[Pkg-xfce-devel] Bug#466687: Bug#466687: Bug#466687: Bug#466687: xfce4: windows are not being redrawn correctly when moving - nv/nvidia driver Xinerama, dualhead

[Yves-Alexis Perez]

On jeu, 2008-02-21 at 18:21 +0100, Jan Capek wrote:
> Disabling xinerama 'solves' the problem however at that point I am
> stuck 
> with 2 independent screens that are not of much use for me.

Ok.
> 
> I am not sure, maybe I should file a bug somewhere in the 'nv',
> 'nvidia' 
> driver area. However, this bug seems to trigger with xfce4 only.

Well, could you try in metacity or openbox, wich support xinerama pretty
well?

> 
> I have made a research and tried the following configurations for
> dual 
> head so far:
> - nvidia driver (2 instances of the device) + Xinerama - this gives
> me 
> satisfying performance, however the above bug occurs in xfce4
> 
> - nvidia driver + TwinView option (X.org's xinerama is disabled) -
> this 
> works fine, however, the performance is VERY BAD. Moving windows
> around 
> is fine. Switching desktop and redrawing of all windows on the
> freshly 
> switched desktop is very very slow
> 
> - nv driver - doesn't support dual head on my nvidia card, xrandr 
> extension doesn't show all connected screens. I will take a look at
> the 
> problem further here.

Well, I guess the problem lies in nvidia driver. I use at work two
nvidia-based cards, using xinerama, and it works pretty fine in Xfce (no
bug like this). But this is using nvidia legacy.
> 
> 
> If anybody can think of a testcase, to duplicate the issue in a 
> different environment than xfce4, I would be more than happy to try
> that.
> 
> I am attaching the two configurations + xrandr output of the twinview 
> one + relevant X.org logs.

The thing is, we can't really debug nvidia proprietary driver...
-- 
Yves-Alexis
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