I am running Ubuntu 11.10 x86-64 in Virtual Box. While shutting down the last time the system ran normally, it seemed to have hung up, so I just killed the system. When I wanted to boot it again, nothing happened. If I go to recovery mode in GRUB I get following information:

VFS: Cannot open root device "UUID=99532d26-eb6b-43bf-8520-916a85d6a69d" in unknown-block(0,0)

Please append a correct "root=" boot option; here are the available partitions:

0b00         1048575 sr0  driver: sr

Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

Pid: 1, comm:swapper Not tainted 3.0.0-19-generic #33-Ubuntu

As I read in several other boards it seems that GRUB can't find '/'. So I booted from the (virtual) Live-CD and did the following:

sudo mount /dev/sda1 /mnt #according to `sudo fdisk -l` sda1 is my booting partition

sudo mount --bind /dev /mnt/dev

sudo mount --bind /proc /mnt/proc

sudo chroot /mnt

cp -r /usr/lib/x86_64-linux-gnu/pango /usr/lib

update-initramfs -u -k 3.0.0-12-generic

update-grub2 #does not seem to work: Cannot find list of partitions!  (Try mounting /sys.)

Then I rebooted, chose the non-recover entry and nothing happened again. I did this like 3 times and it was the same always.

Hopefully somebody can help me. Thanks in advance!