I suffer from the same bug, and reported it here. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1029790 I started doing bisect, but the commit that does this bug is already found, see https://bugzilla.redhat.com/show_bug.cgi?id=845745 and the commit is https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=2099810f903caa1920f3ef6014fb7f36e4786490 "pci bus mastering"
How to report that to upstreams? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1029790 Title: 1002:714a Can't boot without nomodeset option-kernel 3.5.X.X/3.6.X.X ATI M52 [Mobility Radeon X1300] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1029790/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs