Just to try, I closed the laptop lid, and removed my wired lan connection.
This morning as I opened the lid, the screen was hung.
Mouse worked, but screen was stuck with the LAN connection shown as connected.
Inferences:
The system possibly hangs when lid is closed and some hardware change occurs. (Like unplugging lan, unplugging power supply, switching off power supply, etc..)
Latest Update:
Ubuntu crashed with classic desktop as well!
Just to try, I closed the laptop lid, and removed my wired lan connection.
This morning as I opened the lid, the screen was hung.
Mouse worked, but screen was stuck with the LAN connection shown as connected.
Inferences:
The system possibly hangs when lid is closed and some hardware change occurs. (Like unplugging lan, unplugging power supply, switching off power supply, etc..)
So not a Unity issue after all.