Ubuntu 10.04 doesn't boot after upgrade from 9.10

I just upgraded from Ubuntu 9.10 to 10.04 and immediately had some problems with booting after a restart.

Here is a video but I will explain it anyway:
http://www.youtube.com/watch?v=aEr7glFLf48

The font changed suddenly during startup, and then the screen flashed, and the logo appeared but then became what I would call pixelated. Then all I got was a black screen and it just hung there.

Did a hard restart and entered the GRUB loader and chose Ubuntu 10.04 kernel 2.6.31-21 instead of Ubuntu 10.04 kernel 2.6.32-22 and it came up with this message which hung there long enough for me to snap a photo:

mount: mounting none on /dev failed: No such device092b3250a
chroot: cannot execute /etc/apparmor/initramfs: No such file or directory.

Then, just as I thought it would hang there forever, it started to fill the screen with commands (yay, it's doing something!!), which I couldn't copy down, and eventually started up and is working fine. However: If I start it up normally it will never never boot. I always have to enter GRUB and choose the other option.

And who knows when this tactic will stop working?

Finally!!

Someone with the same problem! Actually, in my case I had been running Lucid for nearly a week and suddenly in the middle of my work the screen flashes and crashes... when I move my mouse it'll flash for a moment.

If you go into recovery mode from the grub bootloader and select "failsafe graphics mode" it'll load in a low resolution (don't try to fix it, just continue for the session). when you get into the monitor settings, you'll notice that it's not detecting any monitors.

They're messing with the Nvidia drivers, so if you have a Nvidia card, that's probably what it is! I'd wait for the next kernel update and try that... there's probably also a way to set it to automatically load that kernel and deal with the slow boot... but if you find something else, do tell!

Also, you should try the official Ubuntu forums, you're more likely to get an answer there! :)

Nvidia drivers...

You are right about drivers, not only in Ubuntu... on my desktop 185 did not work, nouveau does random puzzle to the screen using picture from ram of the card leftovers (1GB GF 9500 GT) and I was left in arms of MS again...

I have the same thing

With an older fujitsu laptop with onboard Intel video chipset.
Works fine if failsafe graphics mode.
Anyone know how I can set it to automatically boot to failsafe graphics mode?
Thaks.