"Error probing SMB1" error after upgrade from Karmic to Lucid - os won't boot

[Andrew Mercer]

Hey everyone, hopefully someone can help me out with this one.  I upgraded from Karmic to Lucid last night and after the initial post-upgrade reboot this morning, Ubuntu won't boot - just gives me a few error lines and hangs.  Here are the errors that I see:

mount: mount point /proc/bus/usb does not exist
mountall: mount /proc/bus/usb [431] terminated with status 32
mountall: Filesystem could not be mounted: /proc/bus/usb
fsck from util-linux-ng 2.17.2
/dev/sda1: clean …
[    10.178788] nForce2_smbus 0000:00:0a.1: Error probing SMB1.

I've Googled and tried the Ubuntu help forum - found one solution description that said adding "GRUB_CMDLINE_LINUX="acpi_enforce_resources=lax" to /etc/default/grub (had to create that file) fixes the problem  in several cases, but not in mine.  Anyone have any ideas that might fix this?

Thanks!