Bug 340299 – app-laptop/laptop-mode-tools-1.55-r1: broken AC/battary mode detection (probably kernel bug)

• Status: RESOLVED TEST-REQUEST
• Product: Gentoo Linux

[Description Sergey Mironov 2010-10-09 21:28:21 UTC]

laptop-mode uses /sys/class/power_supply/ACAD/online as first-order source, but it seems to be broken. 

One have to plug-in/plug-out power cable twice to set it to 0. In other words, it misses very first "plug-out" event, so I have a paradox:

# cat /sys/class/power_supply/ACAD/online
1
# cat /sys/class/power_supply/BAT1/status 
Discharging

This is probably a kernel bug, but I don't know where to mail it.

Reproducible: Always

[Comment 1 Sergey Mironov 2010-10-09 21:29:38 UTC]

Created attachment 250055 [details]
My linux-2.6.35-gentoo-r5   .config file.

[Comment 2 Franz Trischberger 2010-12-18 06:29:53 UTC]

I have the same problem. Seems to be a bug in "Future power /sys interface" (Kernel ACPI-config). If you disable this and enable "Deprecated /proc/acpi files
" and "Deprecated power /proc/acpi directories", everything works fine.

For kernel-bugs, there is https://bugzilla.kernel.org/.

[Comment 3 Franz Trischberger 2011-02-10 10:14:49 UTC]

With 2.6.37 (using gentoo-sources) this is fixed, at least for our Lenovo Thinkpad SL510.

[Comment 4 Samuli Suominen (RETIRED) 2012-01-16 19:21:09 UTC]

Try with linux-3.2 and laptop-mode-tools-1.60-r1, reopen if this is still a issue