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[Bug 1384297] Re: After system resume, Intel i915 graphics hangs

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: KeithG <1384297@xxxxxxxxxxxxxxxxxx>
Date: Sun, 24 Apr 2016 11:41:26 -0000
Reply-to: Bug 1384297 <1384297@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
how about 16.04? It does not hang any more, but the message is still
repeated many times in the dmesg log:

[    1.940071] ------------[ cut here ]------------
[    1.940109] WARNING: CPU: 1 PID: 6 at /build/linux-Ay7j_C/linux-4.4.0/drivers/gpu/drm/drm_irq.c:1326 drm_wait_one_vblank+0x1b5/0x1c0 [drm]()
[    1.940113] vblank wait timed out on crtc 0
[    1.940116] Modules linked in: hid_generic usbhid hid i915 psmouse ahci i2c_algo_bit firewire_ohci libahci sdhci_pci pata_acpi sdhci firewire_core drm_kms_helper crc_itu_t syscopyarea sysfillrect ssb sysimgblt fb_sys_fops sky2 drm wmi fjes video
[    1.940155] CPU: 1 PID: 6 Comm: kworker/u4:0 Not tainted 4.4.0-21-generic #37-Ubuntu
[    1.940158] Hardware name: Dell Inc. Inspiron 1525                   /0U990C, BIOS A17 10/27/2009
[    1.940166] Workqueue: events_unbound async_run_entry_fn
[    1.940171]  0000000000000286 00000000601d6afd ffff8800bb7f7a08 ffffffff813e93c3
[    1.940177]  ffff8800bb7f7a50 ffffffffc0058b10 ffff8800bb7f7a40 ffffffff81080f62
[    1.940188]  ffff880035df3800 0000000000000000 0000000000000000 0000000000000003
[    1.940191] Call Trace:
[    1.940197]  [<ffffffff813e93c3>] dump_stack+0x63/0x90
[    1.940202]  [<ffffffff81080f62>] warn_slowpath_common+0x82/0xc0
[    1.940204]  [<ffffffff81080ffc>] warn_slowpath_fmt+0x5c/0x80
[    1.940209]  [<ffffffff810c3575>] ? finish_wait+0x55/0x70
[    1.940224]  [<ffffffffc00292a5>] drm_wait_one_vblank+0x1b5/0x1c0 [drm]
[    1.940227]  [<ffffffff810c3a10>] ? wake_atomic_t_function+0x60/0x60
[    1.940285]  [<ffffffffc0208339>] intel_get_load_detect_pipe+0x529/0x530 [i915]
[    1.940325]  [<ffffffffc02418ed>] intel_tv_detect+0x13d/0x5f0 [i915]
[    1.940341]  [<ffffffffc00e7da5>] drm_helper_probe_single_connector_modes_merge_bits+0x235/0x4d0 [drm_kms_helper]
[    1.940349]  [<ffffffffc00e8053>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
[    1.940358]  [<ffffffffc00f491e>] drm_fb_helper_initial_config+0xae/0x420 [drm_kms_helper]
[    1.940396]  [<ffffffffc02184bb>] intel_fbdev_initial_config+0x1b/0x20 [i915]
[    1.940399]  [<ffffffff810a2f28>] async_run_entry_fn+0x48/0x150
[    1.940402]  [<ffffffff81099ff2>] process_one_work+0x162/0x480
[    1.940405]  [<ffffffff8109a35b>] worker_thread+0x4b/0x4c0
[    1.940408]  [<ffffffff8109a310>] ? process_one_work+0x480/0x480
[    1.940411]  [<ffffffff810a0528>] kthread+0xd8/0xf0
[    1.940414]  [<ffffffff810a0450>] ? kthread_create_on_node+0x1e0/0x1e0
[    1.940418]  [<ffffffff8182488f>] ret_from_fork+0x3f/0x70
[    1.940420]  [<ffffffff810a0450>] ? kthread_create_on_node+0x1e0/0x1e0
[    1.940423] ---[ end trace f06ce4fed187d576 ]---
[    1.946160]  sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7 sda8 sda9 >
