I had planned on using an Android tablet (more specifically the Android e-Reader Onyx Boox Note) as an extended external screen for the Gemini on Linux, basically along the lines of what is described here: https://www.hitbits.net/2016/02/26/use-an-a...r-for-linux-pc/

Unfortunately, I hadn't thought of the issues that the Gemini's somewhat idiosyncratic graphics implementation raises. In particular, I'm stumbling on the crucial step of getting xrandr to make an additional, virtual output available. The only advice I found online for that so far involved adding lines to xorg.conf (or the modern descendants), but those instructions were specific to intel graphics. On the gemini, xrandr only has a hwcomposer device. I don't know much about these things, but I got the impression that's actually an Android thing?

In any case, does anyone have any advice to either introduce a VIRTUAL output for xrandr to then pipe to a VNC server, or any other method of being able to use a tablet device with a VNC client to display an extended Linux desktop?

As an aside, in case anyone else is interested in such a solution -if it turns out to be feasible - in terms of connectivity I'm aiming to have the Android device connected to the Gemini via a USB network, which should be comparatively unproblematic using the rndis device that automatically shows up (and for the Android-side of things, in case anyone's interested, there are quick instructions and even a simple app on mobilereads by user mdp: https://www.mobileread.com/forums/showthrea...2001&page=5 ).