Hi,
I have frequent transient windows which I post over my main window, and 'd like to reduce the number of redraws I have to do. I know the best way is to use Composite and a compositing window manager to do this, but unfortunately I can't use Composite.

It looks like save_under would help, but it doesn't seem to do anything on Gnome or blackbox. Are there any window managers which support save_under or backing_store ? Is it even in the window manager domain or is this an Xorg thing?

Thanks