setupAstroRaspbianPi.sh includes code that comments out dtoverlay=vc4-kms-v3d/ in /boot/config.txt.
This line must be left uncommented to use the second HDMI output on a Raspberry Pi 4.

I've just tried to update my setupAstroRaspbianPi.sh script but it fails on the connection tests to the websites, if I comment out the first line checkForConnection ZRam-script "raw.githubusercontent.com/novaspirit/rpi_zram/master/zram.sh" it then fails at the next line, checkForConnection INDI-Git-Repo "github.com/indilib/indi.git" and so on for all the checks. if I run the script with the all the checks commented out it fails at the connection to the website.  I've copied & pasted the website addresses into the browser on the Pi and it finds the website straight away, so I know it's not the internet connection and the sites are not down for any reason.  I tried the setupAstroPi3.sh on the latest version of Mate and it runs fine. However I prefer the Raspberrypi OS version as I think it runs smoother over VNC and is more stable. 
I've also tried re-running the script on a setup from a couple of months ago and that fails as well due to the same issue.  Has anyone else seen this or have a solution to it?

Many Thanks
Alan

With the new Raspbian 64bits, the version of curl installed doesn't shows a textual description of the response. you can replace line 37:

with

With this changes I was able to build an AstroPi3 64bits system. Unfortunately at this moment, KStars fails at build time.

Many Thanks for the reply, I'll try that tonight.

The script ran through with the line changed as recommended, but KSTARS fails to build on the Raspberry Pi 32 bit OS as well. I thought something wasn't right as the script completed too quickly.

I just made an update for the change in curl.  It should find the websites now.  Please see if this fixes the problem.

Andrew, I just updated the documentation for the line you mentioned to explain the issue with a 2nd Monitor.  Please check that it correctly explains the problem.

Rob, I've just tried the revised script and it runs through but again it fails to build KSTARS I caught the error shown on the terminal as below I used option 1 for the KSTARS install in the script

Thank you for looking into this.

make[2]: *** [kstars/CMakeFiles/KStarsLib.dir/build.make:788: kstars/CMakeFiles/KStarsLib.dir/KStarsLib_autogen/mocs_compilation.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:1385: kstars/CMakeFiles/KStarsLib.dir/all] Error 2
make: *** [Makefile:141: all] Error 2

Alan

Hi Alan,

Take a look to this thread indilib.org/forum/development/9372-compi...t-github-source.html. I've successfully compiled KStars/Ekos on 64bits Raspbian using the commit commented on this thread.

Rafa

Rafa, Thank You, I will. I’m using the 32 bit system at the moment, but I’m willing to try the 64 bit OS to see if that improves the performance on the Pi

FYI for anyone else encountering build issues that resemble this . I had a bit of an issue compiling KStars with the script recently when the script did not properly recompile updates to Stellarsolver 2.0. Although it looked like it recompiled it, something old must have remained that caused an issue. Solution should be as simple as deleting old build files.

I had an issue compiling Core INDI today, reported as 'Could not find Libev'. It was a simple fix to reinstall/update it.