Comment 70 for bug 1834771

Have you tried the quick workaround linked at post 53?
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1834771/comments/53

Have to note that this bug disappeared on switching to Mint. (Too many bugs trying to get legacy interface using Ubuntu and gnome-panel, finally gave up and left the building.)

It seems this bug is triggered by an adverse interaction between certain components. (Read the foregoing for a list of suspects.) All the same hardware, just change distros and *poof*, problem gone.