[    1.947069] sd 2:0:0:0: [sda] Attached SCSI disk
[    2.016251] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x39834d15f18, max_idle_ns: 881590752306 ns
[    2.072400] firewire_core 0000:02:09.0: created device fw0: GUID 444fc0000d6981e1, S400
[    2.084258] ------------[ cut here ]------------
[    2.084291] WARNING: CPU: 1 PID: 6 at /build/linux-Ay7j_C/linux-4.4.0/drivers/gpu/drm/drm_irq.c:1326 drm_wait_one_vblank+0x1b5/0x1c0 [drm]()
[    2.084295] vblank wait timed out on crtc 0
[    2.084297] Modules linked in: hid_generic usbhid hid i915 psmouse ahci i2c_algo_bit firewire_ohci libahci sdhci_pci pata_acpi sdhci firewire_core drm_kms_helper crc_itu_t syscopyarea sysfillrect ssb sysimgblt fb_sys_fops sky2 drm wmi fjes video
[    2.084333] CPU: 1 PID: 6 Comm: kworker/u4:0 Tainted: G        W       4.4.0-21-generic #37-Ubuntu
[    2.084337] Hardware name: Dell Inc. Inspiron 1525                   /0U990C, BIOS A17 10/27/2009
[    2.084344] Workqueue: events_unbound async_run_entry_fn
[    2.084348]  0000000000000286 00000000601d6afd ffff8800bb7f7938 ffffffff813e93c3
[    2.084354]  ffff8800bb7f7980 ffffffffc0058b10 ffff8800bb7f7970 ffffffff81080f62
[    2.084360]  ffff880035df3800 0000000000000000 0000000000000000 0000000000000005
[    2.084365] Call Trace:
[    2.084378]  [<ffffffff813e93c3>] dump_stack+0x63/0x90
[    2.084382]  [<ffffffff81080f62>] warn_slowpath_common+0x82/0xc0
[    2.084384]  [<ffffffff81080ffc>] warn_slowpath_fmt+0x5c/0x80
[    2.084388]  [<ffffffff810c3575>] ? finish_wait+0x55/0x70
[    2.084403]  [<ffffffffc00292a5>] drm_wait_one_vblank+0x1b5/0x1c0 [drm]
[    2.084406]  [<ffffffff810c3a10>] ? wake_atomic_t_function+0x60/0x60
[    2.084452]  [<ffffffffc0202052>] intel_pre_disable_primary+0x52/0x80 [i915]
[    2.084491]  [<ffffffffc0202287>] intel_pre_plane_update+0x107/0x140 [i915]
[    2.084530]  [<ffffffffc0202800>] intel_atomic_commit+0xf0/0x6f0 [i915]
[    2.084549]  [<ffffffffc004280e>] ? drm_atomic_check_only+0x18e/0x590 [drm]
[    2.084569]  [<ffffffffc0042cf0>] ? drm_atomic_set_fb_for_plane+0x20/0x90 [drm]
[    2.084588]  [<ffffffffc0042c47>] drm_atomic_commit+0x37/0x60 [drm]
[    2.084626]  [<ffffffffc0208460>] intel_release_load_detect_pipe+0x120/0x160 [i915]
[    2.084666]  [<ffffffffc0241aeb>] intel_tv_detect+0x33b/0x5f0 [i915]
[    2.084677]  [<ffffffffc00e7da5>] drm_helper_probe_single_connector_modes_merge_bits+0x235/0x4d0 [drm_kms_helper]
[    2.084685]  [<ffffffffc00e8053>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
[    2.084694]  [<ffffffffc00f491e>] drm_fb_helper_initial_config+0xae/0x420 [drm_kms_helper]
[    2.084733]  [<ffffffffc02184bb>] intel_fbdev_initial_config+0x1b/0x20 [i915]
[    2.084736]  [<ffffffff810a2f28>] async_run_entry_fn+0x48/0x150
[    2.084739]  [<ffffffff81099ff2>] process_one_work+0x162/0x480
[    2.084742]  [<ffffffff8109a35b>] worker_thread+0x4b/0x4c0
[    2.084745]  [<ffffffff8109a310>] ? process_one_work+0x480/0x480
[    2.084747]  [<ffffffff810a0528>] kthread+0xd8/0xf0
[    2.084750]  [<ffffffff810a0450>] ? kthread_create_on_node+0x1e0/0x1e0
