Hello Try to boot in textual mode, power on, hold down left shift, when grub menu appear press the key e and in the linux line remove quiet and splash, then ctrl+x to boot, refere where the system encounter problems. Thanks Fabio
** Changed in: 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/763909 Title: 11.04 Wont Boot With Mobility Radeon HD 3400 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs