IMHO the flickering is caused by using 2 graphic cards for the unity desktop and not by connecting a 3rd Monitor. (seems to be consistant with previous posts )
I'm able to turn the flickering on / off by enabling / disabling my 4th monitor which is connected to my second "Radeon HD 6450" Setup: ------ 1x Radeon HD 6450 -- 2x DVI BenQ GW2750 -- 1x HDMI BenQ GW2750 1x Radeon HD 6450 -- 1x DVI BenQ GW2750 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1278223 Title: Mouse Flickering after adding 3rd Monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1278223/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs