Hi, USB devio rejects control messages when the index does not have the direction bit set correctly. This breaks windows apps in KVM -- and might be overly strict according to my reading of USB HID spec. Attached patch makes the kernel tolerant against it and makes the app work for me. More details in the patch header. USB experts: Please review this and judge whether this is correct, applies more generically, or maybe needs to be special cased (only for USB HID devices?) or implemented as quirk or module/kernel parameter. Once in the final form, this *might* be stable material. Please keep me in copy for the discussion, my participation on LKML is mostly reading summaries from Jonathan and Thorsten these days, unfortunately. -- Kurt Garloff Cologne, Germany