@Papa-Emeritux Not related with Android 11. I had the same issue with an UT device running Focal. I reflashed with Noble => Fingerprint didn't work. I flashed Android 13 without doing anything except turning on the developer mode. Then used the installer. Boom, the fingerprint worked. I guess flashing Android erase the registered fingerprints. And with preexisting fingerprints, a fresh installation of Ubuntu Touch does not work...