Bug#348082: xserver-xorg: [ati/radeon] pinkness and interference pattern on Radeon RV250 If [Radeon 9000] rev 1 and TMDS-connected Samsung SyncMaster 213T

[Branden Robinson]

A bit more info:

On Thu, Aug 30, 2007 at 08:16:04PM -0400, Alex Deucher wrote:
> > http://redwald.deadbeast.net/tmp/branden_grief_4.jpeg
> > http://redwald.deadbeast.net/tmp/branden_grief_5.jpeg
> >
> > I'll call that new problem #1: this looks like actual framebuffer
> > corruption on top of the video signal interference (sic?) I've been
> > experiencing since I filed this bug.

My opinion now is that it has something to do with pixmap cache management.

For some reason, when kdm asks for the pixmaps that comprise its
background, the X server draws from someplace else in video memory.  The
following has me pretty convinced given that it comprises a bunch of images
from recently-viewed webpages and windows that were unmapped when the
previous X session was terminated.

http://redwald.deadbeast.net/tmp/branden_grief_6.jpeg

(Sigh.  I reckon hardcore porn would be less embarrassing than some of
that.)

> > xvidtune no longer works to fix the pinkness and striping effect.  But I
> > reckon this is expected thanks to some X extension jiggery-pokery -- RandR
> > 1.2 superseding XVidMode.  At least that's my vague understanding.
> > Corrections welcome.  :)
> >
> > Based on that conjecture, I poked around with xrandr (the utility), and
> > came up with the following recipe:
> >
> > xrandr --output DVI-1 --mode 0x4f
> > xrandr --output DVI-1 --mode 0x4e

More for the benefit of debian-x folks or general users, I'll note that
sticking the above as the first thing in my $HOME/.xsession works
beautifully.

> > New problem #2: The X cursor is corrupted.  It looks like the cursor has
> > been sectionally barrel-shifted about the vertical axis.  This doesn't
> > visibly affect the insertion point cursor that xterm uses, but the normal
> > right-pointing arrow that KDE uses barely is, and the white hand cursor KDE
> > uses when you hover over the task bar is dramatically affected.
> 
> known server issue see bug:
> https://bugs.freedesktop.org/show_bug.cgi?id=11796

I've applied Michel's fix from that bug and it works great.

-- 
G. Branden Robinson                |       The well-bred contradict other
Debian GNU/Linux                   |       people. The wise contradict
branden at debian.org                 |       themselves.
http://people.debian.org/~branden/ |       -- Oscar Wilde
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