Yes, clone mode.
This bug was opened really just for collecting a set of logs to compare
with another bug about this issue.
Effectively the problem is that gnome is responsible for setting multi-
monitors to extended when present, however it's inconsistent doing this
and comes up cloned in situations where it shouldn't (which is gnome's
fault).
A side problem is that users *would* like to have it come up cloned
automatically when the external display is a projector; however afaik
there is no way to deterministically detect whether a display is a
projector. It can be done heuristically by checking if the display's
physical dimensions are 0x0mm (which seems always the case with
projectors), however that is not yet implemented in gnome.
A compounding problem is that Fedora *does* patch X server to do
extended by default, and gnome shell's config tools were built with this
assumption. (At least, this seemed so a few weeks ago when we were
studying the problem).
In any case, I don't need this bug anymore (the issue is a gnome one,
reported elsewhere), so will close it out.
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1071091
Title:
External monitor on laptop comes up mirrored
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