PulseAudio Issue
Recently I upgraded to Linux kernel 5.19 (using Debian backports) and updated UEFI firmware. First, there is a kernel error message about unstable tsc clocksource issue, and I added tsc=nowatchdog to kernel parameter (also I added iommu=pt). (This is a bug in Lenovo’s firmware.) However, the audio output from 3.5mm audio jack contains some noise. It is solved after I changed
1 | load-module module-udev-detect |
to
1 | load-module module-udev-detect tsched=0 |
in /etc/pulse/default.pa, but I still don’t know why it works.
Update: My microphone doesn’t work recently, and it works after I reverted this change…