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

[lotuspsychje]

Ubuntu 22.04.2 with kernel HWE-EDGE 6.2.0-25-generic @ 21/7/2023

After update to HWE-EDGE kernel 6.2.0-25-generic my intel flickering has returned

with the same symptons as in previous bug(s) on ubuntu:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1958191

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

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

Ubuntu loads to desktop and after a few seconds the flickering starts
to unusable glitches

This bug dissapears when adding the kernel parameter: i915.enable_dc=0 intel_idle.max_cstate=2

On Ubuntu 22.04 the bug was fixed since kernel 5.17.7-051707-generic #202205121146 (mainline)

and kernel 5.19.0-28-generic

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-6.2.0-25-generic 6.2.0-25.25~22.04.2
ProcVersionSignature: Ubuntu 6.2.0-25.25~22.04.2-generic 6.2.13
Uname: Linux 6.2.0-25-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Fri Jul 21 14:21:38 2023
SourcePackage: linux-signed-hwe-6.2
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

Since you're the author of the original bug, the symptoms are identical and it's a different source package now, we can reuse bug 1958191.