ARM hardware. Any of it. Installing anything on Arm requires a reticulated process of jumping through successive hoops in sequence. Rube Goldberg engineering, on LSD. Negotiating bootloader locking mechanisms to enable (within specifically timed windows) blindly hacked driver details that were originally created to comply with randomly created choices in some spaghetti code factory intended to support just about any kind of memory leak. It is effing hopeless, and will never quit being such. ARM will never leave the padded rooms of the ANDROID asylum for the crippled insane.