I recently did a yum update on my F15 which pulled in a new kernel, and a lot of other packages. After a reboot, KDE locked up. Eventually I got a message saying that compositing (for Desktop Effects) had been turned off because my system was too slow (which it is not.) Thankfully I had done a full backup before the update so I restored the old system and the problems vanished. I have KDE configured to use all the nice Desktop Effects which makes heavy use of OpenGL. It has run flawlessly till this update. I then began a process of elimination, restricting (for example) new KDE packages from being updated, restricting the kernel from being updated, &c. with restores of the old system in between. Every single trial hosed KDE's operation. After lots of trials I finally noticed that akmod-nvidia-280.13-4.fc15.x86_64 was always being pulled in, so I finally restricted that (and the new kernel) so that kmod-nvidia would not be recompiled upon reboot. Voila! No KDE problems. One last experiment: I updated _only_ akmod-nvidia, rebooted to allow kmod-nvidia to rebuilt and KDE was hosed. Looking in Xorg.log I saw a boatload of error messages like this KWin::checkGLError: GL error ( PostPaint ): ??? where ??? was a hex number (that, alas, I didn't write down). A google search at the time brought up nothing and I see no recent reported errors with akmod-nvidia. Might one of you nvidia wizards on the list know what's going on or whatq I might do to diagnose the problem? Thanks. Dean -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org