Re: my comment #10 - After re-installing the purged packages the problem was, of course, not fixed. However, a fix that does work has been suggested in Bug #1866372:
https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1866372
Re: my comment #10 - After re-installing the purged packages the problem was, of course, not fixed. However, a fix that does work has been suggested in Bug #1866372:
https:/ /bugs.launchpad .net/ubuntu/ +source/ plymouth/ +bug/1866372