http://bugzilla.kernel.org/show_bug.cgi?id=11769
Summary: LCD brightness constantly set back to 100%
Product: ACPI
Version: 2.5
KernelVersion: 2.6.27
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Other
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
Latest working kernel version: 2.6.26.6
Earliest failing kernel version: 2.6.27
Distribution: Arch Linux
Hardware Environment: Gateway MX6961 laptop w/ Intel GMA950 graphics
Software Environment:
Problem Description:
Shortly after boot, the LCD's brightness gets set to 100%. I can set it back
to the desired level using "echo 62 > /proc/acpi/video/VGA/LCD/brightness".
However, there are many actions that will return the brightness to 100%, such
as switching to a console with ctrl+alt+fn, or returning from xorg screen
blanking. Just about anything that changes the monitor's mode is accompanied
by a return to 100% brightness.
Steps to reproduce:
1) Boot computer. Brightness will go to 100%.
2) Set brightness back to desired level using either /proc/acpi/video... or
/sys/class/backlight...
3) Press ctrl+alt+f1. Brightness will return to 100% every time.
4) Leave xorg idle until screen blanks. When the screen is "woken up",
brightness gets set back to 100%.
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