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** Changed in: linux (Ubuntu)
Status: New => Confirmed
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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:
Confirmed
Bug description:
I upgraded from Ubtuntu 17.04 to Ubuntu 17.10 and this bug started appearing
(didn't have this with the versions before).
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 safe inbetween):
* 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
Note: Ubuntu uses kernel version 4.13.0-16-lowlatency for some reason,
but the issue also appears when I boot with the generic version.
I reported already here, but was advised to create a new bug:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1695989/comments/15
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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