It would be good to get the dmesg/kernel log when the system fails to start, probably there is a warning/oops, so we can probably see exactly what the problem is.
In any case, this may be a recent bug discovered with some bioses and sp5100_tco, and a fix was made to sp5100_tco to avoid the specific situation. Can you install and test with sp5100_tco not blacklisted the kernel I uploaded at http://people.canonical.com/~herton/lp740011/ ? Also please attach the dmesg with this new kernel. ** Changed in: linux (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/740011 Title: Natty: the driver sp5100_tco prevents PC startup -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs