Hi, On 04/01/17 13:19, B&A Consultants wrote: > Preparing a computer with kernels 4.8.15 and 4.9.0 (last available on > Gentoo). Same erratic behaviour on 4.8.15 and 4.9.0. With the same symptom : when the key is properly detected/taken into account, we have a usbhid_restart_ctrl_queue:238: hid-generic 0003:2581:F1D0.0005: Kicking head 1 tail 0 message in syslog. When it fails, this message does not appear. Some quirks we noted with those two kernels : - key detect sometimes takes 5 to 10 seconds after key insert into the port. It does not seem to have any impact on whether the key will be usable : [4.8.15] Jan 5 10:45:50 kernel: usb 3-2: new full-speed USB device number 33 using xhci_hcd Jan 5 10:46:01 kernel: usb 3-2: New USB device found, idVendor=2581, idProduct=f1d0 [4.9.0] Jan 5 11:01:32 kernel: usb 3-6: new full-speed USB device number 34 using xhci_hcd Jan 5 11:01:37 kernel: usb 3-6: New USB device found, idVendor=2581, idProduct=f1d0 - with 4.9.0 at least, when the key has failed on a port, it seems to be *very difficult* to get it to be properly processed again on this port. Only way we found (but it may be purely irrelevant to the real problem) is to connect/disconnect some hub with several devices on it. Those tests have been performed on the same computer. This evening (CET timezone), we will test on two other computers. Sincerely, -- Pierre-Yves Bonnetain-Nesterenko -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
