apport information

** Attachment added: "Lspci.txt"
   https://bugs.launchpad.net/bugs/1658632/+attachment/4862291/+files/Lspci.txt

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Title:
  [drm:intel_pipe_update_end [i915_bpo]] *ERROR* Atomic update failure
  on pipe C

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Xenial:
  Triaged

Bug description:
  Dell XPS 15, Ubuntu 16.04 (Ubuntu 4.4.0-59.80-generic 4.4.35), freshly
  updated. Running BTRFS and nouveau.

  The UI crashes, and put me back to the login screen after 30 seconds.

  This happens when I start softwares based on webkit (stremio, opera,
  chrome, etc). But generally only the first time. After login back and
  starting the program again, it works without crashing.

  The full dmesg error message is:

  [  113.711453] [drm:intel_pipe_update_end [i915_bpo]] *ERROR* Atomic
  update failure on pipe C (start=5158 end=5159) time 130 us, min 1073,
  max 1079, scanline start 1071, end 1080

  Repeated several times.

  I also get a:

  [  762.958586] nouveau 0000:01:00.0: priv: HUB0: 10ecc0 ffffffff
  (1d40822c)

  And a:

  [13925.500344] brcmf_cfg80211_reg_notifier: not a ISO3166 code

  but don't know if it's relevant.
  --- 
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  user       2730 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=UUID=4b156e2d-c1e9-435f-9a56-825b0c577742
  InstallationDate: Installed on 2016-09-20 (206 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  MachineType: Dell Inc. XPS 15 9550
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.8.0-46-generic 
root=UUID=1e6d33f9-ac0e-48bb-b69e-e48ae79db74c ro rootflags=subvol=@ quiet 
splash vt.handoff=7
  ProcVersionSignature: Ubuntu 4.8.0-46.49~16.04.1-generic 4.8.17
  RelatedPackageVersions:
   linux-restricted-modules-4.8.0-46-generic N/A
   linux-backports-modules-4.8.0-46-generic  N/A
   linux-firmware                            1.157.8
  Tags:  xenial xenial
  Uname: Linux 4.8.0-46-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo www-data
  _MarkForUpload: True
  dmi.bios.date: 02/17/2017
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.2.21
  dmi.board.name: 0N7TVV
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.2.21:bd02/17/2017:svnDellInc.:pnXPS159550:pvr:rvnDellInc.:rn0N7TVV:rvrA01:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 15 9550
  dmi.sys.vendor: Dell Inc.

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