On Fri, 7 Aug 2020 12:31:39 +0200
Alexandre Ratchov <a...@caoua.org> wrote:
> On Fri, Aug 07, 2020 at 10:08:25AM +0100, Patrick Harper wrote:
> > I think asynchronous transfers don't work with xhci right now,
> > which appears to be how your DAC works. If you can disable USB 3.0
> > in the BIOS/UEFI setup program it should work.
xhci(4) does support isochronous transfers.
> This device is usb1.1, it uses control and isochronous transfers that
> xhci supports. Strangely, even certain control transfers fail with
> this particular device.
Hmm weired. I'm still puzzled by the lsusb output which seem to miss
most of the uaudio device descritpor. Could that be the reason?
jmc:
Can you please provide usbdevs -v output and then only output of lsusb
for that specific uaudio device from the ehci and from the xhci machine?
# usbdevs -v
...
# lsusb
...
# lsusb -d xxxx:xxxx -vvv
...
I would like compare if the lsusb output differs between ehci and xhci.
