargs -0 cat | sort -u
 304 </pre>
 305
 306 <p>The supported modalias globs for a given kernel module can be found
 307 using modinfo:</p>
 308
 309 <pre>
 310 % /sbin/modinfo psmouse | grep alias:
 311 alias:          serio:ty05pr*id*ex*
 312 alias:          serio:ty01pr*id*ex*
 313 %
 314 </pre>
 315
 316 <p><strong>PCI subtype</strong></p>
 317
 318 <p>A typical PCI entry can look like this.  This is an Intel Host
 319 Bridge memory controller:</p>
 320
 321 <p><blockquote>
 322 pci:v00008086d00002770sv00001028sd000001ADbc06sc00i00
 323 </blockquote></p>
 324
 325 <p>This represent these values:</p>
 326
 327 <pre>
 328  v   00008086  (vendor)
 329  d   00002770  (device)
 330  sv  00001028  (subvendor)
 331  sd  000001AD  (subdevice)
 332  bc  06        (bus class)
 333  sc  00        (bus subclass)
 334  i   00        (interface)
 335 </pre>
 336
 337 <p>The vendor/device values are the same values outputted from 'lspci
 338 -n' as 8086:2770.  The bus class/subclass is also shown by lspci as
 339 0600.  The 0600 class is a host bridge.  Other useful bus values are
 340 0300 (VGA compatible card) and 0200 (Ethernet controller).</p>
 341
 342 <p>Not sure how to figure out the interface value, nor what it
 343 means.</p>
 344
 345 <p><strong>USB subtype</strong></p>
 346
 347 <p>Some typical USB entries can look like this.  This is an internal
 348 USB hub in a laptop:</p>
 349
 350 <p><blockquote>
 351 usb:v1D6Bp0001d0206dc09dsc00dp00ic09isc00ip00
 352 </blockquote></p>
 353
 354 <p>Here is the values included in this alias:</p>
 355
 356 <pre>
 357  v    1D6B  (device vendor)
 358  p    0001  (device product)
 359  d    0206  (bcddevice)
 360  dc     09  (device class)
 361  dsc    00  (device subclass)
 362  dp     00  (device protocol)
 363  ic     09  (interface class)
 364  isc    00  (interface subclass)
 365  ip     00  (interface protocol)
 366 </pre>
 367
 368 <p>The 0900 device class/subclass means hub.  Some times the relevant
 369 class is in the interface class section.  For a simple USB web camera,
 370 these alias entries show up:</p>
 371
 372 <p><blockquote>
 373 usb:v0AC8p3420d5000dcEFdsc02dp01ic01isc01ip00
 374 <br>usb:v0AC8p3420d5000dcEFdsc02dp01ic01isc02ip00
 375 <br>usb:v0AC8p3420d5000dcEFdsc02dp01ic0Eisc01ip00
 376 <br>usb:v0AC8p3420d5000dcEFdsc02dp01ic0Eisc02ip00
 377 </blockquote></p>
 378
 379 <p>Interface class 0E01 is video control, 0E02 is video streaming (aka
 380 camera), 0101 is audio control device and 0102 is audio streaming (aka
 381 microphone).  Thus this is a camera with microphone included.</p>
 382
 383 <p><strong>ACPI subtype</strong></p>
 384
 385 <p>The ACPI type is used for several non-PCI/USB stuff.  This is an IR
 386 receiver in a Thinkpad X40:</p>
 387
 388 <p><blockquote>
 389 acpi:IBM0071:PNP0511:
 390 </blockquote></p>
 391
 392 <p>The values between the colons are IDs.</p>
 393
 394 <p><strong>DMI subtype</strong></p>
 395
 396 <p>The DMI table contain lots of information about the computer case
 397 and model.  This is an entry for a IBM Thinkpad X40, fetched from
 398 /sys/devices/virtual/dmi/id/modalias:</p>
 399
 400 <p><blockquote>
 401 dmi:bvnIBM:bvr1UETB6WW(1.66):bd06/15/2005:svnIBM:pn2371H4G:pvrThinkPadX40:rvnIBM:rn2371H4G:rvrNotAvailable:cvnIBM:ct10:cvrNotAvailable:
 402 </blockquote></p>
 403
 404 <p>The values present are</p>
 405
 406 <pre>
 407  bvn  IBM            (BIOS vendor)
 408  bvr  1UETB6WW(1.66) (BIOS version)
 409  bd   06/15/2005     (BIOS date)
 410  svn  IBM            (system vendor)
 411  pn   2371H4G        (product name)
