i915 kernel module stops working occasionally

[dbacc]

Occasionally my screen gets black. The machine is still alive, can login via ssh.

journalctl -k -b-2 | grep drm
Jul 26 10:22:34 kernel: [drm] Initialized drm 1.1.0 20060810
Jul 26 10:22:34 kernel: [drm] Memory usable by graphics device = 2048M
Jul 26 10:22:34 kernel: fb: switching to inteldrmfb from VESA VGA
Jul 26 10:22:34 kernel: [drm] Replacing VGA console driver
Jul 26 10:22:34 kernel: [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
Jul 26 10:22:34 kernel: [drm] Driver supports precise vblank timestamp query.
Jul 26 10:22:34 kernel: [drm:intel_opregion_init [i915]] *ERROR* No ACPI video bus found
Jul 26 10:22:34 kernel: [drm] Initialized i915 1.6.0 20151010 for 0000:00:02.0 on minor 0
Jul 26 10:22:34 kernel: [drm] GMBUS [i915 gmbus vga] timed out, falling back to bit banging on pin 2
Jul 26 10:22:34 kernel: fbcon: inteldrmfb (fb0) is primary device
Jul 26 10:22:34 kernel: i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
Jul 27 16:25:30 kernel: [drm] stuck on render ring
Jul 27 16:25:30 kernel: [drm] GPU HANG: ecode 6:0:0x85eefffc, in chromium-browse [18427], reason: Ring hung, action: reset
Jul 27 16:25:30 kernel: [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace.
Jul 27 16:25:30 kernel: [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel
Jul 27 16:25:30 kernel: [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue.
Jul 27 16:25:30 kernel: [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it.
Jul 27 16:25:30 kernel: [drm] GPU crash dump saved to /sys/class/drm/card0/error
Jul 27 16:25:30 kernel: drm/i915: Resetting chip after gpu hang
Jul 27 16:36:14 kernel: [drm] stuck on render ring
Jul 27 16:36:14 kernel: [drm] GPU HANG: ecode 6:0:0x85eefffc, in chromium-browse [26940], reason: Ring hung, action: reset
Jul 27 16:36:14 kernel: drm/i915: Resetting chip after gpu hang
Jul 27 17:28:30 kernel: [drm] stuck on render ring
Jul 27 17:28:30 kernel: [drm] GPU HANG: ecode 6:0:0x85eefffc, in chromium-browse [27028], reason: Ring hung, action: reset
Jul 27 17:28:30 kernel: drm/i915: Resetting chip after gpu hang
Jul 27 18:55:17 kernel: [drm] stuck on render ring
Jul 27 18:55:17 kernel: [drm] GPU HANG: ecode 6:0:0x85eecffc, in plasmashell [27304], reason: Ring hung, action: reset
Jul 27 18:55:17 kernel: drm/i915: Resetting chip after gpu hang
Jul 27 18:55:23 kernel: [drm] stuck on render ring
Jul 27 18:55:23 kernel: [drm] GPU HANG: ecode 6:0:0x85eeeffc, in plasmashell [27304], reason: Ring hung, action: reset
Jul 27 18:55:23 kernel: drm/i915: Resetting chip after gpu hang
Jul 27 18:55:29 kernel: [drm] stuck on render ring
Jul 27 18:55:29 kernel: [drm] GPU HANG: ecode 6:0:0x85eefffc, in chromium-browse [27590], reason: Ring hung, action: reset
Jul 27 18:55:29 kernel: drm/i915: Resetting chip after gpu hang
Jul 28 15:24:23 kernel: [drm] stuck on render ring
Jul 28 15:24:23 kernel: [drm] GPU HANG: ecode 6:0:0xbc17ffff, in chromium-browse [29032], reason: Ring hung, action: reset
Jul 28 15:24:23 kernel: drm/i915: Resetting chip after gpu hang
Jul 28 18:04:52 kernel: [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* failed to enable link training
Jul 28 18:04:52 kernel: [drm:intel_dp_link_training_channel_equalization [i915]] *ERROR* failed to start channel equalization

The error Jul 26 10:22:34 kernel: [drm:intel_opregion_init [i915]] *ERROR* No ACPI video bus found happens at every boot

The last two errors coincide with the times the screen gets blank.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: KDE
Date: Fri Jul 29 08:45:47 2016
DistUpgraded: 2016-04-26 11:22:19,544 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py'
DistroCodename: xenial
DistroVariant: kubuntu
ExtraDebuggingInterest: No
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0102] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:2001]
InstallationDate: Installed on 2016-04-12 (107 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-31-generic root=UUID=f93cc9f4-e422-49f0-b9d8-5db514ce0a72 ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to xenial on 2016-04-26 (93 days ago)
dmi.bios.date: 10/07/2011
dmi.bios.vendor: Intel Corp.
dmi.bios.version: BLH6710H.86A.0132.2011.1007.1505
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DH67GD
dmi.board.vendor: Intel Corporation
dmi.board.version: AAG10206-206
dmi.chassis.type: 3
dmi.modalias: dmi:bvnIntelCorp.:bvrBLH6710H.86A.0132.2011.1007.1505:bd10/07/2011:svn:pn:pvr:rvnIntelCorporation:rnDH67GD:rvrAAG10206-206:cvn:ct3:cvr:
version.compiz: compiz 1:0.9.12.2+16.04.20160714-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Fri Jul 29 08:06:24 2016
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input Logitech Logitech USB Keyboard KEYBOARD, id 8
 input Logitech USB Optical Mouse MOUSE, id 9
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:

xserver.version: 2:1.18.3-1ubuntu2.2

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[dbacc (dbacc)]

Seems to only affect Displayport (needed for high resolution). After screen gets black, can switch monitor setting to HDMI. Then screen is showing something again (in FHD resolution). xrandr shows DP as disconnected.

[penalvch (penalvch)]

dbacc, thank you for reporting this and helping make Ubuntu better.

As per https://downloadcenter.intel.com/product/50095 an update to your computer's buggy, insecure, and outdated BIOS is available (0160). When you update to this following https://help.ubuntu.com/community/BIOSUpdate how does this improve the situation?

For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette .

Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful.

Also, you don't have to create a new report.

Once the BIOS is updated, if the problem is still reproducible:
1) Please provide the output of the following terminal command (not perform an apport-collect):
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date
2) Please make a comment specifically advising on how this improves the situation.
3) Please mark this report Status New.

If it's not reproducible, please mark this as Invalid.

Thank you for your help.

[dbacc (dbacc)]

BIOS update seemed to have resolved the issue.