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