I have a fresh installation of Kubuntu 15.04. Every few boots, it freezes completely during startup with the kubuntu logo showing before the login screen shows, ctrl+alt+F# / ctrl+alt+del do nothing. When that happens, a hard restart helps and it boots normally after that. How can I find out what's wrong?
quiet splash
from/etc/default/grub
settings and runsudo update-grub
, or remove it manually during boot every time in Grub itself. (Lots of instructions everywhere, too long for this comment). Then when it hangs, you have at least the last line. E.g. Network connection fails to start or a service that's blocking the X start. etc.