Public bug reported:
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
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug jammy wayland-session
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https://bugs.launchpad.net/bugs/1967727
Title:
Random screen blanks with "CPU pipe B FIFO underrun" error
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