I had the same issue and realized I was on the vesa driver. Now I've changed to radeon and instead of the same lines you are seeing I now see a sequence of white blocks at the top of the dash itself.
If this is a driver issue, it appears to be something that unity is doing when drawing various sections of the dash and launcher that affects different parts of multiple drivers. ** Attachment added: "Screenshot.png" https://bugs.launchpad.net/ubuntu/+source/unity/+bug/718928/+attachment/2093360/+files/Screenshot.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/718928 Title: strange white lines on Unity launcher/dash -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
