While moving or rezising windows ( not opaque mode , but only with frame
outline ) all gfx output is frozen, like on AmigaOS :-)
I think this even causes xmms to stop playing , because it tries to update
the time-position. Happens with other windowmanagers too.
( But not on IRIX 5.3 , so I don't see why it must block on linux )
Cannot reproduce. It is possible that on a very slow system, moving the window
around would use up all the CPU time.
The enlightenment window manager ( and some others too , like the CDE WM )
blocks all gfx while the outline of the window is visible, while moving or
resizing it. Note that the moving-mode is outline/boxed/... so that only the
a single box is dragged and the window appears at the new position when the
mouse button is released ( as opposed to opaque moving , when the window is
moved/resized in real-time as the mouse is moved ). Whether this is a bug or
just a compromise between speed and functionality is a matter of opinion.
The 4Dwm ( from IRIX ) does not block gfx , tested with the same X server, but
the outline flickers, they must have some special support in the SGI X server.