[Lenovo ThinkPad P1 Gen2] Flickering started right after install

[Heather Moon]

My computer is a Lenovo Thinkpad p-Series Gen 2 with Intel Core i9. I've tried updating my grub file as is suggested in Bugs #1970426, #1958191, and #1973676.

That is, I've tried

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_dc=0 intel_idle.max_cstate=2"

And, I've tried cstate=4.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-5.15.0-48-generic 5.15.0-48.54
ProcVersionSignature: Ubuntu 5.15.0-48.54-generic 5.15.53
Uname: Linux 5.15.0-48-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: moon 2093 F.... pulseaudio
 /dev/snd/controlC1: moon 2093 F.... pulseaudio
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Tue Oct 11 08:05:20 2022
InstallationDate: Installed on 2020-03-29 (926 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: LENOVO 20QTCTO1WW
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-48-generic root=UUID=39110848-f164-47a5-bf96-fda0216c46fb ro quiet splash i915.enable_dc=0 intel_idle.max_cstate=2 vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-5.15.0-48-generic N/A
 linux-backports-modules-5.15.0-48-generic N/A
 linux-firmware 20220329.git681281e4-0ubuntu3.5
SourcePackage: linux
UpgradeStatus: Upgraded to jammy on 2022-08-20 (51 days ago)
dmi.bios.date: 05/07/2020
dmi.bios.release: 1.31
dmi.bios.vendor: LENOVO
dmi.bios.version: N2OET44W (1.31 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20QTCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0K17763 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.23
dmi.modalias: dmi:bvnLENOVO:bvrN2OET44W(1.31):bd05/07/2020:br1.31:efr1.23:svnLENOVO:pn20QTCTO1WW:pvrThinkPadP1Gen2:rvnLENOVO:rn20QTCTO1WW:rvrSDK0K17763WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20QT_BU_Think_FM_ThinkPadP1Gen2:
dmi.product.family: ThinkPad P1 Gen2
dmi.product.name: 20QTCTO1WW
dmi.product.sku: LENOVO_MT_20QT_BU_Think_FM_ThinkPad P1 Gen2
dmi.product.version: ThinkPad P1 Gen2
dmi.sys.vendor: LENOVO

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

This change was made by a bot.

[Daniel van Vugt (vanvugt)]

Thanks for the bug report.

Please try adding kernel parameter: i915.enable_psr=0

If that doesn't fix it then please attach a video showing the problem.

[Heather Moon (heatheramoon)]

Hi Daniel
Thanks for the suggestion. Unfortunately, it didn't work either. I've attached a video.

[Daniel van Vugt (vanvugt)]

There is no flickering in that screen recording.

Please take a video using a phone or a camera.

[Heather Moon (heatheramoon)]

Sorry about that. Attached is a video I took with my phone.

[Daniel van Vugt (vanvugt)]

When the problem is happening, please run:

  journalctl -b0 > journal.txt

and attach the resulting text file here.

[Heather Moon (heatheramoon)]

Here's the text file

[Daniel van Vugt (vanvugt)]

If you select 'Ubuntu on Wayland' on the login screen, does the flickering still occur?

[Heather Moon (heatheramoon)]

I don't get that option. I do get 'Ubuntu on xorg' and the flickering still occurs when I select it. Also, the flickering starts as soon as the Ubuntu logo appears before login. I just noticed that as I was waiting to try your suggestion.

[Daniel van Vugt (vanvugt)]

In that case please try selecting the 'Ubuntu' login option and then look at Settings > About to confirm that Wayland is being used. Does the flicker still occur there?

[Heather Moon (heatheramoon)]

Wayland is being used and the flicker occurs.

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

This change was made by a bot.