I had simmilar issue. I deisabled the gpu-manager.conf, deleted old xorg.conf, used aticonfig --initial to create a new config file, logged in and used amdcccle to make final adjustments.
I dont really understand this but it seems that there is some problem with randr. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311881 Title: dual screen ubuntu 14.04, second screen only partially displaying desktop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1311881/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
