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["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

** Tags added: latest-bios-0353

** Changed in: xorg (Ubuntu)
   Importance: Low => Medium

** Changed in: xorg (Ubuntu)
       Status: Incomplete => New

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https://bugs.launchpad.net/bugs/1535447

Title:
  Intel Graphics 4K Screen Tearing

Status in xorg package in Ubuntu:
  New

Bug description:
  On a fresh boot all works well, but after an indeterminate amount of
  time the screen starts tearing badly, most noticeably as a permanent
  vertical tear. Once this tearing starts, it affects everything
  (desktop, etc)  but is mostly visible in videos. The only way to get
  rid of the tear is to reboot.

   I do not know where this tearing is occurring, compositor? graphics
  driver?

  Hardware, Intel NUC5i5RYK (integrated graphics), LG 31MU97 DCI 4K
  monitor (4096x2160). Using a Mini DisplayPort to HDMI cable between
  the NUC and monitor.

  00:02.0 VGA compatible controller: Intel Corporation Broadwell-U
  Integrated Graphics (rev 09)

  Software, Kubuntu 15.04 I also see the same problem in 15.10, but the computer I took the video of has 15.04 installed.
  The screen resolution is set to 4096x2160.
   
  In my syslog, I also see tons of these error messages (I dont know if they are related to the tearing). The error message repeats multiple times, and then stops.

  [  668.879288] [drm:gen8_irq_handler [i915_bpo]] *ERROR* The master
  control interrupt lied (SDE)!

  I am hoping I can attach a video to this file which shows the tearing (5.7MB)
  --- 
  ApportVersion: 2.17.2-0ubuntu1.8
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: KDE
  DistUpgraded: Fresh install
  DistroCodename: vivid
  DistroRelease: Ubuntu 15.04
  DistroVariant: kubuntu
  DkmsStatus:
   virtualbox, 4.3.34, 3.19.0-43-generic, x86_64: installed
   virtualbox, 4.3.34, 3.19.0-47-generic, x86_64: installed
  ExtraDebuggingInterest: No
  GraphicsCard:
   Intel Corporation Broadwell-U Integrated Graphics [8086:1626] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Intel Corporation Device [8086:2057]
  InstallationDate: Installed on 2016-01-12 (13 days ago)
  InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  Package: xorg 1:7.7+7ubuntu4
  PackageArchitecture: amd64
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-47-generic.efi.signed root=UUID=cfabd4b7-56e6-40a7-a43a-315a7389748e ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-47.53-generic 3.19.8-ckt10
  Tags: third-party-packages vivid kubuntu
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 3.19.0-47-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 12/22/2015
  dmi.bios.vendor: Intel Corporation
  dmi.bios.version: RYBDWi35.86A.0353.2015.1222.0947
  dmi.board.name: NUC5i5RYB
  dmi.board.vendor: Intel Corporation
  dmi.board.version: H40999-502
  dmi.chassis.type: 3
  dmi.modalias: dmi:bvnIntelCorporation:bvrRYBDWi35.86A.0353.2015.1222.0947:bd12/22/2015:svn:pn:pvr:rvnIntelCorporation:rnNUC5i5RYB:rvrH40999-502:cvn:ct3:cvr:
  version.compiz: compiz N/A
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.60-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.6.0-~0intel1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.6.0-~0intel1
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.3
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
  xserver.bootTime: Tue Jan 26 08:36:27 2016
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                  38 
   vendor                                     AJA
  xserver.version: 2:1.17.1-0ubuntu3.1

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