About the multi-screen problem

[yanbx]

Does the SPICE protocol not support dual screens?We can't do a two-screen display

[fadams]

This is not an issue with this repo.

You really do need to learn how to do your own research

I believe that SPICE does support multiple monitors though you may have to look at the configuration https://www.spice-space.org/multiple-monitors.html

https://people.freedesktop.org/~teuf/spice-doc/html/ch02s07.html

If you actually look in the ubuntu-gnome-spice:18.04 Dockerfile there is a line

    sed -i 's/#Option "NumHeads" "4"/Option "NumHeads" "1"/' /etc/X11/spiceqxl.xorg.conf && \

It's just possible that removing this line will be enough to support 4 monitors, but I have no idea.

I've specifically said these examples represent a starting point.