Hi, I think X freezes with nVidia cards on multiple-core systems have been a major pain for Linux users for a long time. My troubles began in 2008 on Ubuntu "Gutsy Gibbon", when I upgraded my system to a dual-core Athlon64 X2. At the moment I'm living (not too happily) with an ATi 3450 HD, which behaves horribly in Compiz but, at least, doesn't freeze my system. Guess you don't make a great bargain when you migrate to Linux for stability and you find out that a video driver makes it even worse than in Windows! ;) Back then, I reported the bug here:
https://bugs.launchpad.net/ubuntu/+source/linux-restricted- modules-2.6.24/+bug/151382 As I said there, I believe my problems stemmed from dual-core kernel CPU switching, coupled with nVidia drivers trying to distribute GPU load over multiple CPUs. In post #21 I reported that looking around over the net, I had found a way to reduce (not eliminate, though) the problem, thanks to this command: echo 1 > /sys/devices/system/cpu/sched_mc_power_savings (you must be super-user to issue it) It would be interesting to see if it can help with today's kernels, too. I have no more my old nVidia card, but if someone wants to try it, there's the more correct way that Martin Zuther suggested in reply to my post: "There is however an easier way to achieve it - just start your system, open the terminal and type: echo 1 | sudo tee /sys/devices/system/cpu/sched_mc_power_savings You can verify that it works with "cat /sys/devices/system/cpu/sched_mc_power_savings" " Hope it helps find the reason of this sneaky bug! -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/733374 Title: X freeze, nvidia-current, Ubuntu 11.04 Maverick GeForce 9600GT To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/733374/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
