Supercollider issue: "Could not connect to any X display"

Patchbox OS
#1

Hi there, Having some trouble running supercollider when I ssh in from my PC, here’s what pops up:

compiling class library…
Invalid MIT-MAGIC-COOKIE-1 keyqt.qpa.screen: QXcbConnection: Could not connect to display :0
Could not connect to any X display.
terminate called without an active exception
Aborted

Any thoughts on a workaround?

#2

Hi, you have to first set up some X11 variables in your ssh session so it knows which virtual display to use:

export XAUTHORITY=/home/patch/.Xauthority
export DISPLAY=:0

It should then be able to start and show up on Raspberry Pi’s monitor.

#3

Hi Giedrius,

I tried that, no dice. I should clarify that I don’t have any display connected to the pi, just an audio device and an adafruit VEML7700 light sensor

#4

Do you have ‘desktop autologin’ option selected in patchbox boot submenu, or sudo raspi-config, boot submenu?

Otherwise, you have to start SC in a special way, see here:

Other information there may be useful too.

#5

this did the trick! and will turn out to be a very handy repo, thanks!

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#6

Good to hear you got it working!

What solution did you use in the end? Using the build and the command line from the linked repository?

#7

So, all I did was clone the directory into the root folder, then used the code under the “headless” section. I ended up making some aliases to speed up the process, but it works like a charm!

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