[kubuntu] Computer won't boot anymore, /dev/shm and /boot won't mount

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http://ubuntuforums.org – My computer's no longer booting. I rebooted because of a kernel update after 12 days of uptime, and for seemingly no reason I now get this error: I usually get an error saying /dev/shm is already mounted, but it continues booting, but now nothing is booting! At first, it said /dev/sdb5 (/) and /dev/sda1 (/home) where corrupt and fsck couldn't do anything, so I booted into a live CD and repaired the filesystems with fsck, and it worked, but my computer still isn't booting. It just hangs as you see in the screenshot. I am not able to choose any options when it says: Code: keys (Hardware)