 412  pvr  ThinkPadX40    (product version)
 413  rvn  IBM            (board vendor)
 414  rn   2371H4G        (board name)
 415  rvr  NotAvailable   (board version)
 416  cvn  IBM            (chassis vendor)
 417  ct   10             (chassis type)
 418  cvr  NotAvailable   (chassis version)
 419 </pre>
 420
 421 <p>The chassis type 10 is Notebook.  Other interesting values can be
 422 found in the dmidecode source:</p>
 423
 424 <pre>
 425   3 Desktop
 426   4 Low Profile Desktop
 427   5 Pizza Box
 428   6 Mini Tower
 429   7 Tower
 430   8 Portable
 431   9 Laptop
 432  10 Notebook
 433  11 Hand Held
 434  12 Docking Station
 435  13 All In One
 436  14 Sub Notebook
 437  15 Space-saving
 438  16 Lunch Box
 439  17 Main Server Chassis
 440  18 Expansion Chassis
 441  19 Sub Chassis
 442  20 Bus Expansion Chassis
 443  21 Peripheral Chassis
 444  22 RAID Chassis
 445  23 Rack Mount Chassis
 446  24 Sealed-case PC
 447  25 Multi-system
 448  26 CompactPCI
 449  27 AdvancedTCA
 450  28 Blade
 451  29 Blade Enclosing
 452 </pre>
 453
 454 <p>The chassis type values are not always accurately set in the DMI
 455 table.  For example my home server is a tower, but the DMI modalias
 456 claim it is a desktop.</p>
 457
 458 <p><strong>SerIO subtype</strong></p>
 459
 460 <p>This type is used for PS/2 mouse plugs.  One example is from my
 461 test machine:</p>
 462
 463 <p><blockquote>
 464 serio:ty01pr00id00ex00
 465 </blockquote></p>
 466
 467 <p>The values present are</p>
 468
 469 <pre>
 470   ty  01  (type)
 471   pr  00  (prototype)
 472   id  00  (id)
 473   ex  00  (extra)
 474 </pre>
 475
 476 <p>This type is supported by the psmouse driver.  I am not sure what
 477 the valid values are.</p>
 478
 479 <p><strong>Other subtypes</strong></p>
 480
 481 <p>There are heaps of other modalias subtypes according to
 482 file2alias.c.  There is the rest of the list from that source: amba,
 483 ap, bcma, ccw, css, eisa, hid, i2c, ieee1394, input, ipack, isapnp,
 484 mdio, of, parisc, pcmcia, platform, scsi, sdio, spi, ssb, vio, virtio,
 485 vmbus, x86cpu and zorro.  I did not spend time documenting all of
 486 these, as they do not seem relevant for my intended use with mapping
 487 hardware to packages when new stuff is inserted during run time.</p>
 488
 489 <p><strong>Looking up kernel modules using modalias values</strong></p>
 490
 491 <p>To check which kernel modules provide support for a given modalias,
 492 one can use the following shell script:</p>
 493
 494 <pre>
 495   for id in $(find /sys -name modalias -print0 | xargs -0 cat | sort -u); do \
 496     echo "$id" ; \
 497     /sbin/modprobe --show-depends "$id"|sed 's/^/  /' ; \
 498   done
 499 </pre>
 500
 501 <p>The output can look like this (only the first few entries as the
 502 list is very long on my test machine):</p>
 503
 504 <pre>
 505   acpi:ACPI0003:
 506     insmod /lib/modules/2.6.32-5-686/kernel/drivers/acpi/ac.ko
 507   acpi:device:
 508   FATAL: Module acpi:device: not found.
 509   acpi:IBM0068:
 510     insmod /lib/modules/2.6.32-5-686/kernel/drivers/char/nvram.ko
 511     insmod /lib/modules/2.6.32-5-686/kernel/drivers/leds/led-class.ko
 512     insmod /lib/modules/2.6.32-5-686/kernel/net/rfkill/rfkill.ko
 513     insmod /lib/modules/2.6.32-5-686/kernel/drivers/platform/x86/thinkpad_acpi.ko
 514   acpi:IBM0071:PNP0511:
 515     insmod /lib/modules/2.6.32-5-686/kernel/lib/crc-ccitt.ko
 516     insmod /lib/modules/2.6.32-5-686/kernel/net/irda/irda.ko
 517     insmod /lib/modules/2.6.32-5-686/kernel/drivers/net/irda/nsc-ircc.ko
 518   [...]
