empty x windows

empty x windows

[J. Bruce Dean]

Hi,

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.

j


--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://x.cygwin.com/docs/
FAQ:                   http://x.cygwin.com/docs/faq/

Re: empty x windows

[Jeff Spirko]

On Mon, Jun 14, 2010 at 3:37 PM, J. Bruce Dean <jbdean@gmail.com> 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.

One important thing is to make sure the X server is started while the
second monitor is active.  I know that if I start XWin in
single-monitor mode, then attach the second monitor, the X server
needs to be restarted.

Hope that helps,
-Jeff

--
Jeff Spirko   spirko@gmail.com   spirko@lehigh.edu   WD3V   |=>

The study of non-linear physics is like the study of non-elephant biology.

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://x.cygwin.com/docs/
FAQ:                   http://x.cygwin.com/docs/faq/

Re: empty x windows

[Jon TURNEY]

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

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://x.cygwin.com/docs/
FAQ:                   http://x.cygwin.com/docs/faq/