I’m trying to figure out if I’m having audio issues related to the Level1 KVM (the new single monitor displayport 1.4).
My setup is a Windows PC with displayport 1.4 (from club3d) and a 3.5mm audio running into the KVM for #1 and a Lenovo T480s running Fedora 31 connected using the Caldigit USB C Pro dock (that supports thunderbolt) connected to #2.
Windows has no trouble with audio or video, but with Fedora after I plugged in a 3.5mm from the Caldigit dock to the KVM, pulseaudio seems to get stuck. Launching pavucontrol gets stuck on “Establishing connection to PulseAudio. Please wait”.
Up until I connected the audio from my dock to the KVM, pulseaudio would work fine and I could get audio from my laptop. Now I can’t get anything.
dmesg spits out a couple of the following:
usb 3-1.4.2.1.1: 5:2: cannot get min/max values for control 2 (id 5)
followed by continuous lines of the following over time:
usb 3-1.4.2.1.1: 3:1: cannot set freq 16000 to ep 0x83
Seems like an issue with audio coming over the thunderbolt 3 dock, but I’d hooked it up to a speaker directly and had it working before, so not sure what might have changed.