On Fri, Aug 07, 2020 at 02:27:00PM +0200, Mark Kettenis wrote: > > Date: Fri, 7 Aug 2020 12:31:39 +0200 > > From: Alexandre Ratchov <a...@caoua.org> > > > > 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. >
FWIW, I have a powered USB3 hub that let's everything work through my USB 3 port. Otherwise several things won't work except through the USB 2 port. (USB 2 devices) I have a powered hub due to using a hard drive and WiFi. Just thought it worth mentioning on this topic. Chris Bennett
