Re: [intel/acpi] backlight

[Yves-Alexis Perez <corsac@corsac.net>]

On Mon, Dec 01, 2008 at 09:08:35AM +0800, Zhao Yakui wrote:
> On Fri, 2008-11-28 at 14:47 +0800, Yves-Alexis Perez wrote:
> > Hi,
> > 
> > I'm running linux 2.6.28-rc6-00007-ged31348 on my Thinkpad T61, with
> > Intel GM965. Under X, brightness keys work fine most of the time, but in
> > some case it fails (for example after a dpms force off, but not always).
> > Switching to console and back to X fix the problem for a time.
> Will you please confirm whether the issue still exists if DPMS is not
> used?

I've disabled DPMS in xorg.conf (setting all times to 0) and will report
back. But basically I think it was broken only after a DPMS event.
> > 
> > Another weird stuff is that, in single user, I have no way to control
> > the backlight. Using brightness key doesn't work,
> > and /sys/class/backlight/acpi_video0 doesn't do anything.
> Can you confirm whether the i915 driver is loaded in single user mode?

It's not

> If not, please load it and see whether the interface
> of /sys/class/backlight/* can work.

When loading it, I still only have acpi_video0 (which is good, at least
I don't have two devices), but it doesnt work. Echoing stuff in
brightness changes the value inside, and in actual_brightness, but the
screen doesn't dim.

This is using 2.6.28-rc6-00184-gd9d060a

Cheers,
-- 
Yves-Alexis