[ltp] Workarounds and tips for thinkpads running 2.6.23/2.6.24

[Yves-Alexis Perez]

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On ven, 2008-02-01 at 11:02 -0200, Henrique de Moraes Holschuh wrote:
> 5. Brightness keys *do* work, but there is a major mess about who
> handles
> them, and usually this means they won't do the right thing
> out-of-the-box.
> Your best bet is to use the video ACPI module, *and* map these keys in
> userspace to call xbacklight or xrandr when running a new-enough X
> server
> (which will block the BIOS calls used by thinkpad-acpi and ACPI video
> to
> change the brightness).

btw, using xbacklight to control the brightness, I can notice that,
using =E2=80=9Ckernel=E2=80=9D interface in xrandr (the default one here), =
I can set
brightness to some quite bright maximum, but can't shutdown the display.
Using =E2=80=9Cnative=E2=80=9D interface, I can shutdown the panel but the =
maximum
backlight is a lot less bright than in =E2=80=9Ckernel=E2=80=9D. I guess I =
should use
=E2=80=9Ckernel=E2=80=9D (so acpi is aware of those changes) but it'd be ni=
ce if it
could shutdown the screen too.

I guess there will be some progress on this for 2.6.25-rc1 video.c and
the next thinkpad-acpi.

Thanks for the work,
--=20
Yves-Alexis

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