If the "display contents of windows while resizing" option is turned off, resizing a terminal can cause a repainting issue. Specifically, because the window is not redrawn, the size indicator repeatedly repaints in the center of the new window. This leaves a white trail in xterm (for example), and a trail of gray boxes when the size indicator falls outside of the original xterm window size. Perhaps turn this feature off when the "display window contents" option is also turned off? P.S. I use Xfce as my primary desktop, so I plan to file more reports for the bugs I find in the future. I think it is a fantastic project, and would love to see the current beta become more stable.
I'm not sure there's anything I can do with this in xfdesktop. AFAIR, xfwm4 grabs the server during resize, so I don't think xfdesktop receives the expose events until after the resize is done. Olivier, can you confirm?
The X server is grabbed to be able to use XOR on the screen (to draw the frame). Therefore the clients have no chance to redraw the covered area. That's unavoidable, the only solution would be to disable to size/position indicator when opaque move/resize is disabled.
The window size/position is not shown when not using opaque move/resize in svn trunk (rev .22939)
Thank you for your attention!
Well, thinking about it, after reviewing #2240, I think it doesn't make sense to remove it. Turning off "display contents of windows while resizing" is for old hardware that cannot display window contents during move/resize, ie hardware > 10 years... I'm reverting the patch.
Changing to wontfix instead.