Upgraded to Ubuntu 13.04, broke triple monitor setup on W520

able to purge and install bumblebee again to make optirun glxspheres work
http://askubuntu.com/questions/290443/bumblebee-cannot-access-secondary-gpu-error-xorg-ee-no-devices-detected

but after patching and compiling new version of xserver-xorg-video-intel
https://launchpad.net/ubuntu/+source/xserver-xorg-video-intel
as 2:2.21.6-0ubuntu4

xrandr can not show VIRTUAL

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