I am experiencing a similar problem. On reboot kdm starts fine. I logout and I get a blank screen, no command line no nothing. If I ssh in from another computer and check the kdm.log and Xorg.0.logs I get the same error messages.
Backtrace: 0: /usr/bin/X(xf86SigHandler+0x6a) [0x48402a] 1: /lib/libc.so.6 [0x7f9b91f3d100] 2: /usr/lib/xorg/modules/drivers//nvidia_drv.so [0x7f9b8fc1c780] Fatal server error: Caught signal 11. Server aborting "ps uax | grep kdm" shows that kdm is still running So the X server is dead but kdm is still running. Now if I kill the running kdm and then restart kdm "/usr/bin/kdm -config /var/run/kdm/kdmrc" Both the X server and kdm will restart just fine no problems no errors. So the problem is some how related to the restarting of the X server on logout. nvidia-glx 1:96.43.05+2.6.24.13-19.42 nvidia-kernel-common 20051028+1ubuntu8 nvidia-new-kernel-source 169.12+2.6.24.13-19.42 linux-image-2.6.24-19-generic 2.6.24-19.34 x11-common 1:7.3+10ubuntu10 libc6 2.7-10ubuntu3 I am running dual displays on a Dell Precision 390 Intel(R) Core(TM)2 CPU 6300 @ 1.86GHz nVidia Corporation NV44 [Quadro NVS 285] ** Attachment added: "xorg.conf" http://launchpadlibrarian.net/15698330/xorg.conf -- nvidia_drv.so crash during X restart by kdm https://bugs.launchpad.net/bugs/202855 You received this bug notification because you are a member of Kubuntu Team, which is subscribed to kdebase in ubuntu. -- kubuntu-bugs mailing list [EMAIL PROTECTED] https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs