further investigation (booting with the 2.6.26-5-generic kernel), reveals that this was a kernel issue. moving to 2.6.27 seems to have been the fix
-- [rv635] blank screen and hangs radeon 3650 on amd64 https://bugs.launchpad.net/bugs/254583 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