For a while when i tried to boot xell on my slim trinity it would get the blue xell screen and start to boot. Then pow, red error screen (segmentation fault) and i could not figure it out. Today i figured out what the problem is , Triton primer wireless headset transmitter. If the wireless headset transmitter is plugged in the the 360 for power xell gets the segmentation fault error everytime. Soo if anyone is experiencing a segmentation fault with xell , unplug all the USB devices from the console and try and eliminate what is causing the issue. I use xell to launch a N64 emu i use on occasion and the error was making me batty . hope this might help someone.