http://bugzilla.kernel.org/show_bug.cgi?id=11769
[EMAIL PROTECTED] changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |NEEDINFO
------- Comment #13 from [EMAIL PROTECTED] 2008-10-29 18:51 -------
(In reply to comment #7)
> After booting, the value of /sys/class/backlight/*/brightness is 7 (maximum),
> and the value in /proc/acpi/video/VGA/LCD/brightness is 100. Using the
> brightness functions keys, the brightness of the monitor obviously changes,
> but
> the values in those 2 files remain at maximum.
test1:
kill acpid and run "cat /proc/acpi/event",
what do you get when pressing the hotkey?
test2:
"echo 0 > /sys/module/video/parameters/brightness_switch_enabled"
can you change the backlight via hotkey any more?
Note that the BIOS is tricky.
Method (LBCM, 1, NotSerialized)
{
If (\_OSI ("Windows 2006"))
{
...
}
}
the method for backlight control only works on windows Vista.
i.e. any previous windows releases don't use this method for backlight control.
what if you boot with acpi_osi="!Windows 2006"?
PS, in this case, both the proc and sys backlight I/F may not work for you.
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