Comment 3 for bug 1963751

Unfortunately I've already done that on the two affected machines and didn't make a note of the output. I will try to dig out the dpkg logs. As I said, the extra dependency on libopengl0 seemed to be the issue. It's also just possible I took a snapshot or backup so I can roll back and retry - I will have a look.

I seem to recall one machine had had non-security updates disabled after they had previously been enabled, and I initially suspected that had caused the problem, but then it occurred on another machine where that wasn't true.