Hi Ali! You're not saying which GUI toolkit you're using but I've noticed that in the latest version of GTK you'll need to use the GDK threads_enter() and threads_leave() functions in the sync-message-emission callback method where you set which window to use. Greets Jens <div class="gmail_quote">On Tue, Feb 2, 2010 at 11:49 AM, Ali Abdallah <<a href="mailto:aliov@xfce.org">aliov@xfce.org</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Hi, I have an application that uses playbin to play audio files, the application switches between audio files by setting playbin to ready state then setting the new uri and bring the playbin to play state again, while this seems to work, i have an XError problem raised only on a 64 bit machine with ATI vga, and if visualization are enabled. Using xvimagesink or ximagesink, the error is raised at the same call: XSync (ximagesink->xcontext->disp, FALSE); ximagesink, line 964 xvimagesink, line 864 The error was 'BadGC (invalid GC parameter)'. (Details: serial 43 error_code 13 request_code 132 minor_code 19) Any hint will be appreciated. Best Regards. ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. <a href="http://p.sf.net/sfu/theplanet-com" target="_blank">http://p.sf.net/sfu/theplanet-com</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </blockquote></div>