On Lunux OES SP2, when attempting to login at the console GUI, the login
seems to be processed, but then I am returned to the login screen with the
following errors:

kdm: 0[12465]: Cannot write to (null)
kernel: mtrr: 0xde000000,0x800000 overlaps existing 0xde000000,0x400000

Sometimes the last line appears twice. This occurs for root, local and LUM
users. Login via text console is fine.