Intel DRM pipe state mismatch on boot, intermittent kernel panics during video playback

[Russell Neches]

Kernel throws this stack trace on boot :

[drm:intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0)
[ 3.334802] ------------[ cut here ]------------
[ 3.334813] WARNING: CPU: 0 PID: 281 at /build/linux-AxjFAn/linux-4.2.0/drivers/gpu/drm/i915/intel_display.c:12326 check_crtc_state+0x2c5/0x440 [i915]()
[ 3.334814] pipe state doesn't match!

Various glitches follow, such as random X11 crashes and kernel panics during video playback.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-16-generic 4.2.0-16.19
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: russell 1943 F.... pulseaudio
 /dev/snd/controlC0: russell 1943 F.... pulseaudio
CurrentDesktop: GNOME
Date: Thu Nov 5 14:59:40 2015
HibernationDevice: RESUME=UUID=6b764e3b-eb83-49b8-8c2b-fdc5f3d0e813
InstallationDate: Installed on 2014-10-24 (377 days ago)
InstallationMedia: Ubuntu-GNOME 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 03eb:8a0c Atmel Corp.
 Bus 001 Device 003: ID 1bcf:2987 Sunplus Innovation Technology Inc.
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: ASUSTeK COMPUTER INC. UX301LAA
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic.efi.signed root=UUID=4003d6a9-b84a-48f7-a5c2-6dadaad97778 ro quiet splash acpi_osi= cie_aspm=force drm.vblankoffdelay=1 i915.semaphores=1 nmi_watchdog=0 vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-16-generic N/A
 linux-backports-modules-4.2.0-16-generic N/A
 linux-firmware 1.149.1
SourcePackage: linux
UpgradeStatus: Upgraded to wily on 2015-05-08 (181 days ago)
dmi.bios.date: 06/05/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX301LAA.211
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX301LAA
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrUX301LAA.211:bd06/05/2015:svnASUSTeKCOMPUTERINC.:pnUX301LAA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX301LAA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: UX301LAA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.3 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.3-unstable/