From: John Stone (
Date: Tue Nov 09 2021 - 15:36:18 CST

  What GPU and video drivers are you using? This could also be a but in
the desktop compositing-based window manager -- what window manager are
you using? Gnome? KDE? Something else, what version? I've heard of
two other users encountering something that sounded like this on recent
Ubuntu systems with unknown hardware/software configurations, but
otherwise I've not heard of anything like this in recent times.
It strikes me as a bug in your system software however.

The warning from VMD about the "Composite" extension is only
relevant to stereoscopic rendering. Today, most window managers
use compositing and stereoscopic displays are extremely rare, so
the current test versions of VMD 1.9.4 no longer emit this warning
even though it's still an issue.

  John Stone

On Tue, Nov 09, 2021 at 09:33:47PM +0100, Per Larsson wrote:
> Hi all,
> I have installed VMD version 1.9.3 on a machine which runs RedHat linux. The machine is a virtual server which I access using Remote Desktop and the rdp-protocol.
> The installation itself was ok and the program starts and runs, but the problem is that some of the windows, in particular the ???VMD Main??? window have semi-transparent drop-down menus (File, Molecule, Graphics etc???). I say semi-transparent, because the degree of transparency seems to be dependent on the background color. A black background gives almost no transparency, whereas opening the menus against a white background results in almost full transparency making it very hard to read the text.
> Upon startup I get the message ???Detected X11 ???Composite??? extension: if incorrect display occurs try disabling this X server option. This seems relevant, but after some googling I have still not been able to identify where I need to look to disable this extension. I am also not sure if the fact that I am using Remote Desktop complicates things. I did reach out to our universities support, and they told me to try asking for help here first. I would appreciate any hints about what I could do to solve this issue.
> Kind regards
> /Per Larsson, Uppsala University.

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