Same problem here: can't display both on the laptop screen and on an external monitor. Laptop screen alone is ok; when plugging the external monitor with VGA, I can only use that external monitor. It used to work. Dell Latitude E5410, i915 driver.
There are quite a lot of this in Xorg.0.log: [ 614.160] (WW) intel(0): flip queue failed: Device or resource busy [ 614.160] (WW) intel(0): Page flip failed: Device or resource busy When using xrandr: % xrandr --output eDP1 --auto --output VGA1 --auto --same-as eDP1 xrandr: cannot find crtc for output eDP1 When using gnome-control-center display, dmesg says: [ 107.800350] [drm:drm_crtc_helper_set_config] *ERROR* failed to set mode on [CRTC:3] I can test experimental packages or workarounds if needed. :-) -- 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/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
