> Date: Fri, 7 Aug 2020 12:31:39 +0200 > From: Alexandre Ratchov <[email protected]> > > 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. > > > > This device is usb1.1, it uses control and isochronous transfers that > xhci supports. Strangely, even certain control transfers fail with > this particular device.
I believe there are (still) issues with using USB 1.x devices on xhci(4). Inserting a USB 2.0 hub in the chain typically helps because in that case xhci(4) "speaks" USB 2.0 to the hub and the hub does the transaction translation.
