Ubuntu
snapd package

  1. Bug #1903367
  2. Comment #3

Comment 3 for bug 1903367

Revision history for this message
Andrei Coada (raziel.kernel) wrote :

Quote:
"it may be related to a kernel issue in this case or even hardware."

I think this is a strong possibility.
The system is hosted on an old Xen hypervisor (although, I've never had this problem before, updating other VMs from 18.04 to 20.04).
Maybe it was a transient quirk. I still was able to finish the update successfully, nevertheless.