i can second this from Gentoo Linux and pcsx-r 1.9.92.
couldn't make MGS use analog axes. also, some documentation or hints about stuff like F5 button and video plugin in-game switches (del, end, etc.) would be nice.
in epsxe pushing F5 also shows analog/digital indicator on top right corner of the screen. there is nothing in pcsx-r so i not sure what exactly happening.
but in Resident Evil 2 nor d-pad nor left stick works after pressing F5 switch until it pressed again.
there is no support for force feedback found on such gamepads (and linux drivers for them) either.
my is "044f:b323 ThrustMaster, Inc. Dual Trigger 3-in-1 (PC Mode)".
otherwise working nice, thanks.