 519 </pre>
 520
 521 <p>If you want to help implementing a system to let us propose what
 522 packages to install when new hardware is plugged into a Debian
 523 machine, please send me an email or talk to me on
 524 <a href="irc://irc.debian.org/%23debian-devel">#debian-devel</a>.</p>
 525
 526 <p><strong>Update 2013-01-15:</strong> Rewrite "cat $(find ...)" to
 527 "find ... -print0 | xargs -0 cat" to make sure it handle directories
 528 in /sys/ with space in them.</p>
 529
 530       </div>
 531       <div class="tags">
 532
 533
 534         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>.
 535
 536
 537       </div>
 538     </div>
 539     <div class="padding"></div>
 540
 541     <div class="entry">
 542       <div class="title">
 543         <a href="http://people.skolelinux.org/pere/blog/Moved_the_pymissile_Debian_packaging_to_collab_maint.html">Moved the pymissile Debian packaging to collab-maint</a>
 544       </div>
 545       <div class="date">
 546         10th January 2013
 547       </div>
 548       <div class="body">
 549         <p>As part of my investigation on how to improve the support in Debian
 550 for hardware dongles, I dug up my old Mark and Spencer USB Rocket
 551 Launcher and updated the Debian package
 552 <a href="http://packages.qa.debian.org/pymissile">pymissile</a> to make
 553 sure udev will fix the device permissions when it is plugged in.  I
 554 also added a "Modaliases" header to test it in the Debian archive and
 555 hopefully make the package be proposed by jockey in Ubuntu when a user
 556 plug in his rocket launcher.  In the process I moved the source to a
 557 git repository under collab-maint, to make it easier for any DD to
 558 contribute.  <a href="http://code.google.com/p/pymissile/">Upstream</a>
 559 is not very active, but the software still work for me even after five
 560 years of relative silence.  The new git repository is not listed in
 561 the uploaded package yet, because I want to test the other changes a
 562 bit more before I upload the new version.  If you want to check out
 563 the new version with a .desktop file included, visit the
 564 <a href="http://anonscm.debian.org/gitweb/?p=collab-maint/pymissile.git">gitweb
 565 view</a> or use "<tt>git clone
 566 git://anonscm.debian.org/collab-maint/pymissile.git</tt>".</p>
 567
 568       </div>
 569       <div class="tags">
 570
 571
 572         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/robot">robot</a>.
 573
 574
 575       </div>
 576     </div>
 577     <div class="padding"></div>
 578
 579     <div class="entry">
 580       <div class="title">
 581         <a href="http://people.skolelinux.org/pere/blog/Lets_make_hardware_dongles_easier_to_use_in_Debian.html">Lets make hardware dongles easier to use in Debian</a>
 582       </div>
 583       <div class="date">
 584          9th January 2013
 585       </div>
 586       <div class="body">
 587         <p>One thing that annoys me with Debian and Linux distributions in
 588 general, is that there is a great package management system with the
 589 ability to automatically install software packages by downloading them
 590 from the distribution mirrors, but no way to get it to automatically
 591 install the packages I need to use the hardware I plug into my
 592 machine.  Even if the package to use it is easily available from the
 593 Linux distribution.  When I plug in a LEGO Mindstorms NXT, it could
 594 suggest to automatically install the python-nxt, nbc and t2n packages
 595 I need to talk to it.  When I plug in a Yubikey, it could propose the
 596 yubikey-personalization package.  The information required to do this
 597 is available, but no-one have pulled all the pieces together.</p>
 598
 599 <p>Some years ago, I proposed to
 600 <a href="http://lists.debian.org/debian-devel/2010/05/msg01206.html">use
 601 the discover subsystem to implement this</a>.  The idea is fairly
 602 simple:
 603
 604 <ul>
 605
 606 <li>Add a desktop entry in /usr/share/autostart/ pointing to a program
 607   starting when a user log in.</li>
 608
 609 <li>Set this program up to listen for kernel events emitted when new
 610   hardware is inserted into the computer.</li>
 611
 612 <li>When new hardware is inserted, look up the hardware ID in a
 613   database mapping to packages, and take note of any non-installed
 614   packages.</li>
 615
 616 <li>Show a message to the user proposing to install the discovered
 617   package, and make it easy to install it.</li>
 618
 619 </ul>
