I mentioned a few months ago that Ubuntu 20.04 was unstable on my Lenovo ThinkCentre M920q. 18.04 worked fine, so I kept it on there until development circumstances forced me to upgrade.
I took a gamble that the issue might have been fixed in a point release … but no such luck. Luckily, I came across a thread at Lenovo’s forums where a user discovered that disabling the audio in the BIOS appeared to prevent the random hangs after install. This so far has done the trick for a day or two, although I can’t guarantee it completely. But looks promising!
So now I’m back to working off a nice 8 core ultra SFF PC instead of the older 4 core I was about to switch to. Hooray!