<html><head></head><body>I do not know the details but I did see that the Dev for the Arch VFIO kernel is making a patch for a 4.13 build due to USB issues. What kernel version are you on? <div class="gmail_quote">On October 28, 2017 5:27:15 AM PDT, "P. Pronk" <vfio@pronk.nl> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <pre class="k9mail"> I found using USB pass-through quote annoying to use on a daily basis. Having to re-attach when disconnected and vm's not starting when a USB device is missing, ugh. If you still have a free pci-e slot in your system I recommend buying an add-in USB card for ~10 in whatever your currency is and use pci-e pass-through. Makes life so much easier. Eg I used the pci-e x1 slot under my gpu for this with a low-profile pci-e riser. On 28/10/17 13:58, Patrick O'Callaghan wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;"> I've been using a USB-attached slide scanner (Ion Slidesforever) under a Windows 10 VM using QEMU/KVM USB passthrough, however it has now stopped working. The device still shows up under the Windows "device manager" console, and the scanner app doesn't complain that it can't find it. The scanner works correctly on a Windows laptop so the hardware is fine. I've also removed and reinstalled the app (you never know with Windows) but with no improvement. Under the VM the app launches but doesn't appear to receive any input, nor does it give an error message. Removing and reattaching the device in the virt-manager console (and rebooting the VM) makes no difference. Using xsane under Linux does capture an image, but unfortunately not at full resolution, so I need the proprietary Windows app and driver to work. This may have nothing to do with VFIO, but I thought I'd ask in case anyone has seen something similar. I have several thousand slides to get through :-( poc <hr /> vfio-users mailing list vfio-users@redhat.com <a href="https://www.redhat.com/mailman/listinfo/vfio-users">https://www.redhat.com/mailman/listinfo/vfio-users</a> </blockquote> <hr /> vfio-users mailing list vfio-users@redhat.com <a href="https://www.redhat.com/mailman/listinfo/vfio-users">https://www.redhat.com/mailman/listinfo/vfio-users</a> </pre></blockquote></div></body></html>