Bug#585777: Radeon gamma bug, display too bright when using VGA output

[Julien Cristau]

On Sun, Jun 13, 2010 at 16:23:55 -0300, Felipe Augusto van de Wiel (faw) wrote:

> Package: xserver-xorg-video-radeon
> Version: 1:6.13.0-2
> Severity: normal
> Tags: upstream
> 
> On June 13th I upgraded my "squeeze" system and got new kernel
> and new version of xserver-xorg-video-radeon. After the reboot
> my VGA monitor got really bright. I use a monitor attached to
> my laptop's VGA output, extending laptop screen.
> 
> My video card is a RV350 [Mobility Radeon 9600 M10].
> 
> Searching around I found out bug reports at Freedesktop and
> Launchpad:
> 
>   http://bugs.freedesktop.org/show_bug.cgi?id=27478
>   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/548709
> 
> 
> I tried the recommendation of comment 15 on bug 27478 and it
> indeed seem to fix the problem, the command is below.
> 
> radeontool regset DAC_MACRO_CNTL 0x00000808
> 
> 
> I didn't saw something similar on Debian BTS and the bug seems
> rather new (from April/May) but already fixed upstream.  I hope
> this works as a form of documentation for other users (and that
> it could get patched for squeeze).
> 
The patches from upstream bug 27478 were included in 2.6.33.3 as far as
I can tell, so they're in debian kernel 2.6.32-12.

Cheers,
Julien
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