I think the duplicate status is wrong. This is not dependent on a suspend. It happens when using the default video driver for 64-bit. I'll attempt to remove the link to bug #740928.
** This bug is no longer a duplicate of bug 740928 kernel panic in Natty Aplha 3 after sleep -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/741464 Title: [STAGING] Alpha 3 Narwhal on MacBook locking up every hour -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs