I have a similar/related problem that began occuring after upgrading to ubuntu 12.04, but mine occurs during boot. Approximately 1 out of 5 times, the boot fails with a segfault in libfreetype.so.6.8.0 when gnome-shell starts up. It exibits 2 different symptoms. To recover from either, I ctrl+alt+f2 login and reboot. Have not tried any of the other restart options or fixes yet, but will report results when available. Once system is started correctly, I have never had gnome-shell crash on me. The relevent sections of the dmesg output is shown below.
System configuration: ubuntu 12.04 x64, AMD 955 x64 processor, 8 GB ram, Nvidia card with proprietary drivers, and dual monitor setup Symptom 1: background displayed, but no title bar or cursor displayed (here is associated dmesg) [ 21.586996] r8169 0000:02:00.0: eth0: link down [ 21.587011] r8169 0000:02:00.0: eth0: link down [ 21.587730] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 21.588063] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 21.616534] init: kdm main process (1846) killed by TERM signal [ 21.619658] init: gdm main process (1875) killed by TERM signal [ 21.722958] vboxdrv: Found 4 processor cores. [ 21.723167] vboxdrv: fAsync=0 offMin=0x482 offMax=0x1938 [ 21.723215] vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'. [ 21.723216] vboxdrv: Successfully loaded version 4.1.16 (interface 0x00190000). [ 21.929098] vboxpci: IOMMU not found (not registered) [ 23.827735] r8169 0000:02:00.0: eth0: link up [ 23.828553] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 29.975832] show_signal_msg: 42 callbacks suppressed [ 29.975836] gnome-shell[2766]: segfault at ffff3774 ip 00007fd430051c6f sp 00007fff09715860 error 4 in libfreetype.so.6.8.0[7fd42fff7000+96000] [ 34.064017] eth0: no IPv6 routers present Symptom 2: background displayed, title bar displayed, network icon showing red, no cursor displayed [ 21.668011] r8169 0000:02:00.0: eth0: link down [ 21.668017] r8169 0000:02:00.0: eth0: link down [ 21.669224] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 21.669922] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 21.697989] init: kdm main process (1788) killed by TERM signal [ 21.699976] init: gdm main process (1818) killed by TERM signal [ 21.774952] vboxdrv: Found 4 processor cores. [ 21.775267] vboxdrv: fAsync=0 offMin=0x4ef offMax=0x26b8 [ 21.775315] vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'. [ 21.775316] vboxdrv: Successfully loaded version 4.1.18 (interface 0x00190000). [ 21.980970] vboxpci: IOMMU not found (not registered) [ 23.726876] r8169 0000:02:00.0: eth0: link up [ 23.727662] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 27.805113] show_signal_msg: 42 callbacks suppressed [ 27.805117] pool[2676]: segfault at 8 ip 00007f116ee56a23 sp 00007f1132feb990 error 4 in libfreetype.so.6.8.0[7f116ee07000+96000] [ 33.936004] eth0: no IPv6 routers present -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/889706 Title: Gnome-shell randomly crashes To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/889706/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
