X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/5b6222f93f94e2721e119fb4a477de4a547e89ba..71a260a5bf31a2f9c5677957c1def616336f145b:/blog/archive/2015/09/09.rss diff --git a/blog/archive/2015/09/09.rss b/blog/archive/2015/09/09.rss index 4d3f6ab26e..e4bf25e521 100644 --- a/blog/archive/2015/09/09.rss +++ b/blog/archive/2015/09/09.rss @@ -3,13 +3,13 @@ Petter Reinholdtsen - Entries from September 2015 Entries from September 2015 - http://people.skolelinux.org/pere/blog/ + https://people.skolelinux.org/pere/blog/ The life and death of a laptop battery - http://people.skolelinux.org/pere/blog/The_life_and_death_of_a_laptop_battery.html - http://people.skolelinux.org/pere/blog/The_life_and_death_of_a_laptop_battery.html + https://people.skolelinux.org/pere/blog/The_life_and_death_of_a_laptop_battery.html + https://people.skolelinux.org/pere/blog/The_life_and_death_of_a_laptop_battery.html Thu, 24 Sep 2015 16:00:00 +0200 <p>When I get a new laptop, the battery life time at the start is OK. But this do not last. The last few laptops gave me a feeling that @@ -39,8 +39,8 @@ available in Debian.</p> battery stats ever since. Now my /var/log/hjemmenett-battery-status.log file contain around 115,000 measurements, from the time the battery was working great until now, -when it is unable to charge above 7% of original capasity. My -colletor shell script is quite simple and look like this:</p> +when it is unable to charge above 7% of original capacity. My +collector shell script is quite simple and look like this:</p> <pre> #!/bin/sh @@ -65,7 +65,7 @@ fi log_battery() { # Print complete message in one echo call, to avoid race condition - # when several log processes run in parallell. + # when several log processes run in parallel. msg=$(printf "%s," $(date +%s); \ for f in $files; do \ printf "%s," $(cat $f); \ @@ -100,7 +100,7 @@ timestamp,manufacturer,model_name,technology,serial_number,energy_full,energy_fu </pre> <p>I wrote a small script to create a graph of the charge development -over time. This graph depicted above show the slow death of mylaptop +over time. This graph depicted above show the slow death of my laptop battery.</p> <p>But why is this happening? Why are my laptop batteries always @@ -134,13 +134,21 @@ speed change over time, or if this stay the same. I did not yet try to write a tool to calculate the derivative values of the battery level, but suspect some interesting insights might be learned from those.</p> + +<p>Update 2015-09-24: I got a tip to install the packages +acpi-call-dkms and tlp (unfortunately missing in Debian stable) +packages instead of the tp-smapi-dkms package I had tried to use +initially, and use 'tlp setcharge 40 80' to change when charging start +and stop. I've done so now, but expect my existing battery is toast +and need to be replaced. The proposal is unfortunately Thinkpad +specific.</p> Book cover for the Free Culture book finally done - http://people.skolelinux.org/pere/blog/Book_cover_for_the_Free_Culture_book_finally_done.html - http://people.skolelinux.org/pere/blog/Book_cover_for_the_Free_Culture_book_finally_done.html + https://people.skolelinux.org/pere/blog/Book_cover_for_the_Free_Culture_book_finally_done.html + https://people.skolelinux.org/pere/blog/Book_cover_for_the_Free_Culture_book_finally_done.html Thu, 3 Sep 2015 21:00:00 +0200 <p>Creating a good looking book cover proved harder than I expected. I wanted to create a cover looking similar to the original cover of