[Bug 38688] Re: unable to boot

[Scott James Remnant]

Easiest hack is to put "break=mount" on the kernel command-line.

I don't suppose you have a digital camera (or one in a phone) handy?  If so, could you boot without quiet or splash on the command-line and with break=mount.

(You can edit the command line from the GRUB boot menu if you've never done that before)

You'll get a screen or more full of messages, use shift-pgup and try and take photos of them all and attach them to this bug.
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unable to boot
https://launchpad.net/malone/bugs/38688