This is a very common, and known issue with the ATI video driver. From what I understand, is basically a whole set of Radeon cards (including the ATI Radeon Mobility X1600) have poor performance and various bugs with X drivers (both open source & proprietary). It's a known issue, one that doesn't seem to have a solution beyond what you've already discovered (nomodeset). My suggestion, try another driver and see if it works better, or live with nomodeset.
-- ATI card requires nomodeset to boot https://bugs.launchpad.net/bugs/517222 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
