Alexander Kops:
1) What is the manufacturer, model, and firmware version of your docking
station?
2) Your recent logs much better confirm the root cause. Hence, could you please
cross post this issue to Intel following their instructions for 1.1-DRM KERNEL
via https://01.org/linuxgraphics/documentation/how-report-bugs ? Please provide
a direct URL to this new report once made so that it may be tracked.
** Changed in: linux (Ubuntu)
Status: Incomplete => Triaged
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https://bugs.launchpad.net/bugs/1727662
Title:
Crashes after unlock: [drm:intel_cpu_fifo_underrun_irq_handler [i915]]
*ERROR* CPU pipe A FIFO underrun
Status in linux package in Ubuntu:
Triaged
Bug description:
After upgrading from Ubtuntu 17.04 to Ubuntu 17.10 this bug started appearing.
When I lock my screen on my Lenovo T450s and the notebook sits in the dock
(two external screens attached), one of the three things happen when I come
back after some time and try to unlock (so it went to power save in-between):
* Most of the time the computer was just shut down and I have to start it
again
* Sometimes the notebook screen flickers weirdly and one of the two other
screens show pixel garbage
* The notebook screen shows the lock screen but is completely frozen.
Occasionally unlocking also works.
The last thing I find in /var/log/syslog is
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO
underrun
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO
underrun
Using or not using the following kernel parameter didn't change anything:
i915.enable_rc6=0
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-4.13.0-16-lowlatency 4.13.0-16.19
ProcVersionSignature: Ubuntu 4.13.0-16.19-lowlatency 4.13.4
Uname: Linux 4.13.0-16-lowlatency x86_64
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: akops 3337 F.... pulseaudio
/dev/snd/controlC0: akops 3337 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct 26 10:44:11 2017
HibernationDevice: RESUME=/dev/mapper/system-swap_1
MachineType: LENOVO 20BWS2YL00
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-16-lowlatency
root=/dev/mapper/system-root ro quiet splash i915.enable_rc6=0
crashkernel=384M-:128M vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.13.0-16-lowlatency N/A
linux-backports-modules-4.13.0-16-lowlatency N/A
linux-firmware 1.169
SourcePackage: linux
UpgradeStatus: Upgraded to artful on 2017-10-20 (5 days ago)
dmi.bios.date: 07/08/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: JBET51WW (1.16 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20BWS2YL00
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrJBET51WW(1.16):bd07/08/2015:svnLENOVO:pn20BWS2YL00:pvrThinkPadT450s:rvnLENOVO:rn20BWS2YL00:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T450s
dmi.product.name: 20BWS2YL00
dmi.product.version: ThinkPad T450s
dmi.sys.vendor: LENOVO
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