I have successfully paired gamepad IPEGA PG-9025 (bluetooth) with my notebook (Ubuntu 14.10).
IPEGA PG-9025 can handle 4 different device modes when pairing, but only one makes sense for Steam gaming - Joystick Mode, so I pressed X and Home keys together and pairing was successful in a minute.
Steam does not see my gamepad /dev/input/js0
and I absolutely don't know how to fix it.