I've encountered the same failure mode here. The keyboard responds only to Alt-SysRq-* keystrokes. This is with an up-to-date Karmic, running on a Dell Optiplex GX260.
Here is the relevant extract from /var/log/syslog, with each line's datestamp/host prefix elided: INFO: task i915/0:258 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. i915/0 D c08145c0 0 258 2 0x00000000 f6b0bf04 00000046 f6720000 c08145c0 f69c9bb8 c08145c0 31ebb26c 00002c0f c08145c0 c08145c0 f69c9bb8 c08145c0 31ebaa58 00002c0f c08145c0 f652a600 f69c9920 f6871814 f6871818 ffffffff f6b0bf30 c056f776 c0748e80 f687181c Call Trace: [<c056f776>] __mutex_lock_slowpath+0xc6/0x130 [<c056f690>] mutex_lock+0x20/0x40 [<f82b8c0a>] i915_gem_retire_work_handler+0x2a/0x70 [i915] [<c0157a7e>] run_workqueue+0x6e/0x140 [<f82b8be0>] ? i915_gem_retire_work_handler+0x0/0x70 [i915] [<c0157bd8>] worker_thread+0x88/0xe0 [<c015c280>] ? autoremove_wake_function+0x0/0x40 [<c0157b50>] ? worker_thread+0x0/0xe0 [<c015bf8c>] kthread+0x7c/0x90 [<c015bf10>] ? kthread+0x0/0x90 [<c0104007>] kernel_thread_helper+0x7/0x10 -- system locks up at random intervals, except mouse https://bugs.launchpad.net/bugs/469820 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
