My final solution to this problem:
DON'T DISABLE /etc/init.d/cryptdisks-early !
1. DEACTIVATE AUTOMATIC MOUNTING OF CRYPTSWAP1:
Modify /etc/fstab changing the line:
/dev/mapper/cryptswap1 none swap sw 0 0
to
/dev/mapper/cryptswap1 none swap noauto,sw 0 0
and modify /etc/crypttab changing the line from:
cryptswap1 UUID=01234567-89ab-cdef-0123-456789abcdef /dev/urandom
swap,cipher=aes-cbc-essiv:sha256
to
cryptswap1 UUID=01234567-89ab-cdef-0123-456789abcdef /dev/urandom
noauto,offset=6,swap,cipher=aes-cbc-essiv:sha256
Don't forget to replace my sample UUID with the correct for your system.
On my system offset=6 was sufficient, because cryptsetup already skips
the two first sectors of the swap partition.
2. REBUILD YOUR SWAP PARTITION
CAUTION: you must replace /dev/sdaX with the correct swap partition for
your system!
sudo mkswap --label Ubuntu\ Swap --uuid 01234567-89ab-
cdef-0123-456789abcdef /dev/sdaX
Don't forget to replace my sample UUID with the correct for your system.
The label is optional (I like swap partition labels :D)
3. CREATE AN UPSTART SCRIPT ( /etc/init/cryptswap1.conf )
start on started mountall
script
/sbin/cryptdisks_start cryptswap1
/sbin/swapon /dev/mapper/cryptswap1
end script
4. REBOOT AND VERIFY YOUR SYSTEM
$ free --human
total used free shared buffers cached
Mem: 15.7G ...
-/+ buffers/cache: ...
Swap: 16.0G ...
$ swapon --summary
Filename Type Size Used Priority
/dev/mapper/cryptswap1 ...
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https://bugs.launchpad.net/bugs/1310058
Title:
ecryptfs-setup-swap hints after reboot
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