Public bug reported:
I upgraded yesterday to 13.04 from Ubuntu Studio 12.10; running xfce4
and xfwm4. On a dual-monitor setup, I accidentally kicked out the DVI
cable from one of the monitors and plugged it back in (this may have
already happened once or twice without consequence; I can't remember if
that was before or after the upgrade). This second monitor displays all
windows correctly, and the mouse cursor is able to move between screens
as usual. But none of the windows or other UI elements on the second
monitor receive focus or respond in any way. Switching virtual desktops
only switches the first monitor. Trying to move a window from the first
monitor to the second monitor shows the mouse cursor on the second
monitor but not the window contents (and the window gets "stuck" on the
first monitor as though there is no second monitor).
Going to the console and back to X blanks out the second monitor, but
the mouse cursor can still travel to it. NVIDIA X Server Settings no
longer shows the second monitor, and Detect Displays does not fix that.
ARandR shows both displays in its layout and allows both to be
configured, until a new layout is applied, then the second display is
completely disabled (mouse now properly stuck on first monitor) and not
configurable.
** Affects: lightdm (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1234334
Title:
windows on previously disconnected second monitor no longer responsive
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