 620
 621 <p>I am not sure what the best way to implement this is, but my
 622 initial idea was to use dbus events to discover new hardware, the
 623 discover database to find packages and
 624 <a href="http://www.packagekit.org/">PackageKit</a> to install
 625 packages.</p>
 626
 627 <p>Yesterday, I found time to try to implement this idea, and the
 628 draft package is now checked into
 629 <a href="http://anonscm.debian.org/viewvc/debian-edu/trunk/src/hw-support-handler/">the
 630 Debian Edu subversion repository</a>.  In the process, I updated the
 631 <a href="http://packages.qa.debian.org/d/discover-data.html">discover-data</a>
 632 package to map the USB ids of LEGO Mindstorms and Yubikey devices to
 633 the relevant packages in Debian, and uploaded a new version
 634 2.2013.01.09 to unstable.  I also discovered that the current
 635 <a href="http://packages.qa.debian.org/d/discover.html">discover</a>
 636 package in Debian no longer discovered any USB devices, because
 637 /proc/bus/usb/devices is no longer present.  I ported it to use
 638 libusb as a fall back option to get it working.  The fixed package
 639 version 2.1.2-6 is now in experimental (didn't upload it to unstable
 640 because of the freeze).</p>
 641
 642 <p>With this prototype in place, I can insert my Yubikey, and get this
 643 desktop notification to show up (only once, the first time it is
 644 inserted):</p>
 645
 646 <p align="center"><img src="http://people.skolelinux.org/pere/blog/images/2013-01-09-hw-autoinstall.png"></p>
 647
 648 <p>For this prototype to be really useful, some way to automatically
 649 install the proposed packages by pressing the "Please install
 650 program(s)" button should to be implemented.</p>
 651
 652 <p>If this idea seem useful to you, and you want to help make it
 653 happen, please help me update the discover-data database with mappings
 654 from hardware to Debian packages.  Check if 'discover-pkginstall -l'
 655 list the package you would like to have installed when a given
 656 hardware device is inserted into your computer, and report bugs using
 657 reportbug if it isn't.  Or, if you know of a better way to provide
 658 such mapping, please let me know.</p>
 659
 660 <p>This prototype need more work, and there are several questions that
 661 should be considered before it is ready for production use.  Is dbus
 662 the correct way to detect new hardware?  At the moment I look for HAL
 663 dbus events on the system bus, because that is the events I could see
 664 on my Debian Squeeze KDE desktop.  Are there better events to use?
 665 How should the user be notified?  Is the desktop notification
 666 mechanism the best option, or should the background daemon raise a
 667 popup instead?  How should packages be installed?  When should they
 668 not be installed?</p>
 669
 670 <p>If you want to help getting such feature implemented in Debian,
 671 please send me an email. :)</p>
 672
 673       </div>
 674       <div class="tags">
 675
 676
 677         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>.
 678
 679
 680       </div>
 681     </div>
 682     <div class="padding"></div>
 683
 684     <div class="entry">
 685       <div class="title">
 686         <a href="http://people.skolelinux.org/pere/blog/New_IRC_channel_for_LEGO_designers_using_Debian.html">New IRC channel for LEGO designers using Debian</a>
 687       </div>
 688       <div class="date">
 689          2nd January 2013
 690       </div>
 691       <div class="body">
 692         <p>During Christmas, I have worked a bit on the Debian support for
 693 <a href="http://mindstorms.lego.com/en-us/Default.aspx">LEGO Mindstorm
 694 NXT</a>.  My son and I have played a bit with my NXT set, and I
 695 discovered I had to build all the tools myself because none were
 696 already in Debian Squeeze.  If Debian support for LEGO is something
 697 you care about, please join me on the IRC channel
 698 <a href="irc://irc.debian.org/%23debian-lego">#debian-lego</a> (server
 699 irc.debian.org).  There is a lot that could be done to improve the
 700 Debian support for LEGO designers.  For example both CAD software
 701 and Mindstorm compilers are missing. :)</p>
 702
 703 <p>Update 2012-01-03: A
 704 <a href="http://wiki.debian.org/LegoDesigners">project page</a>
 705 including links to Lego related packages is now available.</p>
 706
 707       </div>
 708       <div class="tags">
 709
 710
 711         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/robot">robot</a>.
