Differences in desktop and window manager behavior between Xinerama and multiscreen
modes
Desktop
or window manager Xinerama mode Multi-screen mode
Gnome (using Metacity) Xinerama-aware: maximizing a window
causes it to fill one monitor
only, and dialogs are centered on
the monitor. Wallpapers can be
scaled or tiled to fill the whole
screen (across all of the monitors).
One menu and panel bar appears,
on screen 0.
Panel bars appear on screen 0 only.
Wallpaper images are repeated on
all screens.
KDE (using kwm) Ximerama-aware, same as Gnome. Panel bars and K-menus repeated
on each screen. Wallpaper images
appear on screen 0 only; selected
background colors or gradients
appear on other screens.
MWM (Lesstif version) Unaware that the screen is not physically
one large display. Maximizing
a window causes it to span all monitors,
and centered dialogs are centered
in the whole Xinerama screen
(which may cause them to span
monitors or even appear in an inaccessible
area), instead of being centered
on a monitor.
Client windows opened using the
root menus open in the correct
screen. Maximizing a window
causes it to fill one screen only.
twm Manages whole screen as though it
were one physical display.
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