https://bugzilla.kernel.org/show_bug.cgi?id=41042
Jose Alonso <joalon...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEEDINFO |RESOLVED
Resolution| |CODE_FIX
--- Comment #12 from Jose Alonso <joalon...@gmail.com> 2013-03-20 02:55:19 ---
Using the intel driver for changing backlight solves the problem !!!
There are 3 drivers on my laptop to change the backlight:
1) default driver: ACPI Video
/sys/class/backlight/acpi_video0
2) vendor driver: dell_laptop (kernel parameter: acpi_backlight=vendor)
/sys/class/backlight/dell_backlight
3) intel driver - /sys/class/backlight/intel_backlight
The drivers 1 and 2 freeze the laptop. (probably: hardware or BIOS table is
broken)
To use the intel driver, add the Option "Backlight" to xorg.
/etc/X11/xorg.conf.d/00-intel.conf:
Section "Device"
Option "AccelMethod" "uxa"
Option "Backlight" "intel_backlight"
Identifier "Card0"
Driver "intel"
BusID "PCI:0:2:0"
EndSection
for more information about another broken acpi see:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=651741#64
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