Re: Check for ACPI backlight support otherwise use vendor ACPIdrivers - version 4

Zhang Rui
2008-08-04T01:18:49Z

On Sat, 2008-08-02 at 07:20 +0800, Yves-Alexis Perez wrote:
> On ven, 2008-08-01 at 17:37 +0200, Thomas Renninger wrote:
> > Please queue for 2.6.28.
> > Tell me if parts do not patch and I can repost them against
> > whatever is needed.
> >
> > Ideally they should go in together with Matthew's/Hong's IGD
> > patches (which should come mainline through the dri tree), these
> > patches should need mine.
>
> Ok, as those patches were merged in linux-acpi-2.6/test I managed to
> build and test (0d0b6e44c2d3295b790ecfd20d2461181e10c846).
>
> I'm using a Thinkpad T61 with Intel graphics. Config is attached.
>
> When booting in single user, without acpid, hal, dbus etc. running,
> brightness keys doesn't work. thinkpad-acpi and video are loaded, I
> tried to boot with acpi_backlight=video just to be sure, but nothing
> changes. I have only one device in /sys/class/backlight (acpi_video0).
> brightness and actual_brightness follow the changes when I press the
> brigthness keys, but the real brightness doesnt.

I think you're using the laptop that this patch does break.
Please try acpi_backlight=vendor.

thanks,
rui