culprit found: Linux version 3.11.0-031100rc5-generic last working version was rc4 as per comment #11
reproduction steps: boot kernel, start regular (random desktop) usage, i.e. multiple chromium sessions, xchat, thunderbird, crashes within minutes/seconds from kern.log (see next attachment) Aug 22 23:36:00 minime kernel: [ 0.000000] Linux version 3.11.0-031100rc5-generic (apw@gomeisa) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #201308112135 SMP Mon Aug 12 01:35:49 UTC 2013 ... Aug 22 23:36:47 minime kernel: [ 62.273638] Oops: 0000 [#1] SMP ... no mce in kern.log this time (afaics) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1214931 Title: kernel oops in free_task To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1214931/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
