Here is a video of it - https://streamable.com/n8bi4k (expires in two days)
Yes, the mouse pointer is actually that slow during the time it happens. I managed to open Btop++ so show what was currently running and what process where.
Just to add, this issue also happend for me on EOS. So it seems to be a persistent issue for me, I’m just at a loss what to do.
EDIT: To clarify. I’ve got to reboot, it refuse to stop lagging.
I’ve been having occasional extreme screen lag like that on a very similar laptop until I’ve added amdgpu.dcdebugmask=0x10 to kernel parameters, which disables PSR (panel self-refresh) support in AMD driver. While that feature is supposed to help conserve energy, in my experience it ended up causing too many various hard to diagnose problems (including lag like this, screen getting stuck black after login, and even full-screen artifacting on 6.12 kernels) to be worth it.
Yes, I do use BTRFS with Snapper now, but on EOS I used Timeshift. So I don’t think it have anything to do with them, since else a lot of people would have the same issue.
But I would gladly have a recommendation for your home folder
I have now run with the kernel setting suggestion from @eritheswitch and its been working great. After 5 days and haven’t experienced any issues. It all points towards the AMD Driver being wonky in the kernel, so I wonder what in the Linux kernel is causing issues.
Except the only issue I have is that KDE some times boot up black but Discord, Telegram etc. boots fine. But its just to reboot the PC via opening a terminal so its not the end of world. Only happened two times.