I’m getting a similar problem with the exact Xorg error code, but using bspwm. (which I believe it’s not too different to awesome WM)
However, when I debugged the editor, the crash seemed to happen randomly on LwjglWindow.java (from jME) inside the “update loop”. Sometimes it only takes 3 cycles to crash, but other times it was able to go through 20 cycles.
I finally have the time to test more about this problem, so I’ll try both your workaround and a simple jME test case now.