 712
 713
 714       </div>
 715     </div>
 716     <div class="padding"></div>
 717
 718     <div class="entry">
 719       <div class="title">
 720         <a href="http://people.skolelinux.org/pere/blog/Lenker_for_2013_01_01.html">Lenker for 2013-01-01</a>
 721       </div>
 722       <div class="date">
 723          1st January 2013
 724       </div>
 725       <div class="body">
 726         <p>Her er noen lenker til tekster jeg har satt pris på å lese den
 727 siste måneden.</p>
 728
 729 <ul>
 730
 731 <li>2012-12-07
 732   <a href="http://www.idg.no/computerworld/article262047.ece">Myter og
 733   FUD om fri programvare</a> av min venn Christer Gundersen som
 734   kommenterer noen av de påstandene som er spredt via Computerworld
 735   Norge de siste månedene.</li>
 736
 737 <li>BankID er et opplegg der utsteder (dvs. banken eller dens
 738   leverandør) sitter på alt som trengs for å bruke BankID, men har
 739   lovet å ikke bruke den unntatt på oppdrag fra deg.  Det er greit nok
 740   for banktjenester, der banken allerede har full kontroll over
 741   resultatet, men problematisk når det gjelder tilgang til
 742   helseopplysninger og avtaleinngåelse med andre enn banken.  Jeg
 743   håper protestene brer om seg.
 744
 745   <ul>
 746
 747   <li>2012-12-11 <a href="http://www.aftenposten.no/meninger/debatt/BankID-blottlegger-helseopplysninger-7067148.html">BankID
 748     blottlegger helseopplysninger</a></li>
 749
 750   <li>2012-12-07 <a href="http://www.nrk.no/nyheter/norge/1.9695027">-
 751     Helseopplysningene ikke sikre med Bank-ID</a></li>
 752
 753   <li>2012-12-07
 754     <a href="https://www.bankid.no/Presse-og-nyheter/Nyhetsarkiv/2012/Papeker-alvorlige-men-kjente-utfordringer/">Påpeker
 755     alvorlige, men kjente utfordringer</a> er den offisielle
 756     holdningen til de som lager BankID.</li>
 757
 758   <li>2012-12-08
 759     <a href="http://www.tnp.no/norway/panorama/3419-ntnu-researcher-warns-against-security-of-bank-id-password">NTNU
 760       Researcher Warns against Security of Bank ID Password</a>
 761
 762   </ul>
 763
 764 <li>2012-12-11 <a href="http://www.aftenposten.no/nyheter/iriks/Norske-elever-er-darligst-i-Europa-pa-algebra-7066752.html">Norske elever er dårligst i Europa på algebra</a>
 765
 766 <li>2012-12-11
 767   <a href="http://www.aftenposten.no/meninger/debatt/Realfagsdodaren-7067173.html">Realfagsdødaren</a>
 768
 769 <li>2012-12-21
 770   <a href="http://www.bt.no/nyheter/innenriks/112/--Forventningene-er-for-hoye-2816450.html">-
 771   Noen må bli skuffet</a> - Politiet i Bergen forteller hvor lavt de
 772   prioriterer hverdagskriminalitet.</li>
 773
 774 <li>2012-05-03
 775   <a href="http://e24.no/jobb/kripos-ansatt-doemt-for-snoking-for-venn/20208585">
 776   Kripos-ansatt dømt for snoking for venn</A> - viser hvor svak
 777   reaksjonen blir når politiet misbruker innsamlet informasjon.  En
 778   forvarsel på konsekvensene av nasjonal brev- og besøkskontroll -
 779   ofte kalt Datalagringsdirektivet.</li>
 780
 781 <li>2012-12-14
 782   <a href="http://www.dagbladet.no/2012/12/14/kultur/debatt/kronikk/jul/ensomhet/24838541/">Å
 783   smøre en forskjell</a> - om ensomhet og jul.</li>
 784
 785 <li>2012-12-18
 786   <a href="http://www.aftenposten.no/meninger/kronikker/n-krise-av-gangen_-takk-7072452.html">Én
 787   krise av gangen, takk!</a>
 788
 789
 790 <li>2012-12-17
 791   <a href="http://www.aftenposten.no/meninger/NAV-Et-mangehodet-monster--7072165.html">NAV:
 792   Et mangehodet monster</a></li>
 793
 794 <li>2011-01-12
 795   <a href="http://www.dagbladet.no/2011/01/12/kultur/debatt/kronikk/personvern/15027203/">Pasienter
 796   uten vern</a> - forteller litt om hvordan Norsk Pasientregister og
 797   andre helseregister raderer bort pasienters privatsfære.</li>
 798
 799
