Clean install of 13.04 on a Lenovo X60 installs fine but booting system doesn't give you a login screen. The screen displays BIOS, a plain purple screen and then nothing. If I close the lid to force a sleep and then re-awake the machine it works fine. Installed kernel was 3.8.0-23.34, changed grub to use nomodeset which sort of worked although display was very slow and unusable. Updated to 3.8.0-23.34 but no changed. Updated to 3.8.0-23.34 and working as expected.
Sorry last line should be updated to 3.9.0-030900.201304291257 and working as expected
3.9 works, case closed for upstream. Thanks for reporting this issue, and in case it breaks again please reopen the bug report.