intel DRI kernel trace: encoder's hw state doesn't match sw tracking (expected 1, found 0)

[Reece]

See exception in syslog excerpt, attached.

This occurred while reading a USB disk with a (putatively) bad sector. I mention this because there was a suspected interaction between DRI and disk drivers at https://bugzilla.kernel.org/show_bug.cgi?id=66741, although I think comments further down suggest that it was a misleading bisect.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-35-generic 3.13.0-35.62
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: reece 2721 F.... pulseaudio
CurrentDesktop: Unity
Date: Sun Sep 14 10:04:15 2014
HibernationDevice: RESUME=UUID=829a4999-1a29-4ff1-9264-143626b95893
InstallationDate: Installed on 2012-10-09 (704 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
MachineType: Dell Inc. XPS L421X
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic root=UUID=b19be1d6-88a8-4b04-862d-65a6cce9e6ee ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-35-generic N/A
 linux-backports-modules-3.13.0-35-generic N/A
 linux-firmware 1.127.5
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-04-21 (145 days ago)
dmi.bios.date: 06/26/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04
dmi.board.name: 08HDPJ
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A04
dmi.modalias: dmi:bvnDellInc.:bvrA04:bd06/26/2012:svnDellInc.:pnXPSL421X:pvrA04:rvnDellInc.:rn08HDPJ:rvrA00:cvnDellInc.:ct8:cvrA04:
dmi.product.name: XPS L421X
dmi.product.version: A04
dmi.sys.vendor: Dell 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 v3.17 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'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-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/v3.17-rc5-utopic/

[Reece (reece)]

When I figure out how to trigger the bug, I'll test the kernel. The bug is pretty elusive -- most recently occurred only after ~3 days of USB activity.

[Launchpad Janitor (janitor)]

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