> Hm, the 6.6 miniroot boots fine (as opposed to the current miniroot), > installs fine (I installed on the internal SD), and boots (dmesg below). > > So there might be a regression in miniroot-am335x-66.fs > introduced between the release of 6.6 and now.
(Actually, between Jan 13 and now.) http://stare.cz/dmesg/beaglebone-black.20200113