https://bugzilla.kernel.org/show_bug.cgi?id=35622
--- Comment #5 from Lee, Chun-Yi <j...@novell.com> 2011-05-23 04:55:37 ---
Found the brightness control by this machine is follow standard acpi video
interface:
Method (_Q11, 0, NotSerialized) /* brightness
decrease */
{
...
If (LGreaterEqual (OSYS, 0x07D6)) /* Vista or
Windows 7 */
{
If (LEqual (OBV, 0xFF))
{
Notify (^^^PEG0.PEGP.DD01, 0x87)
}
Else
{
Notify (^^^GFX0.DD03, 0x87) /*
ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 */
}
}
Method (_BCM, 1, NotSerialized)
{
Divide (Arg0, 0x0A, Local0, Local1)
Decrement (Local1)
Store (Local1, ^^^LPCB.EC0.BRTS)
}
This issue should not related to acer-wmi driver, even acer-wmi driver support
this machine, it cann't help anything for brightness control on this machine.
Did brightness control works before 2.6.39 kernel?
Could you please help to attached dmesg on this bugzilla?
Did you see and error message when you press Fn key to increase/decrease
brightness?
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