 800 <li>2012-12-19
 801   <a href="http://www.aftenposten.no/meninger/debatt/Hvorfor-er-barnefamilier-fattige-7073951.html">Hvorfor
 802   er barnefamilier fattige?</a></li>
 803
 804 <li>2012-12-25
 805   <a href="http://www.aftenposten.no/meninger/spaltister/Den-skjulte-minoriteten--konservative-kristne-i-Norge-7075518.html">Den
 806   skjulte minoriteten – konservative kristne i Norge</a> - kronikk av
 807   Bjørn Stærk fra aftenposten</li>
 808
 809 <li>2009-05-04
 810   <a href="http://deltemeninger.no/-/bulletin/show/303429_folkebiblioteket-2-0?ref=checkpoint">Folkebiblioteket
 811   2.0</a> - Min venn Sturle om opphavsrett og Internett, i debatt med
 812   Olav Torvund.</li>
 813
 814 </ul>
 815
 816 <p>Og et godt nytt år til dere alle!</p>
 817
 818       </div>
 819       <div class="tags">
 820
 821
 822         Tags: <a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid</a>, <a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker</a>, <a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk</a>, <a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett</a>, <a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern</a>.
 823
 824
 825       </div>
 826     </div>
 827     <div class="padding"></div>
 828
 829     <p style="text-align: right;"><a href="01.rss"><img src="http://people.skolelinux.org/pere/blog/xml.gif" alt="RSS Feed" width="36" height="14" /></a></p>
 830     <div id="sidebar">
 831
 832
 833
 834 <h2>Archive</h2>
 835 <ul>
 836
 837 <li>2013
 838 <ul>
 839
 840 <li><a href="http://people.skolelinux.org/pere/blog/archive/2013/01/">January (7)</a></li>
 841
 842 </ul></li>
 843
 844 <li>2012
 845 <ul>
 846
 847 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/01/">January (7)</a></li>
 848
 849 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/02/">February (10)</a></li>
 850
 851 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/03/">March (17)</a></li>
 852
 853 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/04/">April (12)</a></li>
 854
 855 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/05/">May (12)</a></li>
 856
 857 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/06/">June (20)</a></li>
 858
 859 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/07/">July (17)</a></li>
 860
 861 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/08/">August (6)</a></li>
 862
 863 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/09/">September (9)</a></li>
 864
 865 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/10/">October (17)</a></li>
 866
 867 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/11/">November (10)</a></li>
 868
 869 <li><a href="http://people.skolelinux.org/pere/blog/archive/2012/12/">December (7)</a></li>
 870
 871 </ul></li>
 872
 873 <li>2011
 874 <ul>
 875
 876 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/01/">January (16)</a></li>
 877
 878 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/02/">February (6)</a></li>
 879
 880 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/03/">March (6)</a></li>
 881
 882 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/04/">April (7)</a></li>
 883
 884 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/05/">May (3)</a></li>
 885
 886 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/06/">June (2)</a></li>
 887
 888 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/07/">July (7)</a></li>
 889
 890 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/08/">August (6)</a></li>
 891
 892 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/09/">September (4)</a></li>
 893
 894 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/10/">October (2)</a></li>
 895
 896 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/11/">November (3)</a></li>
 897
