Just experienced the same problem after a 11.10 -> 12.04 update. The 11.10 install was also kubuntu, but don't think it matters.
Disk partitioned as:
(parted) p
Model: ATA HITACHI HTS72323 (scsi)
Disk /dev/sda: 320GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 1049kB 256MB 255MB primary ext2
2 257MB 320GB 320GB extended
5 257MB 320GB 320GB logical
with 5 being a LUKS encrypted LVM setup:
root@ubuntu:/# lvdisplay
--- Logical volume ---
LV Name /dev/cox/root
VG Name cox
LV UUID VRCA0x-HQKI-poSW-2i3E-ECBa-HpR7-xiSREw
LV Write Access read/write
LV Status available
# open 0
LV Size 292.49 GiB
Current LE 74878
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1
--- Logical volume ---
LV Name /dev/cox/swap_1
VG Name cox
LV UUID tRQYQV-Vz8s-gZAF-3M4V-fHtF-aeml-fZhMcj
LV Write Access read/write
LV Status NOT available
LV Size 5.34 GiB
Current LE 1368
Segments 1
Allocation inherit
Read ahead sectors auto
Just experienced the same problem after a 11.10 -> 12.04 update. The 11.10 install was also kubuntu, but don't think it matters.
Disk partitioned as:
(parted) p
Model: ATA HITACHI HTS72323 (scsi)
Disk /dev/sda: 320GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Number Start End Size Type File system Flags
1 1049kB 256MB 255MB primary ext2
2 257MB 320GB 320GB extended
5 257MB 320GB 320GB logical
with 5 being a LUKS encrypted LVM setup: HQKI-poSW- 2i3E-ECBa- HpR7-xiSREw
root@ubuntu:/# lvdisplay
--- Logical volume ---
LV Name /dev/cox/root
VG Name cox
LV UUID VRCA0x-
LV Write Access read/write
LV Status available
# open 0
LV Size 292.49 GiB
Current LE 74878
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1
--- Logical volume --- Vz8s-gZAF- 3M4V-fHtF- aeml-fZhMcj
LV Name /dev/cox/swap_1
VG Name cox
LV UUID tRQYQV-
LV Write Access read/write
LV Status NOT available
LV Size 5.34 GiB
Current LE 1368
Segments 1
Allocation inherit
Read ahead sectors auto
I'll try the fix from #1