Was logged on to my 22.04.4 system when a dialog popped up asking if I wanted an upgrade to 24.04 noble numbat. 22.04 had been working great for months. The upgrade ran with no obvious errors. The 24.04 system freezes (black screen, unresponsive mouse cursor) as soon as I enter my password to logon. Suspect the OS is crashing and rebooting because the logon prompt re-appears after 15 minutes or so.
System is an HP Omen, 32GB mem, two drives - 256GB SSD & 2TB conventional drive. The SSD contains the obligatory boot partition plus a 250GB+ partition containing the root file system. The conventional drive contains a single 2TB partition and mounts at /home.
Kinda looks like noble numbat is running amok trying to access /home.