Comment 3 for bug 779912

I'm also affected by the bug, I'm using the same encrypted home directory since at least 10.04.

Here are a few lines from syslog that may be relevant (as far as I understand what's happening) :
May 9 21:01:31 schambrin-laptop kernel: [ 16.555026] Intel AES-NI instructions are not detected.
May 9 21:01:31 schambrin-laptop kernel: [ 16.565269] padlock_aes: VIA PadLock not detected.
May 9 21:01:31 schambrin-laptop kernel: [ 16.584529] padlock_sha: VIA PadLock Hash Engine not detected.
May 9 21:01:31 schambrin-laptop kernel: [ 16.604880] device-mapper: table: 252:0: crypt: Device lookup failed
May 9 21:01:31 schambrin-laptop kernel: [ 16.605440] device-mapper: ioctl: error adding target to table
May 9 21:01:31 schambrin-laptop kernel: [ 16.633795] device-mapper: ioctl: Unable to rename non-existent device, cryptswap1_unformatted to cryptswap1
May 9 21:01:31 schambrin-laptop kernel: [ 20.568130] EXT4-fs (sda6): re-mounted. Opts: errors=remount-ro
May 9 21:01:31 schambrin-laptop kernel: [ 32.621565] EXT4-fs (sda5): mounted filesystem with ordered data mode. Opts: (null)

and later many of these :
May 9 21:02:05 schambrin-laptop kernel: [ 66.786117] Valid eCryptfs headers not found in file header region or xattr region
May 9 21:02:05 schambrin-laptop kernel: [ 66.786122] Either the lower file is not in a valid eCryptfs format, or the key could not be retrieved. Plaintext passthrough mode is not enabled; returning -EIO

Stepho.