Here as well: ThinkPad Edge, Ubuntu 10.04 LTS, 2.6.32-22-generic. Display freezes, but otherwise the machine is responsive (logs continue, ssh works etc).

lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 12)

lspci -s 00:02.0 -n
00:02.0 0300: 8086:0046 (rev 12)

kernel: [ 2936.275191] INFO: task i915:779 blocked for more than 120 seconds.
kernel: [ 2936.275198] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kernel: [ 2936.275203] i915          D 00000000ffffffff     0   779      2 0x00000000
kernel: [ 2936.275213]  ffff880146de7d40 0000000000000046 0000000000015bc0 0000000000015bc0
kernel: [ 2936.275221]  ffff8801486a9ab0 ffff880146de7fd8 0000000000015bc0 ffff8801486a96f0
kernel: [ 2936.275229]  0000000000015bc0 ffff880146de7fd8 0000000000015bc0 ffff8801486a9ab0
kernel: [ 2936.275237] Call Trace:
kernel: [ 2936.275254]  [<ffffffff8153f897>] __mutex_lock_slowpath+0xe7/0x170
kernel: [ 2936.275265]  [<ffffffff81058620>] ? finish_task_switch+0x50/0xe0
kernel: [ 2936.275272]  [<ffffffff8153f78b>] mutex_lock+0x2b/0x50
kernel: [ 2936.275305]  [<ffffffffa015437d>] i915_gem_retire_work_handler+0x3d/0xa0 [i915]
kernel: [ 2936.275327]  [<ffffffffa0154340>] ? i915_gem_retire_work_handler+0x0/0xa0 [i915]
kernel: [ 2936.275337]  [<ffffffff81080777>] run_workqueue+0xc7/0x1a0
kernel: [ 2936.275344]  [<ffffffff810808f3>] worker_thread+0xa3/0x110
kernel: [ 2936.275351]  [<ffffffff81085320>] ? autoremove_wake_function+0x0/0x40
kernel: [ 2936.275358]  [<ffffffff81080850>] ? worker_thread+0x0/0x110
kernel: [ 2936.275364]  [<ffffffff81084fa6>] kthread+0x96/0xa0
kernel: [ 2936.275372]  [<ffffffff810141ea>] child_rip+0xa/0x20
kernel: [ 2936.275378]  [<ffffffff81084f10>] ? kthread+0x0/0xa0
kernel: [ 2936.275383]  [<ffffffff810141e0>] ? child_rip+0x0/0x20
kernel: [ 2936.275401] INFO: task Xorg:1148 blocked for more than 120 seconds.
kernel: [ 2936.275404] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kernel: [ 2936.275408] Xorg          D 0000000000000000     0  1148   1093 0x00400004
kernel: [ 2936.275416]  ffff880144b0dc98 0000000000000086 0000000000015bc0 0000000000015bc0
kernel: [ 2936.275423]  ffff8801449a1ab0 ffff880144b0dfd8 0000000000015bc0 ffff8801449a16f0
kernel: [ 2936.275431]  0000000000015bc0 ffff880144b0dfd8 0000000000015bc0 ffff8801449a1ab0
kernel: [ 2936.275438] Call Trace:
kernel: [ 2936.275446]  [<ffffffff8153f897>] __mutex_lock_slowpath+0xe7/0x170
kernel: [ 2936.275453]  [<ffffffff8153f78b>] mutex_lock+0x2b/0x50
kernel: [ 2936.275473]  [<ffffffffa0155be9>] i915_gem_set_domain_ioctl+0xb9/0x160 [i915]
kernel: [ 2936.275496]  [<ffffffffa0096e2a>] drm_ioctl+0x27a/0x480 [drm]
kernel: [ 2936.275517]  [<ffffffffa0155b30>] ? i915_gem_set_domain_ioctl+0x0/0x160 [i915]
kernel: [ 2936.275525]  [<ffffffff81085320>] ? autoremove_wake_function+0x0/0x40
kernel: [ 2936.275534]  [<ffffffff81152a92>] vfs_ioctl+0x22/0xa0
kernel: [ 2936.275540]  [<ffffffff81152d41>] do_vfs_ioctl+0x81/0x380
kernel: [ 2936.275547]  [<ffffffff811431df>] ? vfs_read+0x12f/0x1a0
kernel: [ 2936.275553]  [<ffffffff811530c1>] sys_ioctl+0x81/0xa0
kernel: [ 2936.275561]  [<ffffffff810131b2>] system_call_fastpath+0x16/0x1b