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[Chris Bainbridge <chris.bainbridge@xxxxxxxxx>]

*** This bug is a duplicate of bug 1384342 ***
    https://bugs.launchpad.net/bugs/1384342

** This bug has been marked a duplicate of bug 1384342
   kernel messages intel_crtc_wait_for_pending_flips correlate to compiz hang

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https://bugs.launchpad.net/bugs/1401235

Title:
  screen hangs on unity with i915 kernel driver

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  thinkpad x230i with ubuntu 14.10, unity

  Screen hangs ~1/day for 10-20 seconds. i get the following in dmesg afterwards.
  had some screen hangs with 13.10 and 14.04 but they get worse now.

  pressing "ctrl+alt+f1" and waiting for 20 seconds until its a tty1,
  then going back to tty7 "solves" the issue.

  [34078.517253] ------------[ cut here ]------------
  [34078.517316] WARNING: CPU: 3 PID: 1868 at /build/buildd/linux-3.16.0/drivers/gpu/drm/i915/intel_display.c:3324 intel_crtc_wait_for_pending_flips+0x16c/0x180 [i915]()
  [34078.517319] Modules linked in: xt_addrtype xt_conntrack ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack bridge stp llc aufs iptable_filter ip_tables x_tables ctr ccm pci_stub vboxpci(OE) vboxnetadp(OE) snd_hrtimer vboxnetflt(OE) vboxdrv(OE) rc_msi_digivox_ii tda18271 af9013 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic dvb_usb_af9015 dvb_usb_v2 dvb_core rc_core hid_generic rfcomm uvcvideo videobuf2_vmalloc videobuf2_memops bnep videobuf2_core v4l2_common btusb videodev bluetooth media 6lowpan_iphc intel_rapl x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm crct10dif_pclmul crc32_pclmul binfmt_misc ghash_clmulni_intel cryptd arc4 iwldvm mac80211 snd_hda_intel snd_hda_controller usbhid hid snd_hda_codec snd_seq_midi serio_raw snd_seq_midi_event
  [34078.517365]  snd_hwdep snd_rawmidi i915 snd_pcm iwlwifi drm_kms_helper thinkpad_acpi drm cfg80211 nvram mei_me lpc_ich mei shpchp i2c_algo_bit snd_seq wmi snd_seq_device snd_timer snd soundcore video parport_pc mac_hid ppdev coretemp lp parport psmouse e1000e ahci libahci ptp sdhci_pci sdhci pps_core
  [34078.517398] CPU: 3 PID: 1868 Comm: Xorg Tainted: G           OE 3.16.0-25-generic #33-Ubuntu
  [34078.517400] Hardware name: LENOVO 23247PG/23247PG, BIOS G2ET94WW (2.54 ) 04/30/2013
  [34078.517402]  0000000000000009 ffff880212263bf8 ffffffff8178015c 0000000000000000
  [34078.517406]  ffff880212263c30 ffffffff8106fd7d 0000000000000000 ffff8800ca88f000
  [34078.517409]  ffff880210458210 ffff8800c8d07000 ffff8800c8d07000 ffff880212263c40
  [34078.517413] Call Trace:
  [34078.517425]  [<ffffffff8178015c>] dump_stack+0x45/0x56
  [34078.517431]  [<ffffffff8106fd7d>] warn_slowpath_common+0x7d/0xa0
  [34078.517435]  [<ffffffff8106fe5a>] warn_slowpath_null+0x1a/0x20
  [34078.517465]  [<ffffffffc06a804c>] intel_crtc_wait_for_pending_flips+0x16c/0x180 [i915]
  [34078.517472]  [<ffffffff810b9580>] ? prepare_to_wait_event+0x100/0x100
  [34078.517499]  [<ffffffffc06aab13>] intel_crtc_disable_planes+0x33/0x1c0 [i915]
  [34078.517523]  [<ffffffffc06ab0e0>] ironlake_crtc_disable+0x50/0x980 [i915]
  [34078.517551]  [<ffffffffc05b7f53>] ? drm_modeset_lock+0x33/0xf0 [drm]
  [34078.517556]  [<ffffffff81785f42>] ? mutex_lock+0x12/0x30
  [34078.517583]  [<ffffffffc06ac4a7>] intel_crtc_update_dpms+0x67/0xa0 [i915]
  [34078.517610]  [<ffffffffc06b0b19>] intel_connector_dpms+0x59/0x70 [i915]
  [34078.517631]  [<ffffffffc05aee19>] drm_mode_obj_set_property_ioctl+0x399/0x3a0 [drm]
  [34078.517650]  [<ffffffffc05aee50>] drm_mode_connector_property_set_ioctl+0x30/0x40 [drm]
  [34078.517664]  [<ffffffffc059da4f>] drm_ioctl+0x1df/0x680 [drm]
  [34078.517672]  [<ffffffff811f4c28>] do_vfs_ioctl+0x2c8/0x4a0
  [34078.517677]  [<ffffffff811e3201>] ? __sb_end_write+0x31/0x60
  [34078.517682]  [<ffffffff811e0d72>] ? vfs_write+0x1b2/0x1f0
  [34078.517686]  [<ffffffff811f4e81>] SyS_ioctl+0x81/0xa0
  [34078.517691]  [<ffffffff817881ad>] system_call_fastpath+0x1a/0x1f
  [34078.517693] ---[ end trace 30240476cbadcaba ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: linux-image-generic 3.16.0.25.26
  ProcVersionSignature: Ubuntu 3.16.0-25.33-generic 3.16.7
  Uname: Linux 3.16.0-25-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D0p:   k1l        3208 F...m pulseaudio
   /dev/snd/controlC0:  k1l        3208 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Dec 10 20:33:04 2014
  InstallationDate: Installed on 2013-09-28 (438 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Beta amd64 (20130925.1)
  MachineType: LENOVO 23247PG
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-25-generic root=UUID=92d091a1-1d30-461b-a6c2-0910a0da4be3 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-25-generic N/A
   linux-backports-modules-3.16.0-25-generic  N/A
   linux-firmware                             1.138
  SourcePackage: linux
  UpgradeStatus: Upgraded to utopic on 2014-10-15 (56 days ago)
  dmi.bios.date: 04/30/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G2ET94WW (2.54 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 23247PG
  dmi.board.vendor: LENOVO
  dmi.board.version: Win8 Pro DPK TPG
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG2ET94WW(2.54):bd04/30/2013:svnLENOVO:pn23247PG:pvrThinkPadX230:rvnLENOVO:rn23247PG:rvrWin8ProDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 23247PG
  dmi.product.version: ThinkPad X230
  dmi.sys.vendor: LENOVO

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