Comment 32 for bug 1140716

I got this with a second hang:

[22344.085044] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
[22344.085051] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state
[22344.090106] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[23652.138382] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
[23652.138898] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[23652.146420] ------------[ cut here ]------------
[23652.146491] WARNING: at /home/jsalisbury/bugs/lp1140716/ubuntu-quantal/drivers/gpu/drm/i915/intel_pm.c:2505 gen6_enable_rps+0x706/0x710 [i915]()
[23652.146495] Hardware name: SATELLITE Z830
[23652.146497] Modules linked in: sdhci_pci sdhci snd_hda_codec_hdmi snd_hda_codec_realtek joydev btusb coretemp kvm_intel kvm ghash_clmulni_intel aesni_intel arc4 cryptd aes_x86_64 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm uvcvideo videobuf2_core videodev snd_seq_midi videobuf2_vmalloc videobuf2_memops snd_rawmidi microcode snd_seq_midi_event iwlwifi snd_seq snd_timer snd_seq_device i915 bnep rfcomm mac80211 toshiba_acpi sparse_keymap drm_kms_helper wmi toshiba_bluetooth snd pcspkr bluetooth drm i2c_algo_bit cfg80211 soundcore psmouse mac_hid snd_page_alloc video serio_raw mei lpc_ich parport_pc ppdev nfsd nfs lockd fscache auth_rpcgss nfs_acl lp sunrpc parport ahci libahci e1000e [last unloaded: sdhci]
[23652.146578] Pid: 3451, comm: kworker/u:0 Not tainted 3.5.0-27-generic #45~lp1140716v1
[23652.146581] Call Trace:
[23652.146592] [<ffffffff81051bef>] warn_slowpath_common+0x7f/0xc0
[23652.146599] [<ffffffff81051c4a>] warn_slowpath_null+0x1a/0x20
[23652.146621] [<ffffffffa03f6316>] gen6_enable_rps+0x706/0x710 [i915]
[23652.146640] [<ffffffffa03e2446>] intel_modeset_init_hw+0x66/0xa0 [i915]
[23652.146655] [<ffffffffa03b84b4>] i915_reset+0x1a4/0x6e0 [i915]
[23652.146663] [<ffffffff8101257b>] ? __switch_to+0x12b/0x420
[23652.146679] [<ffffffffa03bd943>] i915_error_work_func+0xc3/0x110 [i915]
[23652.146688] [<ffffffff8107098a>] process_one_work+0x12a/0x420
[23652.146701] [<ffffffffa03bd880>] ? gen6_pm_rps_work+0xe0/0xe0 [i915]
[23652.146707] [<ffffffff8107153e>] worker_thread+0x12e/0x2f0
[23652.146712] [<ffffffff81071410>] ? manage_workers.isra.26+0x200/0x200
[23652.146719] [<ffffffff81076033>] kthread+0x93/0xa0
[23652.146726] [<ffffffff8168ab24>] kernel_thread_helper+0x4/0x10
[23652.146732] [<ffffffff81075fa0>] ? kthread_freezable_should_stop+0x70/0x70
[23652.146737] [<ffffffff8168ab20>] ? gs_change+0x13/0x13
[23652.146740] ---[ end trace 2153106cc632835c ]---