I am experiencing the same problem as well. I run a fresh install of karmic with all current updates installed and have a radeon 4850 running on proprietary drivers which came with the install as well(I don't know where to look for the version, but after the install a proprietary driver was suggested to be installed to run 3d games, so I clicked yes)
When watching videos, playing games or even in normal desktop use(when moving around windows, etc.) the tearing effect is pretty noticeable. I tried setting fglrx options an also added radeon.modeset=1 to /etc/default/grub as suggested above but it had no effect. -- Can't VSYNC properly on ATI (Mobility Radeon HD 2600 XT) https://bugs.launchpad.net/bugs/214154 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