I've followed these steps so far:
Install RetroCompat_11-2007/default.xex , as my console was asking me to upgrade if I wanted Xbox1 compatibility
Run hdd_compat_partition_fixer_v1/default.xex, to create the HDDX partition (I've launched this file from either HDD1 or USB)
Copy compatibility folder from USB or HDD1 to root of HDDX. I've tried different files I found online, from 2007, 2011, and a few others.
Try to launch Xbox1 games, either original DVDs (from standard Dash, XexMenu or FreeDashboard) or from the default.xbe(from FreeDashboard or XesMenu)
In all cases, and with all combinations I've tried, I just get a black screen and the game doesn't load. If I press the Xbox Home button, I just get a white pop-out window on top of the black screen and the console hangs. I need to switch it off to recover it.Any clue what the issue could be? The steps I've read in the tutorial seem quite simple, but I've been trying for a few days now and this doesn't seem to progress from my end...