I don't still have the old kernel. However if I boot the laptop with an Ubuntu 15.04 Desktop amd64 USB stick then both the Apple Cinema 27 and the Panasonic television are detected and display a stable picture.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1488409 Title: [MacbookPro11,2] Using external displays show corrupted, flickering images To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1488409/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp