joypad stop's working after update to 1.0 (linux version)

[gynodroghi]

hi to all,
I'm using ppsspp on ubuntu 14.04 since some weeks, it worked perfectly with lot of games unitl the upgrade to version 1.0, just after the upgrade my joypad totally stops to work, it is still recoignized by ppsspp but no button is functioning, I tried to reconfigure it, I try to reinstall ppsspp but nothing changes. Of course the joypad works perfectly with other applications.
The joypad is a cheap Extreme Force shock pro model 04270; it is recoignized natively by linux kernel (no 3rd party drivers needed), it works perfcetly in native linux games and also through Wine.

is there any tip? I installed ppsspp through the ppa, is there a way to rollback to the older version? thank u in advice