sda5 is my system partition (I have a dual boot... even if I can't remember the last time I've started vista).
I did an upgrade from 12.04 (I've done that since the first install, long time ago).
What is puzzled me is the difference of time between the last message indicated that the sda5 is mounted and the swap mounted.
May be the sda5 is not really monted when the message
[ 4.636909] EXT4-fs (sda5): mounted filesystem with ordered data mode. Opts: (null)
In generated /etc/fstab, I have this entry:
Do you see anything wrong?
# Entry for /dev/sda5 :
UUID=f6e51472-f0e4-4466-98c9-3f064ec4875f / ext4 errors=remount-ro 0 1