Re: USB device fails to attach

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Mon, 4 Aug 2025 01:09:10 +0300
    From:        Valery Ushakov <uwe%stderr.spb.ru@localhost>
    Message-ID:  <aI_eBgKDa6OFX8OT%snips.stderr.spb.ru@localhost>

  | I am trying to use an old CF card reader.
  |   umass0 at uhub0 port 1 configuration 1 interface 0
  |   umass0: JetFlash (0x8564) Mass Storage Device (0x1000), rev 3.00/11.00, addr 17
  |   ...
  |
  | Any leads on how do I debug this?  TIA.

If that's all you're getting for it, there's nothing to debug.   Literally.

That is, it appears that we have no driver which matches that device,
so there is nothing in which bugs can appear.   You'd either need to
locate a driver which will support that device, and add its info to
its attach tables (and then debug that driver's support for it, if it
doesn't "just work"), or write a whole new one, depending upon how similar
its hardware is to something we already support.

kre