QXcb connection XCB error 170

edit

I found one possible cause/solution to this problem in this blog post: Running ROS on Windows 10. The problem was that the LIBGL_ALWAYS_INDIRECT flag was set to 1. As per the blog post:

it is not possible to launch rviz when this indirection is active

Setting it to 0 fixed the problem for me and allowed me to run rviz properly:

export LIBGL_ALWAYS_INDIRECT=0

You can check what it is currently set to using:

echo $LIBGL_ALWAYS_INDIRECT

It seems that every new WSL (I assume you are using WSL to run Linux/ROS on Windows) shell defaults this flag to 1. So you may need to add the export command to your .bashrc file.

I should also mention that I do still see the error. The only difference is that with it set to 0, Rviz will actually launch.

May not answer to the question directly though,

• I see Qxcb error, meaning the problem is related X. RViz is graphic instensive much more than other simpler GUI tools.
  • I see you're on Windows. For Windows + X, #q335787 gives a good list of things to look at.
• Took a brief look at panda_moveit_config/launch (as I've seen multiple questions reporting similar issue with this package). So far I don't see anything particularly concerning regarding RViz operation.
  • I've struggled a lot in using RViz over X in our product development. My conclusion so far is unfortunately I moved away from X and use something else (Remote Desktop etc.) to guarantee a consistent behavior.