XRDP Session Issue with lower color bitdepth

[scottks5]

When I access a remote system with RHEL 8 using XRDP (xrdp-1:0.10.2-7.el8.x86_64 ) . Using Windows 10 Remote Desktop. the following bug happens (repeatably) . I realize that this software may not be supported under RHEL but if anyone could supply guidance or atleast a reason that would go along way to easing my mind.

when i go through windows 10 remote desktop and i set the color bit depth to 16 the session instantly shuts down. (the fact that i need 16 bit color depth is a result of a legacy software tool i am using and isnt relevant to this bug)

However, if i set it to 32 bit depth color the session is fine and i can operate with all of my applications except for the application that i need to operate with.

I have checked the error logs and the only thing it shows is VNC session closed. It gives a warning that the session closed too quickly.

I have tried removing and reinstalling XRDP and its associated dependencies so i suspect it might be ignorance of the configuration that is to blame or just an incompatibility on the RHEL 8 system.

[matt335672]

tigervnc won't support any acceleration at that colour depth. This rules out a lot of modern desktops. You could try something like XFCE with the compositor turned off.

If you edit /usr/libexec/xrdp/startwm.sh, you will see there's a couple of lines in there like this:-

# Uncomment the following line for debug:
# exec xterm

You can install xterm and uncomment the exec xterm line. That should let you at least start a minimal session, so you can check 16 bit colour depth can work.

Another option might be to try running your legacy application within a nested X server like Xephyr. The nested X server will have a depth of 16. This should work, according to the README