[Bug 1958191] Re: [i915] Screen flickering in Ubuntu 22.04 (until i915.enable_dc=0 intel_idle.max_cstate=2 are added)

I have the same problem on an Lenovo X260, i7-6500U. Using the
"i915.enable_dc=0 intel_idle.max_cstate=2" workaround has made the
system more stable.

This mostly seems to occur when playing a game in the browser (chrome &
firefox), e.g. chess.com.

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Title:
[i915] Screen flickering in Ubuntu 22.04 (until i915.enable_dc=0
intel_idle.max_cstate=2 are added)

Status in linux package in Ubuntu:
Triaged

Bug description:
Ubuntu 22.04 development branch on kernel 5.15.0-17-generic @
18/1/2022

Booting into desktop gets heavy screen flickering and disforming (unusable)
both booting on xorg and wayland

on kernel 5.13 it did not occur so heavy (only little glitches once in
a while see bug 1948778)

adding the kernel paramater intel_idle.max_cstate=4 fixed this

i had these same bugs on this machine before:

https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/1838644

https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1948778

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-5.15.0-17-generic 5.15.0-17.17
ProcVersionSignature: Ubuntu 5.15.0-17.17-generic 5.15.12
Uname: Linux 5.15.0-17-generic x86_64
ApportVersion: 2.20.11-0ubuntu75
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: lotuspsychje 1201 F.... pipewire-media-
lotuspsychje 1207 F.... pulseaudio
/dev/snd/seq: lotuspsychje 1193 F.... pipewire
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Tue Jan 18 04:22:00 2022
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 8087:0025 Intel Corp. Wireless-AC 9260 Bluetooth Adapter
Bus 001 Device 003: ID 04f2:b59e Chicony Electronics Co., Ltd Chicony USB2.0 Camera
Bus 001 Device 002: ID 046d:c534 Logitech, Inc. Unifying Receiver
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Notebook N7x0WU
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-17-generic root=UUID=a41247d1-3bc3-453e-849a-e07fdcca6201 ro quiet splash intel_idle.max_cstate=4 vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-5.15.0-17-generic N/A
linux-backports-modules-5.15.0-17-generic N/A
linux-firmware 1.204
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/07/2019
dmi.bios.release: 7.13
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 7.13
dmi.board.asset.tag: Tag 12345
dmi.board.name: N7x0WU
dmi.board.vendor: Notebook
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: No Enclosure
dmi.chassis.version: N/A
dmi.ec.firmware.release: 7.14
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr7.13:bd01/07/2019:br7.13:efr7.14:svnNotebook:pnN7x0WU:pvrNotApplicable:rvnNotebook:rnN7x0WU:rvrNotApplicable:cvnNoEnclosure:ct10:cvrN/A:skuNotApplicable:
dmi.product.family: Not Applicable
dmi.product.name: N7x0WU
dmi.product.sku: Not Applicable
dmi.product.version: Not Applicable
dmi.sys.vendor: Notebook

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