I've been running Cyanogen roms for a while and it doesn't support USB OTG (currently running cm11 nightlies). I've heard it has something to do with the usb connector on the phone not providing power on the cm rom or kernel. Wife's phone is still on TW and otg works every time. I've tried a couple of different kernels with cm11 but no joy.
Anyone have any luck on any AOSP roms? Thanks!