KDE + X + Nvidia problems

[Armelius Cameron]

Hello,
I am having some issues with KDE + X + Nvidia right now, not sure which one is 
the cause, but I am wondering if anyone here has seen the same thing or if 
there's any workaround.

My system: 8 core Intel i7, graphic card (as output by "lspci") VGA compatible 
controller: nVidia Corporation G98 [Quadro NVS 295] (rev a1). Running fully 
updated F14.

Initially I just used Nouveau driver. For the most part, it works just fine (3D 
accel., window compositing), but recently I got more and more lock-up. I got 
error messages on /var/log/messages similar to 
https://bugzilla.redhat.com/show_bug.cgi?id=618143, but there is no resolution 
there. Interestingly, the every lock-up happens when I switch desktop and then 
try to interact with Kontact (e.g. check email, my kontact is always full-
screen on a virtual desktop). When the desktop locks-up, I can't even switch 
it to another TTY, although I can SSH to it from another machine and reboot it 
(switching to init 3 or init 1 didn't work).


So I got tired of it, and just yesterday tried proprietary Nvidia driver from 
RPMFusion (basically following the how-to there). With this driver, I haven't 
had any lock-up yet, but KDE apps are behaving poorly:
1.  Kile with simple latex file would be so sluggish, X uses  > 90% of CPU on 
"top", with "kile" as the next process on the list.
2. Kate basically has similar behavior
3. kwrite has similar behaviour
4. Kmail / Kontact has similar behavior (esp. with composer window), but much 
less severe (CPU usage for X is hovering around 40 - 50%).

So... what's happening here ? Anyone has seen this ? I'm baffled.

Thanks.
AC
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