This seems to affect me as well. The symptoms: under heavy load (while chrome is running, although I'm not sure it's related) the disk light starts be on constantly (rather than flashing) and after 2-3 minutes without disk access the computer freezes completely.
Some more details: Linux cdman-BIG 3.2.0-32-generic #51-Ubuntu SMP Wed Sep 26 21:33:09 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Dell XPS 17 L702x, IntelĀ® CoreTM i7-2760QM 2.40GHz, 8GB, SSD 256GB, Blu- Ray, nVidia GeForce GT 555M 3GB Using Gnome 3 and bumblebee. Let me know what additional details would help investigate this issue. In my syslog I see (which is how I found this bugreport): Oct 31 08:55:25 cdman-BIG kernel: [105962.780109] type=1701 audit(1351666525.555:126): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=10113 comm="chromium-browse" reason="seccomp" sig=0 syscall=2 compat=0 ip=0x7fe305280257 code=0x50002 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1029504 Title: System freezes randomly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1029504/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs