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[chris pollock <1402331@xxxxxxxxxxxxxxxxxx>]

Again another lockup this evening at 19:16:40, 20 Feb 2015. And again
the 'Hangcheck' error did not make itself known, what my syslog shows
for this time period before the CTRL>ALT>F1 is:

Feb 20 19:17:01 localhost CRON[29189]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Feb 20 19:17:28 localhost kernel: [129187.759473] [drm:intel_crtc_cursor_set_obj] cursor off
Feb 20 19:17:28 localhost kernel: [129187.759479] [drm:g4x_check_srwm] SR watermark: display plane 92, cursor 2
Feb 20 19:17:28 localhost kernel: [129187.759481] [drm:g4x_check_srwm] display watermark is too large(92/63), disabling
Feb 20 19:17:28 localhost kernel: [129187.759483] [drm:intel_set_memory_cxsr] memory self-refresh is disabled
Feb 20 19:17:28 localhost kernel: [129187.759485] [drm:g4x_update_wm] Setting FIFO watermarks - A: plane=40, cursor=2, B: plane=2, cursor=2, SR: plane=0, cursor=0
Feb 20 19:17:29 localhost kernel: [129189.173796] [drm:intel_crtc_set_config] [CRTC:9] [FB:47] #connectors=1 (x y) (0 0)
Feb 20 19:17:29 localhost kernel: [129189.173800] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:9], mode_changed=0, fb_changed=1
Feb 20 19:17:29 localhost kernel: [129189.173803] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:VGA-1] to [CRTC:9]
Feb 20 19:17:29 localhost kernel: [129189.173805] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 1, prepare: 1, disable: 0
Feb 20 19:17:29 localhost kernel: [129189.173808] [drm:connected_sink_compute_bpp] [CONNECTOR:13:VGA-1] checking for sink bpp constrains
Feb 20 19:17:29 localhost kernel: [129189.173810] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 24, dithering: 0
Feb 20 19:17:29 localhost kernel: [129189.173812] [drm:intel_dump_pipe_config] [CRTC:9][modeset] config for pipe A
Feb 20 19:17:29 localhost kernel: [129189.173813] [drm:intel_dump_pipe_config] cpu_transcoder: A
Feb 20 19:17:29 localhost kernel: [129189.173814] [drm:intel_dump_pipe_config] pipe bpp: 24, dithering: 0
Feb 20 19:17:29 localhost kernel: [129189.173816] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
Feb 20 19:17:29 localhost kernel: [129189.173817] [drm:intel_dump_pipe_config] dp: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
Feb 20 19:17:29 localhost kernel: [129189.173819] [drm:intel_dump_pipe_config] dp: 0, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
Feb 20 19:17:29 localhost kernel: [129189.173820] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
Feb 20 19:17:29 localhost kernel: [129189.173820] [drm:intel_dump_pipe_config] requested mode:
Feb 20 19:17:29 localhost kernel: [129189.173823] [drm:drm_mode_debug_printmodeline] Modeline 0:"1680x1050" 60 119000 1680 1728 1760 1840 1050 1053 1059 1080 0x48 0xa
Feb 20 19:17:29 localhost kernel: [129189.173824] [drm:intel_dump_pipe_config] adjusted mode:
Feb 20 19:17:29 localhost kernel: [129189.173827] [drm:drm_mode_debug_printmodeline] Modeline 0:"1680x1050" 60 119000 1680 1728 1760 1840 1050 1053 1059 1080 0x48 0xa
Feb 20 19:17:29 localhost kernel: [129189.173829] [drm:intel_dump_crtc_timings] crtc timings: 119000 1680 1728 1760 1840 1050 1053 1059 1080, type: 0x48 flags: 0xa
Feb 20 19:17:29 localhost kernel: [129189.173830] [drm:intel_dump_pipe_config] port clock: 119000
Feb 20 19:17:29 localhost kernel: [129189.173831] [drm:intel_dump_pipe_config] pipe src size: 1680x1050
Feb 20 19:17:29 localhost kernel: [129189.173832] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
Feb 20 19:17:29 localhost kernel: [129189.173834] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
Feb 20 19:17:29 localhost kernel: [129189.173835] [drm:intel_dump_pipe_config] ips: 0
Feb 20 19:17:29 localhost kernel: [129189.173836] [drm:intel_dump_pipe_config] double wide: 0
Feb 20 19:17:29 localhost kernel: [129189.173846] [drm:i9xx_update_primary_plane] Writing base 00546000 00000000 0 0 6720

I have no idea as to whether I should submit a new bug or what. Looking
for some advice here from someone.

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https://bugs.launchpad.net/bugs/1402331

Title:
  System will periodically lockup with [drm:i915_hangcheck_elapsed]
  *ERROR* Hangcheck timer elapsed... render ring idle

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I have noticed the lockups periodically since 09/13/2014. I can't
  remember what kernel version was in use then possibly kernel
  3.13.0-35-generic or -36. It has continued periodically through
  versions -39; -40 and now to -43.  The last time this has happened was
  today Dec 13 14:40:57 localhost kernel: [154858.820009]
  [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... render
  ring idle. At times when it locks up I will have a cursor on a black
  screen and will have to press the power button to restart other times
  it will lockup whenever I'm in an application such as Firefox or
  Evolution. At that time I can usually CTRL>ALT-F1 log in and run 'sudo
  reboot' to restart the system.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-43-generic 3.13.0-43.72
  ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
  Uname: Linux 3.13.0-43-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  chris      2445 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Sat Dec 13 20:22:51 2014
  HibernationDevice: RESUME=UUID=bb329dc0-0642-4b6a-876a-12c2f02fb7f6
  InstallationDate: Installed on 2014-10-24 (50 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  IwConfig:
   eth0      no wireless extensions.

   lo        no wireless extensions.
  MachineType: Dell Inc. OptiPlex 780
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-43-generic root=UUID=4254a7e9-429b-4f53-a08c-ae7ff839b98f ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-43-generic N/A
   linux-backports-modules-3.13.0-43-generic  N/A
   linux-firmware                             1.127.10
  RfKill:

  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/13/2010
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A03
  dmi.board.name: 0C27VV
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.asset.tag: LE0006476
  dmi.chassis.type: 6
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA03:bd02/13/2010:svnDellInc.:pnOptiPlex780:pvr:rvnDellInc.:rn0C27VV:rvrA01:cvnDellInc.:ct6:cvr:
  dmi.product.name: OptiPlex 780
  dmi.sys.vendor: Dell Inc.

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