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

[Cassady]

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

[Brad Figg (brad-figg)]

This change was made by a bot.

[penalvch (penalvch)]

Cassady, thank you for reporting this and helping make Ubuntu better.

At your earliest convenience, could you please test the latest upstream kernel available from the very top line at the top of the page from http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D (the release names are irrelevant for testing, and please do not test the daily folder)? Install instructions are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds . This will allow additional upstream developers to examine the issue.

If testing on your main install would be inconvenient, one may:
1) Install Ubuntu to a different partition and then test this there.
2) Backup, or clone the primary install.

If the latest kernel did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this issue is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description:
kernel-fixed-upstream
kernel-fixed-upstream-X.Y-rcZ

Where X, and Y are the first two numbers of the kernel version, and Z is the release candidate number if it exists.

If the mainline kernel does not fix the issue, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-X.Y-rcZ

Please note, an error to install the kernel does not fit the criteria of kernel-bug-exists-upstream.

Once testing of the latest upstream kernel is complete, please mark this report's Status as Confirmed. Please let us know your results.

Thank you for your understanding.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]