On Thu, Jan 05, 2017 at 11:46:27AM +0100, B&A Consultants wrote: > 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. Are you sure the device even works properly? It could be the device has problems returning data correctly. Can you run usbmon to see if the data is being sent/received correctly? thanks, greg k-h -- 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
