I've been reading about generally increasing the performance of an RDP session here but those posts don't seem to cover what I'm looking for which is specifically the redraw rate of windows. I'm not interested in video playback or CAD/graphical performance.
I have Wyse V10L and C10L clients connected to a Server 2008 R2 host. It's a virtual machine and it has enough horsepower to handle the client load. I don't believe the poor screen redraw rate has anything to with the host itself.
From my Win 7 machines using Remote Desktop Connection I get a fairly decent redraw rate that does not leave me feeling uncomfortable or annoyed. However, on the thin-clients the redraw rate is much lower and there's a big difference.
I've tried disabling compression, USB/serial/sound, and pretty graphics (font smoothing, backgrounds, window dragging, etc.). None of this has made even a small difference in the redraw rate.
Is it as simple as the Wyse hardware not being able to redraw any faster? I don't have a more powerful Wyse device to compare with. Any ideas?