$ /usr/bin/pamusb-check --debug --config=/etc/pamusb.conf --service=pamusb-agent username
* Authentication request for user "username" (pamusb-agent)
[src/local.c:037] Checking whether the caller is local or not...
[src/local.c:046] Authentication request from tty pts/4
[src/local.c:065] Caller is local (good)
[src/device.c:057] Connecting to HAL...
* Cannot connect to system bus: The maximum number of active connections for UID 1001 has been reached
* Access denied
For some reason, connections to DBus stay
sys-apps/dbus-1.8.20.