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[Bug 1468232] Re: Font corruption Intel Broadwell graphics


Thanks, Christopher, again for swift reply.

I have tested the following kernels:

While I managed to boot the system (Lenovo t450s), for none of these
cases WLAN worked. Furthermore, problems with building the kernels had
been observed, which seem to be related to the use of Intel Graphics for

During 5 cycles of suspend/resume the problem could not be observed.
However, also for the current default kernel (3.16.0-41-generic) I
observed the problem sometimes to occur less frequently.

Given the fact that the current install is not fully inline with default
14.10 (due to use of Intel Graphics for Linux) and the fact that problem
is not sufficiently frequently reproducible, I suggest that I will
collect further observations and try to install 15.04 asap to eliminate
deviations from standard installation.

For the time being I keep this in state Incomplete.

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  Font corruption Intel Broadwell graphics

Status in linux package in Ubuntu:

Bug description:
  After resume from suspend it often happens that fonts are corrupted.

  WORKAROUND: Set AccelMethod to "uxa".

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: xorg 1:7.7+7ubuntu2
  ProcVersionSignature: Ubuntu 3.16.0-41.57-generic 3.16.7-ckt11
  Uname: Linux 3.16.0-41-generic x86_64

  ApportVersion: 2.14.7-0ubuntu8.5
  Architecture: amd64
  CompizPlugins: [core,composite,opengl,decor,regex,snap,vpswitch,imgpng,compiztoolbox,grid,staticswitcher,mousepoll,move,resize,place,gnomecompat,dbus,animation,expo,ring,workarounds,fade,session,kdecompat,scale]
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  Date: Wed Jun 24 10:16:47 2015
  DistUpgraded: Fresh install
  DistroCodename: utopic
  DistroVariant: ubuntu
   i915-3.19.2-3.16, 1, 3.16.0-41-generic, x86_64: installed
   virtualbox, 4.3.18, 3.16.0-41-generic, x86_64: installed
  ExtraDebuggingInterest: Yes, if not too technical
   Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:5036]
  InstallationDate: Installed on 2015-06-18 (6 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: LENOVO 20BX000XGE
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-41-generic root=UUID=ef80ed28-52d5-4bee-b65c-a543a2b68df4 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/23/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: JBET41WW (1.06 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20BX000XGE
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50510 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: dmi:bvnLENOVO:bvrJBET41WW(1.06):bd12/23/2014:svnLENOVO:pn20BX000XGE:pvrThinkPadT450s:rvnLENOVO:rn20BX000XGE:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20BX000XGE
  dmi.product.version: ThinkPad T450s
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.59-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.1-0intel1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.1-0intel1
  version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1.3
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
  xserver.bootTime: Tue Jun 23 16:15:38 2015
  xserver.configfile: default

  xserver.logfile: /var/log/Xorg.0.log
   product id                                1133
   vendor                                     LGD
  xserver.version: 2:1.16.0-1ubuntu1.3

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