[    2.084754]  [<ffffffff8182488f>] ret_from_fork+0x3f/0x70
[    2.084757]  [<ffffffff810a0450>] ? kthread_create_on_node+0x1e0/0x1e0
[    2.084759] ---[ end trace f06ce4fed187d577 ]---
[    2.184216] ------------[ cut here ]------------
[    2.184244] WARNING: CPU: 1 PID: 6 at /build/linux-Ay7j_C/linux-4.4.0/drivers/gpu/drm/drm_irq.c:1326 drm_wait_one_vblank+0x1b5/0x1c0 [drm]()
[    2.184247] vblank wait timed out on crtc 0
[    2.184249] Modules linked in: hid_generic usbhid hid i915 psmouse ahci i2c_algo_bit firewire_ohci libahci sdhci_pci pata_acpi sdhci firewire_core drm_kms_helper crc_itu_t syscopyarea sysfillrect ssb sysimgblt fb_sys_fops sky2 drm wmi fjes video
[    2.184282] CPU: 1 PID: 6 Comm: kworker/u4:0 Tainted: G        W       4.4.0-21-generic #37-Ubuntu
[    2.184285] Hardware name: Dell Inc. Inspiron 1525                   /0U990C, BIOS A17 10/27/2009
[    2.184290] Workqueue: events_unbound async_run_entry_fn
[    2.184294]  0000000000000286 00000000601d6afd ffff8800bb7f7958 ffffffff813e93c3
[    2.184299]  ffff8800bb7f79a0 ffffffffc0058b10 ffff8800bb7f7990 ffffffff81080f62
[    2.184305]  ffff880035df3800 0000000000000000 0000000000000000 0000000000000005
[    2.184310] Call Trace:
[    2.184316]  [<ffffffff813e93c3>] dump_stack+0x63/0x90
[    2.184320]  [<ffffffff81080f62>] warn_slowpath_common+0x82/0xc0
[    2.184325]  [<ffffffff81080ffc>] warn_slowpath_fmt+0x5c/0x80
[    2.184330]  [<ffffffff810c3575>] ? finish_wait+0x55/0x70
[    2.184354]  [<ffffffffc00292a5>] drm_wait_one_vblank+0x1b5/0x1c0 [drm]
[    2.184360]  [<ffffffff810c3a10>] ? wake_atomic_t_function+0x60/0x60
[    2.184409]  [<ffffffffc01fcf9f>] i9xx_crtc_disable+0x3f/0x450 [i915]
[    2.184447]  [<ffffffffc01f4f8c>] ? intel_crtc_disable_planes+0xdc/0xf0 [i915]
[    2.184486]  [<ffffffffc0202820>] intel_atomic_commit+0x110/0x6f0 [i915]
[    2.184506]  [<ffffffffc004280e>] ? drm_atomic_check_only+0x18e/0x590 [drm]
[    2.184525]  [<ffffffffc0042cf0>] ? drm_atomic_set_fb_for_plane+0x20/0x90 [drm]
[    2.184544]  [<ffffffffc0042c47>] drm_atomic_commit+0x37/0x60 [drm]
[    2.184582]  [<ffffffffc0208460>] intel_release_load_detect_pipe+0x120/0x160 [i915]
[    2.184622]  [<ffffffffc0241aeb>] intel_tv_detect+0x33b/0x5f0 [i915]
[    2.184631]  [<ffffffffc00e7da5>] drm_helper_probe_single_connector_modes_merge_bits+0x235/0x4d0 [drm_kms_helper]
[    2.184639]  [<ffffffffc00e8053>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
[    2.184648]  [<ffffffffc00f491e>] drm_fb_helper_initial_config+0xae/0x420 [drm_kms_helper]
[    2.184686]  [<ffffffffc02184bb>] intel_fbdev_initial_config+0x1b/0x20 [i915]
[    2.184689]  [<ffffffff810a2f28>] async_run_entry_fn+0x48/0x150
[    2.184692]  [<ffffffff81099ff2>] process_one_work+0x162/0x480
[    2.184695]  [<ffffffff8109a35b>] worker_thread+0x4b/0x4c0
[    2.184698]  [<ffffffff8109a310>] ? process_one_work+0x480/0x480
[    2.184700]  [<ffffffff810a0528>] kthread+0xd8/0xf0
[    2.184703]  [<ffffffff810a0450>] ? kthread_create_on_node+0x1e0/0x1e0
[    2.184706]  [<ffffffff8182488f>] ret_from_fork+0x3f/0x70
