Comment # 4 on bug 1135237 from Peter S�tterlin

Created attachment 805259 [details]
xrandr outputs

Yes indeed, the system is usually running without monitor or keyboard
connected. So there's nothing to connect to.  It comes up with a standard
1024x768, and the icewm startup script of the autologin user will do an
'/usr/bin/xrandr --fb 1920x1080'

Sorry about the confusion with Xvnc, my bad.  It's of course not Xvnc, it's
x11xvnc, which connects to the running X server and then sends the data using
the vnc protocoll.
x11xnc_ssh is only a wrapper for x11vnc that sets up port forwarding via ssh so
you don't have to have the X server listen on outside internet ports...
Not sure how exactly the 'data acquisition' is done - but likely some sort of
framebuffer grab is the reason for the slowness and the high load?

How can I force the intel driver to use glamor?  

Attached are the two xrandr outputs (but they are identical....)