I am having the same issue with a HP NW8440 freshly installed. The waves appears on the laptop's lcd and resolution changes causes everything to get garbled - re-changing doesn't fix.
Applying the "options radeon modeset=0" fixes the waving on laptop screen, but resolution changes still cause problems. Boot screen is faulty as well. -- [RV530] Video problem: External monitor wavy, unreadable. ati radeon [Needs pll quirk] https://bugs.launchpad.net/bugs/537640 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
