If I get the rpi all connected with mouse, keyboard and monitor, and get It running in 4K it works well, then I connect via VNC from another PC while still having the rpi connected to a monitor, it comes up on the PC in VNC in 4K....

BUT as soon as I do the same with no monitor connected to the rpi, all I get is a black screen in VNC with message saying can’t show to desktop at this time...

So, if I set the resolution in raspi config to 95 rather than the default, then try it all again, VNC will now show the rpi desktop but in a really low resolution, and when I try and change it through VNC all the 4K settings have gone, and it’s also very difficult to change the res at all, and when I can 1920x1080 is the highest it will go, but even that is hard to change, it seems to want to stay at about 1200x720 or something like that..

I don’t understand why it will work with monitor connected to rpi but not without, have even tried a dummy HDMI plug...

The problem is that on a 28” 4K monitor even HD res is rubbish..for my needs...

So this rpi4 is no use for my astro set up which requires it to be outside on a telescope, and controlled via VNC from a laptop indoors.

Maybe you could try XRDP. It builds a second session rather then copying the existing session as for VNC. I use it for my Pi 4 but up to now in HD.

I don't know if it's possible on the Rpi4, but you might try NoMachine as a vnc replacement.

Hi, please Try it in 4K and let me know how you get on...if you have 4K monitor...as I need to run the rpi headless but with 4K across network to my laptop...

Unfortunally, I can't work higher the 1920x1080. It is a small package and installing is as simple as sudo apt-get install xrdp. For me it works very well. If your laptop is Windows, you can use the Microsoft remote desktop directly without any additional installation.

Had a look into this and will give it a try later...
I normally use a Linux laptop, but if I can get it to work on my windows machine, then that’s a great start and at least I can use on there for now...thanks..

Superb.....that works perfectly thanks very much.....

Hello,

hope you're well.

May I ask - are you attempting to get Stars/Ekos/INDI running on the Pi 4 using the Stellarmate image? I ask because I'm very interested in doing this too.

Any information you can share about this I would be very glad to see.

Clear Skies (Someone has to get them )

cas

Hi,
Yes I have latest Kstars and INdI running on the PI4, but not Stellarmate, that will take a while, but runs well on raspbian buster, also runs now in 4K using XRDP on the pi and Remmina Remote Desktop software on Ubuntu laptop...works really well..

Ok I have found a Remote Desktop software for Ubuntu that works really well with XRDP on the pi, it’s called Remmina, and runs a treat.... as good if not better than windows Remote Desktop....

Hi,

thanks for the reply. Sorry, more questions.......

Did you have to compile from source ?
Are you Plate-Solving on the Pi ?
Is buster easy to get hold of ? (Not Pi savvy) Been doing stuff on Arduino.

Grateful if you have time to reply.

Regards,

cas

Yes had to compile from Source..
Yes platesolving all on the pi have downloaded all the index files I need..
Buster is the latest version of raspbian and easy to download