 898 <li><a href="http://people.skolelinux.org/pere/blog/archive/2011/12/">December (1)</a></li>
 899
 900 </ul></li>
 901
 902 <li>2010
 903 <ul>
 904
 905 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/01/">January (2)</a></li>
 906
 907 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/02/">February (1)</a></li>
 908
 909 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/03/">March (3)</a></li>
 910
 911 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/04/">April (3)</a></li>
 912
 913 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/05/">May (9)</a></li>
 914
 915 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/06/">June (14)</a></li>
 916
 917 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/07/">July (12)</a></li>
 918
 919 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/08/">August (13)</a></li>
 920
 921 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/09/">September (7)</a></li>
 922
 923 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/10/">October (9)</a></li>
 924
 925 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/11/">November (13)</a></li>
 926
 927 <li><a href="http://people.skolelinux.org/pere/blog/archive/2010/12/">December (12)</a></li>
 928
 929 </ul></li>
 930
 931 <li>2009
 932 <ul>
 933
 934 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/01/">January (8)</a></li>
 935
 936 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/02/">February (8)</a></li>
 937
 938 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/03/">March (12)</a></li>
 939
 940 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/04/">April (10)</a></li>
 941
 942 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/05/">May (9)</a></li>
 943
 944 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/06/">June (3)</a></li>
 945
 946 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/07/">July (4)</a></li>
 947
 948 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/08/">August (3)</a></li>
 949
 950 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/09/">September (1)</a></li>
 951
 952 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/10/">October (2)</a></li>
 953
 954 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/11/">November (3)</a></li>
 955
 956 <li><a href="http://people.skolelinux.org/pere/blog/archive/2009/12/">December (3)</a></li>
 957
 958 </ul></li>
 959
 960 <li>2008
 961 <ul>
 962
 963 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/11/">November (5)</a></li>
 964
 965 <li><a href="http://people.skolelinux.org/pere/blog/archive/2008/12/">December (7)</a></li>
 966
 967 </ul></li>
 968
 969 </ul>
 970
 971
 972
 973 <h2>Tags</h2>
 974 <ul>
 975
 976  <li><a href="http://people.skolelinux.org/pere/blog/tags/3d-printer">3d-printer (13)</a></li>
 977
 978  <li><a href="http://people.skolelinux.org/pere/blog/tags/amiga">amiga (1)</a></li>
 979
 980  <li><a href="http://people.skolelinux.org/pere/blog/tags/aros">aros (1)</a></li>
 981
 982  <li><a href="http://people.skolelinux.org/pere/blog/tags/bankid">bankid (4)</a></li>
 983
 984  <li><a href="http://people.skolelinux.org/pere/blog/tags/bitcoin">bitcoin (5)</a></li>
 985
 986  <li><a href="http://people.skolelinux.org/pere/blog/tags/bootsystem">bootsystem (12)</a></li>
 987
 988  <li><a href="http://people.skolelinux.org/pere/blog/tags/bsa">bsa (2)</a></li>
 989
 990  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian">debian (65)</a></li>
 991
 992  <li><a href="http://people.skolelinux.org/pere/blog/tags/debian edu">debian edu (118)</a></li>
 993
 994  <li><a href="http://people.skolelinux.org/pere/blog/tags/digistan">digistan (9)</a></li>
 995
 996  <li><a href="http://people.skolelinux.org/pere/blog/tags/docbook">docbook (7)</a></li>
 997
 998  <li><a href="http://people.skolelinux.org/pere/blog/tags/drivstoffpriser">drivstoffpriser (4)</a></li>
