I'm wondering if this is related to bug 44039. The issue would appear to be that it is unable to find a free PLL (or the like) for the eDP after it is turned off. eDP isn't limited to the first pipe, so it should be happy to attach to the second CRTC, just a puzzle as to why it did not.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/946311 Title: only external screen is working with asus zenbook ux31e [eDP1] To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/946311/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs