12.04 Upgrade Issue

[Ebonhawke]

Upgraded my desktop from 10.04 to 12.04 tonight (Linux only computer). Upgrade process didn't show any error messages (although last screen was gibberish - just clicked on what looked like 'OK', and it completed)

When I restarted the computer, I got a purple 10.04 screen saying that / drive hadn't been mounted, and 'Continue, S to skip mounting, M for manual'

Thoughts?

[Ebonhawke]

If I just 'continue', the computer sits there, with 'skip', it gives an error message (sorry, don't have a screen capture), and M sends me to a terminal window

(Tried sudo apt-get -f install, sudo apt-get upgrade etc. gave me warnings and errors)

[Ebonhawke]

To clarify

When I try to boot the machine with 12.04, I get a purple screen with four white dots and the message

"The disk drive for / is not ready or not present"

When I press 'M' for Manual Recovery, and try sudo apt-get update, I get

W: Not using locking for read only lock file /var/lib/dpkg/lock
E: Unable to write to /var/cache/apt
E: The package lists or status file could not be parsed or opened.

[Ebonhawke]

After doing a search on Google, found a similar issue

The fix for that was

mount -n-o remount,rw /
dpkg --configure-a

Tried that, and seemed to at least do 'something', however it aborted because of too many errors. I tried apt-get update/upgrade etc, but no dice.

Also, tried looking at reinstalling 9.04 from LiveCD, but it's not loading the language selection screen, so won't let me continue onwards

*bangs head on keyboard*

[Ebonhawke]

When I do the apt-get install -f, I get a series of error messages that look similar to:

http://us.archive.ubuntu.com precise replease.gpg
Could not resolve 'us.archive.ubuntu.com'

[BicyclerBoy]

That prob means no network connection..

During boot process the filesystem is first mounted read only until some point & is then remounted..

Was your 10.04 fully updated before attempting upgrade to 12.04LTS?
Around 10.04 there were problems/changes with grub & then changes to using UUID partition labels..
Some people may have never resolved these..

sudo blkid -o full -s UUID
(lets you see the device & UUID of each partition)

But your problem seems to be with plymouth (greeter) handing over to X server.

dmesg | tail -n 20

Higher Risk:
sudo update-grub