The time have risen from 20-25 sec in Meerkat to 35 sec in Natty. I do not know if it is ureadahead
but made a bugreport of it in launchpad. I tried Fedora shortly before installing Natty. They use systemd
instead of upstart
and didn't have this slow boot.
In a dmesg this jump shows up:
[ 3.087606] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
[ 15.292831] <30>udev[308]: starting version 167
How could it be that booting got so much worse? I also have a "black screen" much longer before Plymouth splash starts in Natty then in Meerkat. Could it be the famous kernel regression?
[ 3.413050] EXT3-fs (sda6): mounted filesystem with ordered data mode
and[ 17.810635] Adding 1998844k swap on /dev/sda5. Priority:-1 extents:1 across:1998844k
. Did you came any further? Do you have the link to the bug report?