[    2.184709]  [<ffffffff810a0450>] ? kthread_create_on_node+0x1e0/0x1e0
[    2.184711] ---[ end trace f06ce4fed187d578 ]---

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https://bugs.launchpad.net/bugs/1384297

Title:
  After system resume, Intel i915 graphics hangs

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Utopic:
  Won't Fix

Bug description:
  [ 3871.551684] WARNING: CPU: 2 PID: 2161 at /build/buildd/linux-3.16.0/drivers/gpu/drm/i915/intel_pm.c:5997 intel_display_power_put+0x14c/0x160 [i915]()
  [ 3871.551686] Modules linked in: ctr ccm ec_sys dm_crypt intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul arc4 ghash_clmulni_intel rfcomm dm_multipath scsi_dh bnep aesni_intel iwlmvm hid_multitouch aes_x86_64 mac80211 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_codec_hdmi snd_hda_codec_realtek iwlwifi snd_hda_codec_generic nfsd rtsx_pci_ms snd_hda_intel auth_rpcgss snd_hda_controller nfs_acl btusb memstick joydev snd_hda_codec nfs lockd snd_hwdep bluetooth snd_seq_midi snd_seq_midi_event sunrpc snd_rawmidi snd_soc_rt5640 6lowpan_iphc fscache snd_soc_rl6231 cfg80211 snd_seq snd_soc_core snd_compress binfmt_misc snd_pcm_dmaengine snd_pcm snd_seq_device tpm_infineon snd_timer lpc_ich dw_dmac dw_dmac_core i2c_hid 8250_dw i2c_designware_platform
  [ 3871.551704]  i2c_designware_core snd shpchp snd_soc_sst_acpi mei_me mei spi_pxa2xx_platform mac_hid soundcore serio_raw parport_pc ppdev lp parport btrfs xor raid6_pq dm_mirror dm_region_hash dm_log mmc_block usbhid hid rtsx_pci_sdmmc i915 i2c_algo_bit rtsx_pci psmouse ahci drm_kms_helper r8169 libahci mii drm wmi sdhci_acpi video sdhci
  [ 3871.551717] CPU: 2 PID: 2161 Comm: unity-system-co Tainted: G        W I   3.16.0-23-generic #30-Ubuntu
  [ 3871.551718] Hardware name: System76, Inc                    Darter UltraThin/Darter UltraThin, BIOS 4.6.5 10/28/2013
  [ 3871.551719]  0000000000000009 ffff8800d70efae0 ffffffff8177fcbc 0000000000000000
  [ 3871.551721]  ffff8800d70efb18 ffffffff8106fd8d ffff88021008002c 000000000000000b
  [ 3871.551722]  ffff880210088520 ffff8802106c3000 ffff880210080000 ffff8800d70efb28
  [ 3871.551724] Call Trace:
  [ 3871.551729]  [<ffffffff8177fcbc>] dump_stack+0x45/0x56
  [ 3871.551732]  [<ffffffff8106fd8d>] warn_slowpath_common+0x7d/0xa0
  [ 3871.551734]  [<ffffffff8106fe6a>] warn_slowpath_null+0x1a/0x20
  [ 3871.551742]  [<ffffffffc026525c>] intel_display_power_put+0x14c/0x160 [i915]
  [ 3871.551754]  [<ffffffffc02adff4>] modeset_update_crtc_power_domains+0x204/0x210 [i915]
  [ 3871.551765]  [<ffffffffc02ae00e>] haswell_modeset_global_resources+0xe/0x10 [i915]
  [ 3871.551775]  [<ffffffffc02af70a>] __intel_set_mode+0x5fa/0xab0 [i915]
  [ 3871.551785]  [<ffffffffc02b2af6>] intel_set_mode+0x16/0x30 [i915]
  [ 3871.551794]  [<ffffffffc02b3bba>] intel_crtc_set_config+0xa4a/0xda0 [i915]
  [ 3871.551804]  [<ffffffffc01956d1>] drm_mode_set_config_internal+0x61/0xe0 [drm]
  [ 3871.551813]  [<ffffffffc01961e1>] drm_framebuffer_remove+0xe1/0x140 [drm]
  [ 3871.551822]  [<ffffffffc019a1ff>] drm_mode_rmfb+0xdf/0x110 [drm]
