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[Özgür Caner <oc@xxxxxxxxx>]

Since the latest kernel update (  3.19.0-18-generic ) on vivid, regular
ubuntu installation updated from trusty, I experience the mentioned
issue but with different results.

Unity desktop and Xorg are running without any issues, but I've no sound
output via HDMI/DP, which was available with the previous kernel.

** Attachment added: "dmesg output"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1435898/+attachment/4401906/+files/dmesg.txt

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https://bugs.launchpad.net/bugs/1435898

Title:
  [KDE5 Session] Intel driver oops message: invalid max DP link bw val
  0, using 1.62Gps

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Kubuntu 15.04 start without problems to the display manager sddm. If I
  enter my password the display is blank for a second and then does
  kubuntu load forever the desktop environment.

  Dmesg shows several oopses in the intel driver:

  invalid max DP link bw val 0, using 1.62Gps

  and

  compute-config() on unknown output!

  I think this problem occurs since the update to 3.19.0-9.

  Kernel 4.0-rc5 tested with the same problem.
  ---
  ApportVersion: 2.16.2-0ubuntu4
  Architecture: amd64
  DistroRelease: Ubuntu 15.04
  HibernationDevice: UUID=3383b02e-b89c-462c-903a-cb936e81b2bf
  InstallationDate: Installed on 2014-12-21 (93 days ago)
  InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20141218)
  MachineType: LENOVO 20354
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-10-generic root=UUID=b549945a-67ac-4d14-849c-b54e561d47cc ro xforcevesa quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-10-generic N/A
   linux-backports-modules-3.19.0-10-generic  N/A
   linux-firmware                             1.143
  Tags:  vivid vivid
  Uname: Linux 3.19.0-10-generic x86_64
  UnreportableReason: The report belongs to a package that is not installed.
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 10/20/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 9BCN29WW
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Lancer 5A5
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900058WIN
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo Z50-70
  dmi.modalias: dmi:bvnLENOVO:bvr9BCN29WW:bd10/20/2014:svnLENOVO:pn20354:pvrLenovoZ50-70:rvnLENOVO:rnLancer5A5:rvr31900058WIN:cvnLENOVO:ct10:cvrLenovoZ50-70:
  dmi.product.name: 20354
  dmi.product.version: Lenovo Z50-70
  dmi.sys.vendor: LENOVO

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