Cause for not being able to login?

Cause for not being able to login?

Before Ubuntu 12.04 LTS login screen I get this message and was wondering
if this could be the cause for the login screen returning after entering
my password and hitting enter; "The disk drive for /dev/mapper/cryptswap1
is not ready yet or not present."
When I login to my main user account it tries to load something but then
after a time just comes back to the login screen.
I am not able to login with Guest either, same kick back to login screen
after about 20-seconds.
This is a clean install.
When the Login to Guest window disappears I get a black screen with the
following message (after some OKs);
947.796019] nouveau E[ 1007] failed to idle channel 0xcccc0000
[1254.824019] """"" " [ 3136] " " " " """""""" [2417.180016] """"" " [
4086] " " " " """""" [2420.276016] """" " [ 4361] " " " " """"""
[3007.796018] """" " [ 6094] " " " " """"""