I got the opportunity to show Colin the behavior in person, and he had a key insight. He asked whether the freeze happens on the reboot after a shutdown, as opposed to an explicit reboot command (e.g. choosing Reboot from the greeter menu).
In my very limited testing so far, it seems to be true that a shutdown->boot does not freeze, while an explicit-reboot does freeze. I'll have to test a few more times to verify, but this is consistent with the previously observed behavior because obviously after a freeze is observed, leaning on the power button results in a successful boot. Colin suggests looking at reboot quirks and fiddling with the reboot parameters to see if something's changed or if there is a workaround. A quick google didn't find anything immediately relevant, but I may do some more (very) background investigation. OTOH, this machine is fairly old and the h/w is mostly limping along as it is, so I'm not particularly motivated to spend much more time on this. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1016170 Title: No login screen unless "quiet splash" removed from boot line To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1016170/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
