I got a (probably) similar bug on Dell latitude E5510 (with the same intel IGC) : external monitors works, but internal panel stay blank.
If using the Fn+F8 keys, the backlight of the internal screen ligth up, but the screen stay blank. The only (easy) way to get internal screen working is booting using failsafe mode (i.e. with nomodeset) -- 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/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 _______________________________________________ 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