Hi.
I've been using Ubuntu for a few years now and never had this sort of thing happen before ever.
After I let system auto update this morning when I rebooted this happened, see text from black screen it's stuck at.

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could not write bytes: Broken pipe
*Starting disk temperature monitoring daemon hddtemp; [OK]
speech-dispatcher disabled; edit /etc/default/speech-dispatcher
sand disabled; edit / etc/default/saned
*Stopping cold plug devices [OK]
*Stopping log initial device creation ]OK]

*Starting configure network device security [OK]
*Starting configure vitual network devices [OK]
*Starting save udev log and update rules [OK]
*Stopping configure vitual network devices [OK]
*Stopping save udev log and update rules [OK]
*Starting anac(h)ronistic cron [OK]
*Stopping anac(h)ronistic cron [OK]
*Checking battery state... [OK]
*Stopping System V runlevel compatibility [OK]
*Starting Mount network filesystems [OK]
*Stopping Mount network filesystems [OK]

with BLINKING CURSOR _at end

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Now how to fix this and get it back to normal running again.