I've been running CM12 nightlies since early 2015. Up to this point, everything has been rock-solid. While trying to upgrade from CM12 (5.0.x) to CM12.1 (5.1.x), I have lost the ability to use USB-OTG. Thinking it was a bug in CM12.1, I factory flashed 5.1 from Google's images. After rooting, I still don't have USB-OTG. StickMount doesn't help and I am no longer able to mount USB-OTG in TWRP. Do you all think this is a hardware or software issue?
xda-developers