  [ 3871.551828]  [<ffffffffc0189a4f>] drm_ioctl+0x1df/0x680 [drm]
  [ 3871.551831]  [<ffffffff811f77e4>] ? dentry_free+0x34/0x40
  [ 3871.551833]  [<ffffffff811f81aa>] ? __dentry_kill+0x17a/0x200
  [ 3871.551835]  [<ffffffff811f83b0>] ? dput+0x180/0x1c0
  [ 3871.551837]  [<ffffffff812016b4>] ? mntput+0x24/0x40
  [ 3871.551838]  [<ffffffff811f4bc8>] do_vfs_ioctl+0x2c8/0x4a0
  [ 3871.551840]  [<ffffffff811e285e>] ? ____fput+0xe/0x10
  [ 3871.551842]  [<ffffffff810919ac>] ? task_work_run+0xbc/0xf0
  [ 3871.551843]  [<ffffffff811f4e21>] SyS_ioctl+0x81/0xa0
  [ 3871.551845]  [<ffffffff81787ced>] system_call_fastpath+0x1a/0x1f

  [ 3871.551854] WARNING: CPU: 2 PID: 2161 at /build/buildd/linux-3.16.0/drivers/gpu/drm/i915/intel_pm.c:6001 intel_display_power_put+0xf9/0x160 [i915]()
  [ 3871.551854] Modules linked in: ctr ccm ec_sys dm_crypt intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul arc4 ghash_clmulni_intel rfcomm dm_multipath scsi_dh bnep aesni_intel iwlmvm hid_multitouch aes_x86_64 mac80211 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_codec_hdmi snd_hda_codec_realtek iwlwifi snd_hda_codec_generic nfsd rtsx_pci_ms snd_hda_intel auth_rpcgss snd_hda_controller nfs_acl btusb memstick joydev snd_hda_codec nfs lockd snd_hwdep bluetooth snd_seq_midi snd_seq_midi_event sunrpc snd_rawmidi snd_soc_rt5640 6lowpan_iphc fscache snd_soc_rl6231 cfg80211 snd_seq snd_soc_core snd_compress binfmt_misc snd_pcm_dmaengine snd_pcm snd_seq_device tpm_infineon snd_timer lpc_ich dw_dmac dw_dmac_core i2c_hid 8250_dw i2c_designware_platform
  [ 3871.551872]  i2c_designware_core snd shpchp snd_soc_sst_acpi mei_me mei spi_pxa2xx_platform mac_hid soundcore serio_raw parport_pc ppdev lp parport btrfs xor raid6_pq dm_mirror dm_region_hash dm_log mmc_block usbhid hid rtsx_pci_sdmmc i915 i2c_algo_bit rtsx_pci psmouse ahci drm_kms_helper r8169 libahci mii drm wmi sdhci_acpi video sdhci
  [ 3871.551883] CPU: 2 PID: 2161 Comm: unity-system-co Tainted: G        W I   3.16.0-23-generic #30-Ubuntu
  [ 3871.551884] Hardware name: System76, Inc                    Darter UltraThin/Darter UltraThin, BIOS 4.6.5 10/28/2013
  [ 3871.551884]  0000000000000009 ffff8800d70efae0 ffffffff8177fcbc 0000000000000000
  [ 3871.551886]  ffff8800d70efb18 ffffffff8106fd8d ffffffffc0313800 0000000000000800
  [ 3871.551887]  ffff880210088520 0000000000000000 ffff880210080000 ffff8800d70efb28
  [ 3871.551889] Call Trace:
  [ 3871.551891]  [<ffffffff8177fcbc>] dump_stack+0x45/0x56
  [ 3871.551893]  [<ffffffff8106fd8d>] warn_slowpath_common+0x7d/0xa0
  [ 3871.551895]  [<ffffffff8106fe6a>] warn_slowpath_null+0x1a/0x20
  [ 3871.551902]  [<ffffffffc0265209>] intel_display_power_put+0xf9/0x160 [i915]
  [ 3871.551913]  [<ffffffffc02adff4>] modeset_update_crtc_power_domains+0x204/0x210 [i915]
  [ 3871.551923]  [<ffffffffc02ae00e>] haswell_modeset_global_resources+0xe/0x10 [i915]
  [ 3871.551932]  [<ffffffffc02af70a>] __intel_set_mode+0x5fa/0xab0 [i915]
  [ 3871.551942]  [<ffffffffc02b2af6>] intel_set_mode+0x16/0x30 [i915]
