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I had to shutdown a server due to a power outage... The machine's been working just fine, an Ubuntu 12.04 box. Now when I boot back up, I get the GRUB 1.99 boot menu with several options, all of which result in a blinking cursor for ~15 seconds, then reboots. There's no sign that anything's wrong, and I'm not familiar enough with the common troubleshooting steps to take to identify the issue. I suspect it's some sort of GRUB update problem (an update to GRUB may have been installed, and pending a reboot, which I just did). For further info, this is the GRUB boot config for the standard boot option:

set params 'Ubuntu, with Linux 3.2.0-32-generic'

gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set=root LONGUUID
linux /vmlinuz-3.2.0-32-generic root=/dev/mapper/k2-root ro quiet $vt_handoff
initrd /initrd.img-3.2.0-32-generic

Any ideas on what I can try would be great help!

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Solved my own problem!

Turned out somehow during a Grub update (or a previous partitioning of the disk) changed the default root partition in Grub to use hd0,msdos, which isn't actually correct. We found out on the Grub console that the root partition is merely 1, so changing that fixed the issue.

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