Public bug reported:
Nvidia's binary drivers support hotplugging of monitors, with a
technology known as TwinView (unfortunately, not the standard Xrandr)
which can be affected by using the nvidia-settings program.
This would be great, except for the fact that when the monitor is hot-
plugged and enabled with nvidia-settings, metacity (and compiz) is
tricked into thinking both monitors are combined into one giant screen,
so the GNOME panels stretches across both screens, new windows appear
across the split in the both screens, and maximized (or full-screened)
windows take over both monitors, as opposed to being maximized on a
single screen. This indicates that Xinerama information isn't flowing.
However, if the monitor is plugged in before X starts up (or if X is
restarted after the monitor is plugged in), the xinerama data appears to
flow correctly, and all the problems listed above go away. Of course,
this mitigates the benefit of TwinView supporting the hotplugging of
monitors.
** Affects: linux-restricted-modules-2.6.24 (Ubuntu)
Importance: Undecided
Status: New
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[nvidia-glx-new] TwinView only provides Xinerama information when monitor is
connected during X initialization
https://bugs.launchpad.net/bugs/200138
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