https://remkoweijnen.nl/blog/tags/microsoft/Recent content in Microsoft on Remko's BlogHugoen-usFri, 30 Nov 2012 13:28:54 +0000https://remkoweijnen.nl/blog/2012/11/30/application-causes-screen-flickering-in-citrix-xenapp-session/Fri, 30 Nov 2012 13:28:54 +0000https://remkoweijnen.nl/blog/2012/11/30/application-causes-screen-flickering-in-citrix-xenapp-session/<p>Yesterday I was asked to troubleshoot an interesting issue with an application running on Citrix XenApp.</p> <p><strong><span style="text-decoration: underline;">Environment<br> </span></strong>This customer is running Citrix XenApp 5 on Windows Server 2003 (x86). On the Client Side the Online Plugin version 12.3 is used.</p> <p><span style="text-decoration: underline;"><strong>The Problem</strong></span><br> When this particular application was active the screen was flickering and black blocks appeared at seemingly random places. Further more it was not possible to resize the window:</p> <p><a class="glightbox thickbox" href="https://remkoweijnen.nl/blog/wp-content/uploads/2012/11/image.webp" data-type="image" data-gallery="post-2778"><img loading="lazy" decoding="async" style="display: inline;" title="image" src="https://remkoweijnen.nl/blog/wp-content/uploads/2012/11/image_thumb.webp" alt="image" width="425" height="239" /></a></p> <p>My experience is that display issues are often related to either HDX Flash Redirection (offloading flash to the client) or the Multi Monitor hook.</p> <p> </p>