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Re: empty x windows


On 14/06/2010 20:37, J. Bruce Dean wrote:
When running dual displays, using cygwin/x, the external monitor frames are
'invisible'. The window moves from the (laptop) display, working, on the
external monitor they have a border, but the background is a snapshot of
the app running on the external monitor. If I type, it works, but nothing
displays. Moving the window moves the snapshot of the background. Moving
back to the primary display I can see whatever I typed on the external
monitor. Searching provided some things to try, such as the 'screens' and
'mulitplemonitors', neither worked.

Another other thing I've recently come across which might cause this behaviour is if the 2 monitors have different colour depths. In that case, something does get written to XWin.0.log indicating that we will use the primary display only (effectively turning off -multiplemonitors), but I guess it could be clearer.


Perhaps we should arrange to constrain the X windows to stay in the area of the virtual desktop for which the shadow framebuffer covers, to avoid windows which don't get their contents drawn like that.

--
Jon TURNEY
Volunteer Cygwin/X X Server maintainer

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