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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1527832

Title:
  After update, error drm:intel_pipe_config_compare [i915] halts startup

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Today I installed pending updates on my machine and the restarted.  On
  restart, machine stops 5.5 seconds into boot process with the error
  "[drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in
  ips_enabled (expected 1, found 0)"

  I can hop over to a tty login using ctrl-alt-F1 .  The error appears
  there too, but I am able to use the command line.  I cannot start a
  GUI environment.  Sadly as a relative newcomer to Linux I do not know
  enough to tell you if my problem is getting X to start or something
  else entirely.  Typing startx definitely does not help.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-21-generic 4.2.0-21.25
  ProcVersionSignature: Ubuntu 4.2.0-21.25-generic 4.2.6
  Uname: Linux 4.2.0-21-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  Date: Fri Dec 18 21:32:52 2015
  HibernationDevice: RESUME=UUID=1de2aa6c-5e5d-4bd0-8b08-bb9e14510a01
  InstallationDate: Installed on 2015-12-14 (4 days ago)
  InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  MachineType: Google Panther
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-21-generic root=UUID=5c3e08a6-7e53-4f1f-b7c5-8e7ad5b2d78c ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-21-generic N/A
   linux-backports-modules-4.2.0-21-generic  N/A
   linux-firmware                            1.149.3
  SourcePackage: linux
  UpgradeStatus: Upgraded to wily on 2015-12-14 (4 days ago)
  dmi.bios.date: 01/07/2015
  dmi.bios.vendor: coreboot
  dmi.bios.version: 4.0-7883-g3652b0d
  dmi.board.name: Panther
  dmi.board.vendor: Google
  dmi.board.version: 1.0
  dmi.chassis.type: 3
  dmi.chassis.vendor: Google
  dmi.modalias: dmi:bvncoreboot:bvr4.0-7883-g3652b0d:bd01/07/2015:svnGoogle:pnPanther:pvr1.0:rvnGoogle:rnPanther:rvr1.0:cvnGoogle:ct3:cvr:
  dmi.product.name: Panther
  dmi.product.version: 1.0
  dmi.sys.vendor: Google

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