will get the exact details as soon as the user is back in some 30 days.
But the drive is nothing special. Just that we have dozens and only the librem 13 complains (i did test with a intel one, before patching coreboot though)
the one i did all the testing reported in this thread and that is currently on the librem is a sabrenet 512Gb M.2 (PCIe3x4). model i believe is 2280.
In theory the controller supports all the power mgt modes correctly (APST/ASPM/L1.2) and it uses Toshiba 3d TLC nand (which some consider low quality but it’s the perfect price x perf for a desktop system imho)
I must say i have very little experience with kernel nand stuff. wouldn’t even know where to start debugging this (i planned try to force a specific ONFI api version as the driver support from 2 to 4, but i failed to even start on this)