http://bugzilla.kernel.org/show_bug.cgi?id=11682
------- Comment #20 from [EMAIL PROTECTED] 2008-11-27 23:53 -------
(In reply to comment #18)
> how to set it to the maximum power?
It's set to the max by default, after booting
> does poking the /sys/class/backlight/acpi_video{0,1}/brightness change the
> backlight?
> I suggest you update your kernel to the latest kernel release, and you'll see
> only acpi_video0 here, which actually works.
Well, I have up-to-date kernel, just tried 2.6.28-rc6 and only acpi_video0 (I
don't have acpi_video1). I tried playing with acpi_video0:
sony:~ # echo 1 > /sys/class/backlight/acpi_video0/brightness
sony:~ # echo 2 > /sys/class/backlight/acpi_video0/brightness
sony:~ # echo 3 > /sys/class/backlight/acpi_video0/brightness
sony:~ # cat /sys/class/backlight/acpi_video0/brightness
3
sony:~ # cat /sys/class/backlight/acpi_video0/max_brightness
8
sony:~ # cat /sys/class/backlight/acpi_video0/actual_brightness
3
sony:~ # echo 1 > /sys/class/backlight/acpi_video0/actual_brightness
bash: /sys/class/backlight/acpi_video0/actual_brightness: No access
but nothing happens.
Peuc: which kernel did you use?
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