Comment 5 for bug 1959041

So, now I could find a little more detail about my issue:

I tested with other mainline kernel from 5.15 series and the problem started with 5.15.5

And it is also present on 5.15.10 and 5.15.24 (thats what I have also tested)

STR works with 5.15.0, 5.15.3, 5.15.4 (thats what I have tested)

After knowing the version I could find this on the net:

https://www.reddit.com/r/pop_os/comments/radfeg/psa_kernel_5155_and_intel_6th_gen_cpus_issue_with/

And so after adding intel_iommu=off as kernel option STR works also with linux-image-5.15.0-18-generic