Fresh Ubuntu 12.04.1 amd64 install with the following partition layout / lvm setup:
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 243M 0 part /boot
├─sda2 8:2 0 1K 0 part
└─sda5 8:5 0 19.8G 0 part
├─u1204--64-swap_1 (dm-0) 252:0 0 1020M 0 lvm [SWAP]
├─u1204--64-root (dm-1) 252:1 0 7.6G 0 lvm /
└─u1204--64-usr--local (dm-2) 252:2 0 11.1G 0 lvm /usr/local
The installation works as expected and there are no imminent issues during normal usage.
The issue is with the recovery menu. If someone boots into a rescue entry in the boot menu the rescue menu appears as expected but all entries that remount the root volume rw will hang on mountall.
Fresh Ubuntu 12.04.1 amd64 install with the following partition layout / lvm setup: -64-swap_ 1 (dm-0) 252:0 0 1020M 0 lvm [SWAP] -64-usr- -local (dm-2) 252:2 0 11.1G 0 lvm /usr/local
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 243M 0 part /boot
├─sda2 8:2 0 1K 0 part
└─sda5 8:5 0 19.8G 0 part
├─u1204-
├─u1204--64-root (dm-1) 252:1 0 7.6G 0 lvm /
└─u1204-
The installation works as expected and there are no imminent issues during normal usage.
The issue is with the recovery menu. If someone boots into a rescue entry in the boot menu the rescue menu appears as expected but all entries that remount the root volume rw will hang on mountall.