Finally fixed my PC’s persistent graphics and audio stutters
Microsoft made a TPM version 2.0 module a requirement to run Windows 11. I had to audit my Linux installation to verify this, but it isn’t set up to use the TPM at all. I don’t understand how the fTPM should affect Linux, but its presence might cause some stability issues somewhere in the system. It could also have been introduced by the very mainboard firmware update that was supposed to address the issue.
I removed the hardware TPM, and the stuttering immediately got worse in both Linux and Windows.