  [ 3871.551951]  [<ffffffffc02b3bba>] intel_crtc_set_config+0xa4a/0xda0 [i915]
  [ 3871.551959]  [<ffffffffc01956d1>] drm_mode_set_config_internal+0x61/0xe0 [drm]
  [ 3871.551967]  [<ffffffffc01961e1>] drm_framebuffer_remove+0xe1/0x140 [drm]
  [ 3871.551976]  [<ffffffffc019a1ff>] drm_mode_rmfb+0xdf/0x110 [drm]
  [ 3871.551981]  [<ffffffffc0189a4f>] drm_ioctl+0x1df/0x680 [drm]
  [ 3871.551984]  [<ffffffff811f77e4>] ? dentry_free+0x34/0x40
  [ 3871.551986]  [<ffffffff811f81aa>] ? __dentry_kill+0x17a/0x200
  [ 3871.551988]  [<ffffffff811f83b0>] ? dput+0x180/0x1c0
  [ 3871.551989]  [<ffffffff812016b4>] ? mntput+0x24/0x40
  [ 3871.551991]  [<ffffffff811f4bc8>] do_vfs_ioctl+0x2c8/0x4a0
  [ 3871.551992]  [<ffffffff811e285e>] ? ____fput+0xe/0x10
  [ 3871.551994]  [<ffffffff810919ac>] ? task_work_run+0xbc/0xf0
  [ 3871.551995]  [<ffffffff811f4e21>] SyS_ioctl+0x81/0xa0
  [ 3871.551997]  [<ffffffff81787ced>] system_call_fastpath+0x1a/0x1f
  [ 3871.551998] ---[ end trace c466719751b40ad9 ]---
  [ 3874.233994] ------------[ cut here ]------------
  [ 3874.234021] WARNING: CPU: 1 PID: 574 at /build/buildd/linux-3.16.0/drivers/gpu/drm/i915/intel_pm.c:5997 intel_display_power_put+0x14c/0x160 [i915]()
  [ 3874.234022] Modules linked in: ctr ccm ec_sys dm_crypt intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul arc4 ghash_clmulni_intel rfcomm dm_multipath scsi_dh bnep aesni_intel iwlmvm hid_multitouch aes_x86_64 mac80211 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_codec_hdmi snd_hda_codec_realtek iwlwifi snd_hda_codec_generic nfsd rtsx_pci_ms snd_hda_intel auth_rpcgss snd_hda_controller nfs_acl btusb memstick joydev snd_hda_codec nfs lockd snd_hwdep bluetooth snd_seq_midi snd_seq_midi_event sunrpc snd_rawmidi snd_soc_rt5640 6lowpan_iphc fscache snd_soc_rl6231 cfg80211 snd_seq snd_soc_core snd_compress binfmt_misc snd_pcm_dmaengine snd_pcm snd_seq_device tpm_infineon snd_timer lpc_ich dw_dmac dw_dmac_core i2c_hid 8250_dw i2c_designware_platform
  [ 3874.234045]  i2c_designware_core snd shpchp snd_soc_sst_acpi mei_me mei spi_pxa2xx_platform mac_hid soundcore serio_raw parport_pc ppdev lp parport btrfs xor raid6_pq dm_mirror dm_region_hash dm_log mmc_block usbhid hid rtsx_pci_sdmmc i915 i2c_algo_bit rtsx_pci psmouse ahci drm_kms_helper r8169 libahci mii drm wmi sdhci_acpi video sdhci
  [ 3874.234059] CPU: 1 PID: 574 Comm: kworker/1:3 Tainted: G        W I   3.16.0-23-generic #30-Ubuntu
  [ 3874.234060] Hardware name: System76, Inc                    Darter UltraThin/Darter UltraThin, BIOS 4.6.5 10/28/2013
  [ 3874.234074] Workqueue: events edp_panel_vdd_work [i915]
  [ 3874.234075]  0000000000000009 ffff880211d3fd30 ffffffff8177fcbc 0000000000000000
  [ 3874.234077]  ffff880211d3fd68 ffffffff8106fd8d ffff88021008002c 000000000000000b
  [ 3874.234078]  ffff880210088520 ffff88021057e000 ffff880210080000 ffff880211d3fd78
  [ 3874.234080] Call Trace:
  [ 3874.234084]  [<ffffffff8177fcbc>] dump_stack+0x45/0x56
  [ 3874.234087]  [<ffffffff8106fd8d>] warn_slowpath_common+0x7d/0xa0
  [ 3874.234089]  [<ffffffff8106fe6a>] warn_slowpath_null+0x1a/0x20
