1

I am currently trying to make an autonomous drone using the Robot Operating System (ROS). To do this, I have installed Raspbian Lite (Jessie) on a Rasperry Pi 3 and am currently using ROS Kinetic on it. Because it is Raspbian Lite, there were no window managers or desktop environments that came along with the installation. I decided to go with Openbox Window Manager and installed a terminal onto it for convenience. I can just call sudo startx, and the window manager opens up, which can be accesed by Ctrl + alt + F2. Since it is a system-wide terminal, I have also installed tmux for convenience. I am running the xserver on a particular pane and conduct my ROS work on other panes.

Now when I try to run commands that call on a GUI application from my system-wide terminal, I get the error:

QxcbConnection: Could not connect to display
Aborted

Now there are two ways to approach this problem:

  1. Since there is a terminal installed in my Window Manager, I should get ROS working on this? However, I do not know how to change the environment of the terminal emulator inside the window manager so that it is the same as the one on the system-wide terminal. Is it as easy as changing shells?

  2. Actually find a way to send my GUI applications to the tmux pane that is currently running the command sudo startx. How do I switch the parent of a process with another parent?


NOTE: I definitely would prefer the second solution, as it is more elegant and efficient for my workflow.

2

In a terminal in your GUI environment, type:

xhost +

In the non-GUI environment, type:

export DISPLAY="localhost:0"

Then, graphical applications that you launch from the non-GUI environment will be displayed in the GUI environment.

You can read more in man xhost

See also this answer from: What does this xhost … command do?

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.