Since posting this bug info, I have reinstalled my system and now it works OK for me. This problem is really hard (impossible?) to reproduce, it just sometimes happen. As I wrote, indeed this is probably Plymouth issue, as on forum thread several people confirmed that deactivating it solved the problem.
Can anyone form the bug tracking team suggest what can be done further? Cheers, Jacek -- System sometimes freezes during boot. https://bugs.launchpad.net/bugs/609845 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs