Bug#452894: Brightness is reduced when switching to a VT, using 3d games or switching resolution

["Diego Escalante Urrelo" <dieguito@gmail.com>]

On 12/1/07, Brice Goglin <Brice.Goglin@ens-lyon.org> wrote:
> Diego Escalante Urrelo wrote:
> > After rebooting a few times, I have noted that it doesn't matter that
> > thinkpad-acpi is loaded.
> >
>
> Hum, surprising. Do you have any other kernel module like this one loaded?
> IIRC, thinkpad-acpi was ibm-acpi in earlier kernels.
>
> > I tried the command again after confirming the problem was happening
> > on my current session, any of the arguments (legacy, combination,
> > kernel, native) solved the problem.
> >
>
> Any of them? But one of them should be enabled by default on X startup.
>
> What does
>     xrandr --prop
> report after startup?
> Is it different if thinkpad-acpi is loaded or not?
>

I just got the bug again, here's the output:

diego@milkyway:~$    xrandr --prop
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 1024 x 1024
VGA disconnected (normal left inverted right x axis y axis)
LVDS connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
        BACKLIGHT_CONTROL: kernel
                supported: native       legacy       combination  kernel
        BACKLIGHT: 5 (0x00000005) range:  (0,7)
   1024x768       59.3 +   85.0     75.0*    70.1     60.0
   832x624        74.6
   800x600        85.1     72.2     75.0     60.3     56.2
   640x480        85.0     72.8     75.0     59.9
   720x400        85.0
   640x400        85.1
   640x350        85.1