 999
1000  <li><a href="http://people.skolelinux.org/pere/blog/tags/english">english (171)</a></li>
1001
1002  <li><a href="http://people.skolelinux.org/pere/blog/tags/fiksgatami">fiksgatami (21)</a></li>
1003
1004  <li><a href="http://people.skolelinux.org/pere/blog/tags/fildeling">fildeling (12)</a></li>
1005
1006  <li><a href="http://people.skolelinux.org/pere/blog/tags/freeculture">freeculture (10)</a></li>
1007
1008  <li><a href="http://people.skolelinux.org/pere/blog/tags/frikanalen">frikanalen (9)</a></li>
1009
1010  <li><a href="http://people.skolelinux.org/pere/blog/tags/intervju">intervju (32)</a></li>
1011
1012  <li><a href="http://people.skolelinux.org/pere/blog/tags/kart">kart (17)</a></li>
1013
1014  <li><a href="http://people.skolelinux.org/pere/blog/tags/ldap">ldap (8)</a></li>
1015
1016  <li><a href="http://people.skolelinux.org/pere/blog/tags/lenker">lenker (6)</a></li>
1017
1018  <li><a href="http://people.skolelinux.org/pere/blog/tags/ltsp">ltsp (1)</a></li>
1019
1020  <li><a href="http://people.skolelinux.org/pere/blog/tags/multimedia">multimedia (25)</a></li>
1021
1022  <li><a href="http://people.skolelinux.org/pere/blog/tags/norsk">norsk (219)</a></li>
1023
1024  <li><a href="http://people.skolelinux.org/pere/blog/tags/nuug">nuug (148)</a></li>
1025
1026  <li><a href="http://people.skolelinux.org/pere/blog/tags/offentlig innsyn">offentlig innsyn (6)</a></li>
1027
1028  <li><a href="http://people.skolelinux.org/pere/blog/tags/open311">open311 (2)</a></li>
1029
1030  <li><a href="http://people.skolelinux.org/pere/blog/tags/opphavsrett">opphavsrett (41)</a></li>
1031
1032  <li><a href="http://people.skolelinux.org/pere/blog/tags/personvern">personvern (61)</a></li>
1033
1034  <li><a href="http://people.skolelinux.org/pere/blog/tags/raid">raid (1)</a></li>
1035
1036  <li><a href="http://people.skolelinux.org/pere/blog/tags/reprap">reprap (11)</a></li>
1037
1038  <li><a href="http://people.skolelinux.org/pere/blog/tags/rfid">rfid (2)</a></li>
1039
1040  <li><a href="http://people.skolelinux.org/pere/blog/tags/robot">robot (6)</a></li>
1041
1042  <li><a href="http://people.skolelinux.org/pere/blog/tags/rss">rss (1)</a></li>
1043
1044  <li><a href="http://people.skolelinux.org/pere/blog/tags/ruter">ruter (4)</a></li>
1045
1046  <li><a href="http://people.skolelinux.org/pere/blog/tags/scraperwiki">scraperwiki (2)</a></li>
1047
1048  <li><a href="http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet (28)</a></li>
1049
1050  <li><a href="http://people.skolelinux.org/pere/blog/tags/sitesummary">sitesummary (4)</a></li>
1051
1052  <li><a href="http://people.skolelinux.org/pere/blog/tags/skepsis">skepsis (4)</a></li>
1053
1054  <li><a href="http://people.skolelinux.org/pere/blog/tags/standard">standard (39)</a></li>
1055
1056  <li><a href="http://people.skolelinux.org/pere/blog/tags/stavekontroll">stavekontroll (3)</a></li>
1057
1058  <li><a href="http://people.skolelinux.org/pere/blog/tags/stortinget">stortinget (5)</a></li>
1059
1060  <li><a href="http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance (12)</a></li>
1061
1062  <li><a href="http://people.skolelinux.org/pere/blog/tags/sysadmin">sysadmin (1)</a></li>
1063
1064  <li><a href="http://people.skolelinux.org/pere/blog/tags/valg">valg (7)</a></li>
1065
1066  <li><a href="http://people.skolelinux.org/pere/blog/tags/video">video (35)</a></li>
1067
1068  <li><a href="http://people.skolelinux.org/pere/blog/tags/vitenskap">vitenskap (4)</a></li>
1069
1070  <li><a href="http://people.skolelinux.org/pere/blog/tags/web">web (26)</a></li>
1071
1072 </ul>
1073
1074
1075     </div>
1076     <p style="text-align: right">
1077  Created by <a href="http://steve.org.uk/Software/chronicle">Chronicle v4.4</a>
1078 </p>
1079
1080   </body>
1081 </html>