For the Qt applications, try setting QT_GRAPHICSSYSTEM=native. I did experience Qt applications pushing whole window-sized bitmaps until I discovered this. Now

For the Qt applications, try setting QT_GRAPHICSSYSTEM=native. I did experience Qt applications pushing whole window-sized bitmaps until I discovered this. Now remote $DISPLAY works well again. It seems the functionality is there, just the default setting gives poor performance over the network. I agree, good software works over wireless LAN with no issues. At my workplace this is used extensively.