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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