My setup is:
I'm AFP-ed, SSH-ed and VNC-ed to my RPi, and I can run all the command-line scripts I wrote, and also I can open any installed GUI applications, however, when I want to run a tkinter-based GUI app, to control some hardwares connected to the GPIO, I'm having this error message:
Client is not authorized to connect to ServerTraceback (most recent call last):
...
_tkinter.TclError: couldn't connect to display ":1"
My guess is, that this is related to the fact, that there is no physical display attached to the RPi, although I don't know how to solve this situation.
Thanks in advance!
I asked this question on RaspberryPi Stack Exchange site, and @hildred had a beautiful solution for this:
Write these few lines to etc/sudoers
*:
Defaults env_reset
Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
Defaults env_keep += "DISPLAY"
Defaults env_keep += "XAUTHORITY"
And these few lines to ~/.bashrc
:
if [ -z "$XAUTHORITY" ]; then
if [ -e $HOME/.Xauthority ]; then
export XAUTHORITY=$HOME/.Xauthority;
fi;
fi
**On a Raspbian this will be etc/sudoers.d/README
for example*
A person on the Raspberry Pi forums solved a similar problem with tkinter :
A simple work around is to give root the proper authorization to use the X11 connection. Again, within a LXTerminal window:
pi@raspberrypi ~ $ sudo xauth add `xauth list`
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