In my system vertical bar disappeared, but the screen now presents the type of glitches you casn see in the attached file. I have a radeon 6450 and the latest mir, xmir and kernel (as of 28/09/2013).
** Attachment added: "Desktop glitches" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1218815/+attachment/3846628/+files/Schermata%20del%202013-09-28%2009%3A16%3A43.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1218815 Title: [radeon] Graphic glitches and screen corruption (vertical lines) on XMir surfaces only To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1218815/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs