java windows are blank when color depth is 32b

[Coolgeek789]

I found that, when I use 32b color depth connecting to xrdp session, java app are showing blank :
https://stackoverflow.com/questions/45412979/java-rendering-over-remote-desktop

[peanutbutterandcrackers]

I can confirm that I faced the same issue with current xrdp devel branch (as of yesterday).

The solution was to set max_bpp=24 and xserverbpp=24 in /etc/xrdp/xrdp.ini because it turns out Java applications expect the color depth to be 24 bits per pixel.

It still remains to be figured out how to set it to some other value.

[matt335672]

This could be a duplicate of #1906. See TigerVNC/tigervnc#1308 if you're using the Xvnc back-end.

[MarcusJentzsch]

I figure out the problem. In my case we were using xrdp with xvnc on the background. All java screens were blank when connecting with Remote Desktop. The solution was to edit \etc\xrdp\xrdp.ini

[Xvnc]
name=Xvnc
lib=libvnc.so
username=ask
password=ask
ip=127.0.0.1
port=-1
xserverbpp=24 <------ The default here was 32. I changed to 24 and it worked