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[Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>]

Verified with 3.16.4-031604-generic #201410051735 kernel
Error message:
[   85.542354] nouveau E[Xorg[2263]] failed to idle channel 0xcccc0000 [Xorg[2263]]
could be seen when this happens.

** Attachment added: "dmesg-3.16.log"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1378744/+attachment/4228381/+files/dmesg-3.16.log

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https://bugs.launchpad.net/bugs/1378744

Title:
  nVidia GK106GLM [Quadro K2100M] [10de:11fc] Connect to HDMI / DP port
  with open-source driver will cause Xorg crash

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  CID: 201305-13527 Dell Precision M4800

  Xorg would crash and restart (you will see the login screen again and
  again) when the HDMI / DP cable is connected to the system.

  Steps:
  1. Install 14.04 + update (3.13.0-36), boot to desktop
  2. Connect a HDMI / DP cable

  Expected result:
  * The external monitor should work

  Actual result:
  * The external monitor screen is black, and the Xorg crashed -> black screen on this laptop -> login screen shows up -> black screen... repeat.

  WORKAROUND:
  * Install the proprietary nvidia driver

  I'm not sure if this should be consider as a blocker.
  But hey, we need to certified this I+N system with the proprietary driver, I think it's OK to not to call this a blocker.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-36-generic 3.13.0-36.63
  ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
  Uname: Linux 3.13.0-36-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     7071 F.... pulseaudio
                        ubuntu     7529 F.... pulseaudio
   /dev/snd/controlC1:  ubuntu     7071 F.... pulseaudio
                        ubuntu     7529 F.... pulseaudio
  CRDA:
   country TW:
   	(2402 - 2472 @ 40), (3, 27)
   	(5270 - 5330 @ 40), (3, 17), DFS
   	(5735 - 5815 @ 40), (3, 30)
  CurrentDesktop: Unity
  Date: Wed Oct  8 06:20:44 2014
  HibernationDevice: RESUME=UUID=46ed949d-eff8-48e9-b337-6425f480cf12
  InstallationDate: Installed on 2014-10-08 (0 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Dell Inc. Precision M4800
  ProcFB:
   0 inteldrmfb
   1 nouveaufb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-36-generic.efi.signed root=UUID=e7f55d08-44a4-447e-8fc6-563864d60df4 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-36-generic N/A
   linux-backports-modules-3.13.0-36-generic  N/A
   linux-firmware                             1.127.7
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/02/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A06
  dmi.board.name: 0FVDR2
  dmi.board.vendor: Dell Inc.
  dmi.board.version: X02
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA06:bd01/02/2014:svnDellInc.:pnPrecisionM4800:pvr01:rvnDellInc.:rn0FVDR2:rvrX02:cvnDellInc.:ct9:cvr:
  dmi.product.name: Precision M4800
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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