kernel-packages team mailing list archive

[Jason Gerard DeRose <jason@xxxxxxxxxxxx>]

Public bug reported:

On a 1366x768 Broadwell i3-5010U laptop (System76 Lemur lemu4),
sometimes after I logout there is strange horizontal wrapping/scrolling
corruption at the lightdm login screen plus a fixed vertical wrapping
(see attached video).

After the first time that the screen goes wonky, I see this error in
dmesg:

[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO
underrun

Logging back into to Unity seems to consistently fix the screen
corruption after a few seconds.

This doesn't happen every time you logout, but probably happens 1/3 of
the time or so. Occasionally I'll also see similar corruption during
shutdown right around the time that X stops and Plymouth takes over.

Interestingly, on a Broadwell i3 desktop connected to a 1920x1080
external display via HDMI, I've never encountered this problem. So it
might be related to the specific 1366x768 screen resolution or to the
embedded display port (eDP).

I filed this bug against the kernel because of the dmesg error from the
DRM module... but the problem could just as likely be in xserver-xorg-
video-intel.

For what it's worth, I've tried the latest 4.0 mainline build from the
kernel PPA as well as the 4.1rc1 mainline build, and this problem still
exists with both. I've also tried the slightly updated X packages for
15.04 from the xorg-edgers PPA, and this problem is likewise still
present.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-15-generic 3.19.0-15.15
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  oem        1360 F.... pulseaudio
 /dev/snd/controlC0:  oem        1360 F.... pulseaudio
CurrentDesktop: Unity
Date: Thu Apr 30 10:23:52 2015
HibernationDevice: RESUME=UUID=35ecebc1-3c1c-4a1f-9431-ce62b4803c50
MachineType: System76, Inc. Lemur
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-15-generic root=UUID=395797c2-b33c-46b5-9a64-abfcd6416195 ro acpi_backlight=vendor quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.19.0-15-generic N/A
 linux-backports-modules-3.19.0-15-generic  N/A
 linux-firmware                             1.143
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/25/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 5.6.5
dmi.board.asset.tag: Tag 12345
dmi.board.name: Lemur
dmi.board.vendor: System76, Inc.
dmi.board.version: lemu5
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: System76, Inc.
dmi.chassis.version: lemu5
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.6.5:bd02/25/2015:svnSystem76,Inc.:pnLemur:pvrlemu5:rvnSystem76,Inc.:rnLemur:rvrlemu5:cvnSystem76,Inc.:ct9:cvrlemu5:
dmi.product.name: Lemur
dmi.product.version: lemu5
dmi.sys.vendor: System76, Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug vivid

** Attachment added: "bug.mkv"
   https://bugs.launchpad.net/bugs/1450557/+attachment/4388457/+files/bug.mkv

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https://bugs.launchpad.net/bugs/1450557

Title:
  15.04: Broadwell HD 5500: screen corruption after logout

Status in linux package in Ubuntu:
  New

Bug description:
  On a 1366x768 Broadwell i3-5010U laptop (System76 Lemur lemu4),
  sometimes after I logout there is strange horizontal
  wrapping/scrolling corruption at the lightdm login screen plus a fixed
  vertical wrapping (see attached video).

  After the first time that the screen goes wonky, I see this error in
  dmesg:

  [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A
  FIFO underrun

  Logging back into to Unity seems to consistently fix the screen
  corruption after a few seconds.

  This doesn't happen every time you logout, but probably happens 1/3 of
  the time or so. Occasionally I'll also see similar corruption during
  shutdown right around the time that X stops and Plymouth takes over.

  Interestingly, on a Broadwell i3 desktop connected to a 1920x1080
  external display via HDMI, I've never encountered this problem. So it
  might be related to the specific 1366x768 screen resolution or to the
  embedded display port (eDP).

  I filed this bug against the kernel because of the dmesg error from
  the DRM module... but the problem could just as likely be in xserver-
  xorg-video-intel.

  For what it's worth, I've tried the latest 4.0 mainline build from the
  kernel PPA as well as the 4.1rc1 mainline build, and this problem
  still exists with both. I've also tried the slightly updated X
  packages for 15.04 from the xorg-edgers PPA, and this problem is
  likewise still present.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-15-generic 3.19.0-15.15
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  oem        1360 F.... pulseaudio
   /dev/snd/controlC0:  oem        1360 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Thu Apr 30 10:23:52 2015
  HibernationDevice: RESUME=UUID=35ecebc1-3c1c-4a1f-9431-ce62b4803c50
  MachineType: System76, Inc. Lemur
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-15-generic root=UUID=395797c2-b33c-46b5-9a64-abfcd6416195 ro acpi_backlight=vendor quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-15-generic N/A
   linux-backports-modules-3.19.0-15-generic  N/A
   linux-firmware                             1.143
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/25/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 5.6.5
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: Lemur
  dmi.board.vendor: System76, Inc.
  dmi.board.version: lemu5
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: System76, Inc.
  dmi.chassis.version: lemu5
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.6.5:bd02/25/2015:svnSystem76,Inc.:pnLemur:pvrlemu5:rvnSystem76,Inc.:rnLemur:rvrlemu5:cvnSystem76,Inc.:ct9:cvrlemu5:
  dmi.product.name: Lemur
  dmi.product.version: lemu5
  dmi.sys.vendor: System76, Inc.

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