Pure Data GUI only appears after launching via the button if a terminal window is open

falkg · October 18, 2018, 6:58pm

Hi,

I installed pisound and it works basically well with pd. I vnc into the pie from OSX. The the Problem ist that 1Click button default setting launching puredata only works when a terminal window on the pie desktop is open. So it does not work just after the launch with all windows closed. As soon as I open a terminal window and after that press the button once pd comes up. The 3CLICK function works as expected even with no Terminal win open.
thanks
Falk

Giedrius · October 18, 2018, 7:33pm

Hi, Pure Data does get launched, but without GUI enabled… This has to do with X display detection that we have - it attempts to find the one you are currently using. For some reason having a terminal window open on that display helps it a lot.

Unfortunately, there’s no 100% sure way to detect the current X display reliably that we are aware of, so at the moment this is how it works… If you know how it could be improved, do let us know! The current logic is implemented here:

github.com

BlokasLabs/pisound/blob/master/scripts/common/common.sh#L93


		echo 1 argument must be specified! 1>&2
		return
	fi
	while true; do
		wait $1
		kill -0 $1 2> /dev/null || break
	done
}


# Find first X display.
find_display() {
	# If HDMI display is connected, try default :0 manually.
	if [ "$(tvservice -n 2>&1)" != "[E] No device present" ] && XAUTHORITY=/home/pi/.Xauthority DISPLAY=:0 xhost > /dev/null 2>&1; then
		echo :0
		return 0
	fi


	# HDMI display was unavailable, try finding another display (such as vnc) to use.
	display=$(ps ea | grep -Po "DISPLAY=[\.0-9A-Za-z:]* " | sort -u | head -n 1 | grep -oe :.*)
	if [ -z $display ]; then
		if [ -z $PISOUND_DISPLAY ]; then

falkg · October 18, 2018, 7:43pm

Hi Giedrius,

Thanks for the quick reply. Since I did not see the GUI I was assuming that it does not run. I should have had a closer look…So this solution now works for me, if I need the GUI I know how to get it. If I should come around a solution I will let you know.
cheers Falk