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[Warren Turkal <1475729@xxxxxxxxxxxxxxxxxx>]

The following appeared in dmesg after I got that last dmesg.txt:


[  831.299129] Raw EDID:
[  831.299132]  	02 03 1d f1 50 90 05 04 03 02 07 16 01 06 11 12
[  831.299133]  	15 13 14 1f 20 23 09 1f 07 83 01 00 00 02 3a 80
[  831.299134]  	18 71 38 2d 40 58 2c 45 00 81 91 21 00 00 1e 01
[  831.299135]  	1d 80 18 71 1c 16 20 58 2c 25 00 81 91 21 00 00
[  831.299137]  	9e 01 1d 00 72 51 d0 1e 20 6e 28 55 00 81 91 21
[  831.299138]  	00 00 1e 8f 0a d0 8a 20 e0 2d 10 10 3e 96 00 81
[  831.299139]  	91 21 00 00 18 00 00 00 00 00 00 00 00 00 00 00
[  831.299140]  	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e6
[  831.629384] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun
[  833.074178] usb 2-2.3.3: USB disconnect, device number 7


Seems like it'd be useful.

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https://bugs.launchpad.net/bugs/1475729

Title:
  Lots of EDID related back traces.

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I am using the Dell XPS 13 9343. When I plug into a Dell U3014
  monitor, there is a lot of funky behavior. In dmesg I see a ton of
  backtraces. I've attached a dmesg output with the traces.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-22-generic 3.19.0-22.22
  ProcVersionSignature: Ubuntu 3.19.0-22.22-generic 3.19.8-ckt1
  Uname: Linux 3.19.0-22-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  wt         1966 F.... pulseaudio
   /dev/snd/controlC0:  wt         1966 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Jul 17 10:03:59 2015
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-trusty-amd64-20140620-0
  HibernationDevice: RESUME=UUID=25d5c49f-dec3-4600-906b-5942cd316c4e
  InstallationDate: Installed on 2015-04-29 (78 days ago)
  InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary 20140620-04:25
  MachineType: Dell Inc. XPS 13 9343
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-22-generic root=UUID=33afd237-d4ef-43f9-a375-d5693be6aaff ro quiet splash pcie_aspm=force radeon.modeset=0 nouveau.modeset=0 video.use_native_backlight=1 pcie_aspm=force radeon.modeset=0 nouveau.modeset=0 video.use_native_backlight=1 vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-22-generic N/A
   linux-backports-modules-3.19.0-22-generic  N/A
   linux-firmware                             1.143.1
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-04-30 (78 days ago)
  dmi.bios.date: 05/15/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A04
  dmi.board.name: 0310JH
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA04:bd05/15/2015:svnDellInc.:pnXPS139343:pvr01:rvnDellInc.:rn0310JH:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9343
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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