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[Bug 1211394] Re: ThinkPad X201 external screen might blank when connected over displayport.

 

This issue appears to be an upstream bug, since you tested the latest
upstream kernel. Would it be possible for you to open an upstream bug
report[0]? That will allow the upstream Developers to examine the issue,
and may provide a quicker resolution to the bug.

Please follow the instructions on the wiki page[0]. The first step is to
email the appropriate mailing list. If no response is received, then a
bug may be opened on bugzilla.kernel.org.

Once this bug is reported upstream, please add the tag: 'kernel-bug-
reported-upstream'.

[0] https://wiki.ubuntu.com/Bugs/Upstream/kernel

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https://bugs.launchpad.net/bugs/1211394

Title:
  ThinkPad X201 external screen might blank when connected over
  displayport.

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  [   28.560855] Pid: 1422, comm: modprobe Tainted: PF          O 3.8.0-27-generic #40-Ubuntu
  [   28.560855] Call Trace:
  [   28.560861]  [<ffffffff810587ef>] warn_slowpath_common+0x7f/0xc0
  [   28.560863]  [<ffffffff810588ec>] warn_slowpath_fmt+0x4c/0x50
  [   28.560875]  [<ffffffffa07bd182>] intel_wait_for_pipe_off+0xe2/0x1a0 [i915]
  [   28.560886]  [<ffffffffa07bd376>] intel_disable_pipe+0x136/0x170 [i915]

  I'm having this issue on both precise and raring on ThinkPad X201.
  This issue only appears when external display attached to DisplayPort.

  The behavior is consistent with stock/mainline kernel with stock or
  intel linuxgraphics drivers (3.8.0-26-generic, 3.8.0-27-generic,
  3.8.0-27-generic with intel linux-graphics 2013Q2,
  3.10.0-997-generic,3.10.0-997-generic with intel linux-graphics
  2013Q2).

  External display works perfectly on VGA port.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-27-generic 3.8.0-27.40
  ProcVersionSignature: Ubuntu 3.8.0-27.40-generic 3.8.13.4
  Uname: Linux 3.8.0-27-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
  ApportVersion: 2.9.2-0ubuntu8.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  coyang     5192 F.... pulseaudio
  Date: Tue Aug 13 00:09:38 2013
  HibernationDevice: RESUME=UUID=a5e3bbe9-32c8-45b5-bb80-7992a11ee933
  InstallationDate: Installed on 2010-11-08 (1008 days ago)
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  MachineType: LENOVO 3680N48
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: boot=zfs bootfs=rpool/ROOT/raring clocksource=acpi_pm noapic usbcore.autosuspend=1 nmi_watchdog=0 processor.ignore_ppc=1 enable_mtrr_cleanup mtrr_spare_reg_nr=1 pciehp.pciehp_force=1 i915.semaphores=1
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-27-generic N/A
   linux-backports-modules-3.8.0-27-generic  N/A
   linux-firmware                            1.106
  SourcePackage: linux
  UpgradeStatus: Upgraded to raring on 2011-10-10 (672 days ago)
  WifiSyslog:
   Aug 13 00:09:32 coyang kernel: [  905.922614] type=1400 audit(1376323772.402:88): apparmor="ALLOWED" operation="open" parent=10533 profile="/opt/google/chrome/google-chrome//chrome_sandbox" name="/sys/devices/system/cpu/online" pid=10537 comm="nacl_helper_boo" requested_mask="r" denied_mask="r" fsuid=1001 ouid=0
   Aug 13 00:14:41 coyang NetworkManager[3222]: <warn> nl_recvmsgs() error: (-33) Dump inconsistency detected, interrupted
  dmi.bios.date: 10/11/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6QET70WW (1.40 )
  dmi.board.name: 3680N48
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr6QET70WW(1.40):bd10/11/2012:svnLENOVO:pn3680N48:pvrThinkPadX201:rvnLENOVO:rn3680N48:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 3680N48
  dmi.product.version: ThinkPad X201
  dmi.sys.vendor: LENOVO

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