[Bug 1727662] Re: [Lenovo ThinkPad T450s] Issues after docking and locking: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun

** Tags removed: latest-bios-1.30
** Tags added: bios-outdated-1.35

** Changed in: linux (Ubuntu)
Status: Confirmed => Triaged

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Title:
[Lenovo ThinkPad T450s] Issues after docking and locking:
[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A
FIFO underrun

Status in Linux:
Invalid
Status in linux package in Ubuntu:
Triaged

Bug description:
What happens is after I dock my laptop into a Lenovo ThinkPad Ultra Dock Type 40A2 20V, lock it via clicking the lock icon, and wait ~30 minutes, one of the following three things happen ~50% of the time when I come back to unlock it:
* Most of the time the computer is found shut down.
* Sometimes the notebook screen flickers weirdly and one of the two external monitors show pixelation.
* The notebook screen shows the lock screen but is completely frozen. Occasionally unlocking works.

I have two external monitors attached to the docking station.

When I dock my laptop, the battery indicator does recognize its
charging.

I've not seen this issue when:
1) With the laptop in the dock, while actively using the laptop.
2) With the laptop out of the dock and no external monitors present.

This bug started after upgrading from Ubtuntu 17.04 to Ubuntu 17.10.

Using or not using the following kernel parameter didn't change anything:
i915.enable_rc6=0

Updated docking station firmware to latest 2.33.00.

PC temperatures are normal as per lm-sensors.

20171109 - Not reproducible testing drm-tip for 1.5 days.

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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