I don't have a way to reproduce it, but it has happened more than once. My computer froze again just now, but didn't recover even after a long time, so might be a different problem. After rebooting it, I found this in /var/log/syslog:
Nov 8 13:59:45 dima-xps kernel: [57919.834817] INFO: task compiz:2502 blocked for more than 120 seconds. Nov 8 13:59:46 dima-xps kernel: [57919.834821] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 8 13:59:46 dima-xps kernel: [57919.834823] compiz D ffff88011fad39c0 0 2502 2415 0x00000000 Nov 8 13:59:46 dima-xps kernel: [57919.834829] ffff8800d4aa9888 0000000000000082 ffff8800c7555c00 ffff8800d4aa9fd8 Nov 8 13:59:46 dima-xps kernel: [57919.834834] ffff8800d4aa9fd8 ffff8800d4aa9fd8 ffff8800732c9700 ffff8800c7555c00 Nov 8 13:59:46 dima-xps kernel: [57919.834838] ffff8800d4aa9868 ffff8800c7555c00 ffff88011fad4258 0000000000000002 Nov 8 13:59:46 dima-xps kernel: [57919.834843] Call Trace: Nov 8 13:59:46 dima-xps kernel: [57919.834852] [<ffffffff811229b0>] ? __lock_page+0x70/0x70 Nov 8 13:59:46 dima-xps kernel: [57919.834859] [<ffffffff81682459>] schedule+0x29/0x70 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1075752 Title: My system froze for several minutes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1075752/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
