Bug#384441: libgl1-mesa-dri: Incorrect rendering in OpenGL applications

[Mikko Rasa]

>>I have recently been getting serious rendering problems with Mesa.  For
>>example, glxgears looks like this:
>>
>>http://tdb.fi/~tdb/glxgears-bug.png
> 
> 
> This particular issue is a glxgears bug which has been fixed upstream in
> Mesa 6.5. It only happens with some window managers or when running
> without a window manager.
 >
 >
>>My own applications show their graphics shifted left by about half the
>>window size.
> 
> This has been reported a couple of times (but unfortunately, I can't
> find the other reports in the tangled woods of Mesa bug reports...) and
> is fixed in libgl1-mesa-dri in experimental.

Hm, true.  I tried the experimental version previously, but apparently 
only tested glxgears, which was corrupted due to its own bug.

> As this is the only issue clearly in libgl1-mesa-dri, let's focus on
> this one in this report. Please don't mix several issues into one
> report.

Sorry about that.

>>My graphics card is a Redeon ViVo from 2001, Xorg says "Chipset ATI
>>Radeon QD (AGP) found."  A couple of reasons lead me to believe this is
>>not a hardware failure:
>>1. I have also seen this on an i915 machine
> 
> Which of the separate issues above?

The glxgears one.

>>2. glxgears exhibits the problem with software rendering as well
> 
> Which should have told you that's not a libgl1-mesa-dri issue.

Good point.  Sorry for not thinking.