[Lenovo ThinkPad X260] Random screen blanks with "CPU pipe B FIFO underrun" error

[Alberto Donato]

On a clean 22.04 install, the screen randomly blanks once in a while for a couple of seconds, then comes back.

I see the following message in dmesg when it happens:

[ 6614.338572] i915 0000:00:02.0: [drm] *ERROR* CPU pipe B FIFO underrun

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-5.15.0-23-generic 5.15.0-23.23
ProcVersionSignature: Ubuntu 5.15.0-23.23-generic 5.15.27
Uname: Linux 5.15.0-23-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu80
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: GNOME
Date: Mon Apr 4 10:16:27 2022
InstallationDate: Installed on 2022-04-03 (0 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Beta amd64 (20220329.1)
MachineType: LENOVO 20F6CTO1WW
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-23-generic root=/dev/mapper/ubuntu-root ro rootflags=subvol=@ quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.15.0-23-generic N/A
 linux-backports-modules-5.15.0-23-generic N/A
 linux-firmware 20220329.git681281e4-0ubuntu1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/08/2019
dmi.bios.release: 1.44
dmi.bios.vendor: LENOVO
dmi.bios.version: R02ET71W (1.44 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20F6CTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.12
dmi.modalias: dmi:bvnLENOVO:bvrR02ET71W(1.44):bd05/08/2019:br1.44:efr1.12:svnLENOVO:pn20F6CTO1WW:pvrThinkPadX260:rvnLENOVO:rn20F6CTO1WW:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20F6_BU_Think_FM_ThinkPadX260:
dmi.product.family: ThinkPad X260
dmi.product.name: 20F6CTO1WW
dmi.product.sku: LENOVO_MT_20F6_BU_Think_FM_ThinkPad X260
dmi.product.version: ThinkPad X260
dmi.sys.vendor: LENOVO

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[tianbingchao (tbc2022)]

I have same problem.
i update to 22.04 from 20.04. i update kernel to 5.15.0-25-generic, still having problem

my computer is thinkpad t480s, connect to external monitor by type-c or thunderbolt 3, both have this kind of problem

[tianbingchao (tbc2022)]

i add kernel param 'intel_iommu=on,igfx_off' three days ago, until now everything is fine

[Miroslav Spehar (mspehar)]

Same thing on HP elite desk 800 g4 with Intel i5 8500t.

[Daniel van Vugt (vanvugt)]

Alberto,

That log message and screen blanking are often associated with insufficient link bandwidth in the monitor cable/connections. Does this relate to an external monitor?

[solax (solax76)]

I have the same issue with Dell Precision 3541 using Ubuntu 22.04 with Wayland.
Video card is NVidia Quadro P620 and I am using propretary drivers with On-demand option.

In my case it is not related with external monitor, it happens with or without an external monitor connected. Sometimes screen start blancking and after moving mouse it stops.

[Daniel van Vugt (vanvugt)]

solax and everyone else: Please open your own bug reports by running:

  ubuntu-bug linux

[Alberto Donato (ack)]

Daniel,

yes I'm using an external monitor via DP. This is the same setup I've been using for a long time with no issue. I've reverted to the Impish kernel (mainly because of an other kernel issue preventing suspend/resume) and that makes the issue disappear.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.