  [ 3874.234097]  [<ffffffffc026525c>] intel_display_power_put+0x14c/0x160 [i915]
  [ 3874.234109]  [<ffffffffc02c79a4>] edp_panel_vdd_off_sync+0xf4/0x1e0 [i915]
  [ 3874.234120]  [<ffffffffc02c7ac4>] edp_panel_vdd_work+0x34/0x50 [i915]
  [ 3874.234122]  [<ffffffff8108d8e2>] process_one_work+0x182/0x4e0
  [ 3874.234124]  [<ffffffff8108dcab>] worker_thread+0x6b/0x6a0
  [ 3874.234125]  [<ffffffff8178294d>] ? __schedule+0x39d/0x890
  [ 3874.234127]  [<ffffffff8108dc40>] ? process_one_work+0x4e0/0x4e0
  [ 3874.234129]  [<ffffffff81094aeb>] kthread+0xdb/0x100
  [ 3874.234131]  [<ffffffff81094a10>] ? kthread_create_on_node+0x1c0/0x1c0
  [ 3874.234133]  [<ffffffff81787c3c>] ret_from_fork+0x7c/0xb0
  [ 3874.234135]  [<ffffffff81094a10>] ? kthread_create_on_node+0x1c0/0x1c0

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4
  ProcVersionSignature: Ubuntu 3.16.0-23.30-generic 3.16.4
  Uname: Linux 3.16.0-23-generic x86_64
  .tmp.unity.support.test.0:

  ApportVersion: 2.14.7-0ubuntu7
  Architecture: amd64
  BootLog:
   Scanning for Btrfs filesystems
   URfkill[629]: Starting urfkilld version 0.6.0

    * Setting up X socket directories...       [240G
  [234G[ OK ]
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Wed Oct 22 10:41:08 2014
  DistUpgraded: Fresh install
  DistroCodename: utopic
  DistroVariant: ubuntu
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes, including running git bisection searches
  GraphicsCard:
   Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: CLEVO/KAPOK Computer Device [1558:8400]
  MachineType: System76, Inc Darter UltraThin
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-23-generic root=UUID=5aa160f9-0a01-4291-8d9d-704469e9a970 ro acpi_backlight=vendor i915.disable_power_well=0 quiet splash vt.handoff=7
  SourcePackage: xserver-xorg-video-intel
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/28/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4.6.5
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: Darter UltraThin
  dmi.board.vendor: System76, Inc
  dmi.board.version: daru4
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: System76, Inc
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd10/28/2013:svnSystem76,Inc:pnDarterUltraThin:pvrdaru4:rvnSystem76,Inc:rnDarterUltraThin:rvrdaru4:cvnSystem76,Inc:ct9:cvrN/A:
  dmi.product.name: Darter UltraThin
  dmi.product.version: daru4
  dmi.sys.vendor: System76, Inc
  version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.56-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0-0ubuntu3
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0-0ubuntu3
  version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
  xserver.bootTime: Wed Oct 22 08:49:44 2014
  xserver.configfile: default
  xserver.errors: [dix] eGalax Inc. eGalaxTouch EXC7910-1057-13.00.00: unable to find touch point 0
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs: Output                                  HDMI-0
  xserver.version: 2:1.16.0-1ubuntu1
  xserver.video_driver: intel

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