[Bug 89143] [BYT] Internal display goes blank when setting up external monitor as clone

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89143

--- Comment #5 from Milan Bouchet-Valat <nalimilan at club.fr> ---
Created attachment 113828
  --> https://bugs.freedesktop.org/attachment.cgi?id=113828&action=edit
xrandr --verbose

Here it is. I connected the VGA external screen, and it was configured as a
clone of the internal one: everything was fine on both screens. Then I defined
the internal screen as the primary one, and it turned blank (the external
monitor was set as secondary, as could be seen from the "2" in its corner).
After 60s without any reaction from my part (I couldn't see the window
anymore), gnome-control-center tried to restore the configuration to its
previous state (cloned screens). As a result, the internal screen remained
blank, but the desktop+windows appeared on the external screen. I ran xrandr at
that point.

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