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libEGL warning: DRI2: failed to authenticate

Hello All:

I am attempting to get a Pixy2 with the Pan and Tilt hardware running on the Dexter 2018.06.27 Raspbian For Robots distro (Raspbian 9 - Stretch).

I followed the “Hooking up Pixy2 to a Raspberry Pi” documentation here:
https://docs.pixycam.com/wiki/doku.php?id=wiki:v2:hooking_up_pixy_to_a_raspberry_pi
and “Installing PixyMon on Linux” documentation here:
https://docs.pixycam.com/wiki/doku.php?id=wiki:v2:installing_pixymon_on_linux

The Pixy2 is attached to the Raspberry Pi via USB.

However, when I launch PixyMon I am seeing these errors:

libEGL warning: DRI2: failed to authenticate

** (PixyMon:2027): WARNING **: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.ally.Bus was not provided by any .service files

and PixyMon reports “No Pixy devices have been detected.”

I am not really finding much on how these errors relate to the Pixy2.

Did I miss some other documentation? Any ideas?

Thanks!

Hello,
I haven’t seen that error, but it appears to be a library configuration issue.

Have you tried running as root – e.g. sudo pixymon?

You might need to change some symlinks for libegl:

Let me know what you find.

Edward