Is this bug only occuring in a virtual setting (e.g. 17.10 to 18.04 in VirtualBox) or also on non-virtual upgrade (from 17.10 to 18.04) ?
Is this bug only occuring in a virtual setting (e.g. 17.10 to 18.04 in VirtualBox) or also on non-virtual upgrade (from 17.10 to 18.04) ?