I was running Xubuntu 14.04 LTS, and received 16.04.1 upgrade notify recently, so I did an upgrade.
During the upgrade process some error prompted that "init" does not found or something, but I didn't pay much attention (plus it only gives me a "close" button).
The first time upgrade process tried to reboot, it stops at a blank screen with a non-blinking cursor on upper left. After waiting for quite some time, I did a hard reboot, and then my system hangs at here:
Target filesystem doesn't have requested
Kernel panic - not syncing: Attempted to kill
In GRUB's advance menu I can choose these entries:
default, which actually is
upstart, which boots into Xubuntu's GUI loading screen, but just that. Pressing Esc and I can see that it stops at
Starting cups-browsed - Bonjour remote printer browsing daemon [ OK ]
NumLock works, cursor blinking, but nothing else;
recovery_mode, which boots exactly like
Choosing older kernels in GRUB's advance option doesn't make any better: for
recovery-mode they didn't make any difference; for
upstart they stops at a black-and-white screen loading 15.10 (which I never installed).
I've read question #651974, question #92946, but it doesn't seem to help.
Someone already posted a similar question with no answer (currently).
Anyway to fix this?