[Bug 1756998] Re: GPU HANG: ecode 9:0:0x84dfbffc, in Xorg [1250], reason: Hang on rcs0, action: reset drm/i915: Resetting chip after gpu hang RC6 on

[Grek-336]

** Attachment added: "lspci-vvnn.log"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1756998/+attachment/5084481/+files/lspci-vvnn.log

** Also affects: mesa (Ubuntu)
   Importance: Undecided
       Status: New

** No longer affects: linux (Ubuntu)

** Also affects: libdrm (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  GPU HANG: ecode 9:0:0x84dfbffc, in Xorg [1250], reason: Hang on rcs0,
  action: reset  drm/i915: Resetting chip after gpu hang RC6 on

Status in libdrm package in Ubuntu:
  New
Status in mesa package in Ubuntu:
  New

Bug description:
  This error message is in syslog when the Desktop freeze before the
  Display goes black and the login screen came up.

  This apparently happens without any apparent connection. Sometimes not
  for days even though the CPU is 100% full all the time, then again
  after 20-30 minutes several times in a row.

  lsb_release -rd
  Description:	Ubuntu 16.04.4 LTS
  Release:	16.04

  mesa 17.2.8-0ubuntu0~16.04.1
  libdrm 2.4.83-1~16.04.1

  
  Mar 19 20:12:22 michael-ThinkPad-E470 kernel: [255789.072708] [drm] GPU HANG: ecode 9:0:0x84dfbffc, in Xorg [1250], reason: Hang on rcs0, action: reset
  Mar 19 20:12:22 michael-ThinkPad-E470 kernel: [255789.072763] drm/i915: Resetting chip after gpu hang
  Mar 19 20:12:22 michael-ThinkPad-E470 kernel: [255789.073059] [drm] RC6 on
  Mar 19 20:12:30 michael-ThinkPad-E470 kernel: [255797.047275] drm/i915: Resetting chip after gpu hang
  Mar 19 20:12:30 michael-ThinkPad-E470 kernel: [255797.047556] [drm] RC6 on
  Mar 19 20:12:43 michael-ThinkPad-E470 kernel: [255810.039289] drm/i915: Resetting chip after gpu hang
  Mar 19 20:12:43 michael-ThinkPad-E470 kernel: [255810.039429] [drm] RC6 on
  Mar 19 20:12:55 michael-ThinkPad-E470 kernel: [255822.007247] drm/i915: Resetting chip after gpu hang
  Mar 19 20:12:55 michael-ThinkPad-E470 kernel: [255822.007407] [drm] RC6 on
  Mar 19 20:13:03 michael-ThinkPad-E470 kernel: [255830.071164] drm/i915: Resetting chip after gpu hang
  Mar 19 20:13:03 michael-ThinkPad-E470 kernel: [255830.071304] [drm] RC6 on
  Mar 19 20:13:25 michael-ThinkPad-E470 gnome-session-binary[31279]: Entering running state

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