Comment 13 for bug 487744

I was upgrading 9.10 to 10.04 on my Dell Ubuntu XPS 410s. Am having a similar issue. It appears that the upgrade was either interrupted or hung somewhere in between. Screen was black and not responding to anything after I came back from work. A hard reboot got me to the following:

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

Then, after a couple of minutes:

a bunch of udevd[2815]: SYSFS{} messages saying: "will be removed in a future udev version, please use ATTR{} to match the event device, or ATTRS{}= to match a parent device, in /etc/udev/rules.d/65-libmtp.rules:87"

Then, this intimidating message: "udevd[2815]: specified user 'usbmux' unknown"

And this final line: "os_part has been mounted 27 times without being checked, check forced."

Whatever that process is, it hangs interminably.

Please help with simple, step-by-step solution.

Thanks so much!