I also had random 'freezes' of the GUI. The system was still running, but the X session - frozen,
Nothing in the syslog, dmesg or X.org log. I did notice when the VirtualBox modules loaded it complained about a NMI watch dog and 'performance counters'. [ 55.503864] vboxdrv: Trying to deactivate the NMI watchdog permanently... [ 55.503866] vboxdrv: Warning: 2.6.31+ kernel detected. Most likely the hardware performance [ 55.503867] vboxdrv: counter framework which can generate NMIs is active. You have to prevent [ 55.503868] vboxdrv: the usage of hardware performance counters by [ 55.503868] vboxdrv: echo 2 > /proc/sys/kernel/perf_counter_paranoid [ 55.503871] vboxdrv: Found 8 processor cores. [ 55.503920] VBoxDrv: dbg - g_abExecMemory=ffffffffa0e42d60 [ 55.504110] vboxdrv: fAsync=0 offMin=0x317 offMax=0x1e153 [ 55.504135] vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'. [ 55.504136] vboxdrv: Successfully loaded version 3.2.10 (interface 0x00140001). [ 1190.650484] vboxdrv: Trying to deactivate the NMI watchdog permanently... [ 1190.650487] vboxdrv: Successfully done. [ 1190.650490] vboxdrv: Found 8 processor cores. [ 1190.650547] VBoxDrv: dbg - g_abExecMemory=ffffffffa0e42d60 [ 1190.650791] vboxdrv: fAsync=0 offMin=0x2ca offMax=0x2cf2a [ 1190.650836] vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'. [ 1190.650839] vboxdrv: Successfully loaded version 3.2.10 (interface 0x00140001). I removed the vboxdrv module (rmmod vboxdrv) and the random freezes stopped. No reboot or log out or anything. With the module in place the UI would freeze for 10s of seconds every few minutes. With the module unloaded the machine has been happy for over an hour. What I haven't done so far is reload the module and see what happens. I'm running VirtualBox from Oracle's repo and not the OSE version as the original poster appears to be, but there may be a connection. -- Xorg freeze https://bugs.launchpad.net/bugs/660273 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
