Comment 24 for bug 1973434

Like everyone else, I am experiencing the same issues. "intel_iommu=off" in Grub does not help.

Here are some symptoms I suffer; not sure if they are related to this bug or not, but worth mentioning since they all degrade my Ubuntu experience since I upgraded from 20.04 to 22.04.

- Overall stuttering; Alt-tab, switch workspace or switch to another application by selecting it and typing lags a few 100ms.
- Gnome animations are not smooth.
- Video stuttering and tearing with any piece of software (VLC, Chrome, Xine...). Have a Skylake GT2 [HD Graphics 520]. Is hardware acceleration enabled? I have no clue how to figure this out.
- gnome-shell always running at more than 6% CPU, jumping often up to 20%, under Xorg. It was way worse when under Wayland. Lets say the average is about 11% CPU.
- System is "frozen" for 5s every time it wakes up from Suspend to RAM (S3). Under 20.04, response was instantaneous. You can move the mouse during that 5s period, but nothing responds to the keyboard or mouse buttons.

This is after an upgrade from 20.04 to 22.04.1. I am running Xorg because when running Wayland, gnome-shell would always be >20% CPU.

My CPU profile is always set at "High Performance" and my CPU clock is always around 2.7x GHz.

System: Dell Latitude E7470 (2016), Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz, Skylake GT2 [HD Graphics 520], 32 GiB Ram, 1 TiB SSD, 1900x1080 screen.