export XLIB_SKIP_ARGB_VISUALS=1 hinted here: https://bugs.launchpad.net/ubuntu/+source/amule/+bug/584429 fixes the problem
export XLIB_SKIP_ ARGB_VISUALS= 1 /bugs.launchpad .net/ubuntu/ +source/ amule/+ bug/584429
hinted here: https:/
fixes the problem