@Robert I'm thrilled to say that *both* solutions worked! First, "drm_kms_helper.poll=0" with the current Quantal kernel made the stutter problem go away.
Second, I grabbed the current daily build of Raring from http://cdimage.ubuntu.com/daily-live/current/, created a bootable USB, booted from it, and plugged in the monitor via HDMI. Again, no stutter problem when booting from Raring. Just to be sure it wasn't something special with booting from a live USB, I created a Quantal live USB, and the problem again manifested itself. Thanks so much! :) Sorry I hadn't gotten around to trying the suggested from comment #10 before today. If I can provide anything else, let me know. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/964231 Title: System Stutter When HDMI Monitor Is Connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/964231/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
