The bug has been reported on https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1079096
"$ Xephyr :2
$ DISPLAY=:2 glxinfo Error: couldn't find RGB GLX visual or fbconfig"
The issue happens on Ubuntu quantal or raring with xserver-xephyr 1.13, installing the precise binary (1.12) makes it work
The bug has been reported on https:/ /bugs.launchpad .net/ubuntu/ +source/ xorg-server/ +bug/1079096
"$ Xephyr :2
$ DISPLAY=:2 glxinfo
Error: couldn't find RGB GLX visual or fbconfig"
The issue happens on Ubuntu quantal or raring with xserver-xephyr 1.13, installing the precise binary (1.12) makes it work