Thanks for the info Robby - dunno how I missed finding those files ... oh wait yes I do - Windows Search - doh! <div class="gmail_quote">On Thu, May 24, 2012 at 6:32 PM, Robby Findler <<a href="mailto:robby@eecs.northwestern.edu" target="_blank">robby@eecs.northwestern.edu</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I've pretty much no clue how to fix it, but the code you see is in collects/mred/private/wx/win32/frame.rkt. The display-origin function (it is called from mred/private/wxtop.rkt). hth, Robby <div><div class="h5"> On Thu, May 24, 2012 at 7:08 PM, Kieron Hardy <<a href="mailto:kieron.hardy@gmail.com">kieron.hardy@gmail.com</a>> wrote: > Hi all, > > On one of my client's laptops (Windows 7), the attached code detects the > second display monitor (get-display-count returns 2), but prints exactly the > same values for the location and size of the two displays. i.e. The top-left > coordinate and size values returned ((0,0) and 1024 x 768) are the same > for both monitors. This effectively maps the second monitor underneath(?) > the main monitor, making it inaccessible to Racket. > > In this particular case the second monitor is a TV connected through the > laptop's s-video port. Windows itself sees the two displays and is > configured to extend the desktop over both of them and 'Identify monitors' > works as expected. At least one other program can see and use the TV without > problems. > > Racket has no problems seeing and using a second display monitor on this > same laptop when that second monitor is a video converter box connected > through the laptop's VGA port. Also Racket has no problems seeing and using > a TV as a second display monitor when connected to my (Vista) laptop's HDMI > port. > > What can I do to troubleshoot this problem? I have searched the source for > both 'get-display-left-top-inset' and 'monitor' and only find something > relevant in .html and .js document files. Where in the source should I be > looking? > > Thanks in advance for any help. > > Cheers, > > Kieron. > > **** > > #lang racket/gui > > (printf "display-count:~a\n" (get-display-count)) > (printf "display-depth:~a\n" (get-display-depth)) > > (for ([m (in-range 0 (get-display-count))]) > (let-values ([(mx my) (get-display-left-top-inset #f #:monitor m)] > [(mxwob mywob) (get-display-left-top-inset #t #:monitor m)] > [(mw mh) (get-display-size #f #:monitor m)] > [(mwfs mhfs) (get-display-size #t #:monitor m)] > ) > (printf "monitor:~a (~a ~a) (~a ~a) (~a ~a) (~a ~a)~n" m mx my mxwob > mywob mw mh mwfs mhfs) > ) > ) > > </div></div>> ____________________ > Racket Users list: > <a href="http://lists.racket-lang.org/users" target="_blank">http://lists.racket-lang.org/users</a> > </blockquote></div>