I also have this same problem. iMac 27" (late 2009) 4 Gb RAM 1 TB ATI Radeon HD 4850
I have tried everything under the sun. ATi Drivers, Open Source Drivers, and Propretary Drivers. Some methods have brought the screen up but with major tearing and ghosting issues others have not done anything but move the output to my display port. Very Frustrating. Hopefully a fix is out soon! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/597070 Title: Imac Radeon HD 4850 switch "Mini Display Port" output during install resulting black screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/597070/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
