On Thursday 18 July 2013 16:28:01 Peter Hurley wrote: > Before we revert to using the workaround, I'd like to suggest that > this new "hidden" problem may be an interaction with the xhci_hcd host > controller driver only. > > Looking at the related bug, the OP indicates the machine only has > USB3 ports. Additionally, comments #7, #100, and #104 of the original > bug report add additional information that would seem to confirm > this suspicion. > > Let me add I have this USB device running on the uhci_hcd driver > with or without this workaround on v3.10. This problem does not seem specific to xhci, uhci seems also effected. Today I upgraded a system (running Arch Linux) from kernel 3.9.9 to 3.10.5. After a reboot to 3.10.5, things broke. The setup: - There are two USB receivers plugged into USB 1.1 ports (different buses according to lsusb, uhci), each receiver is paired to a K360 keyboard. - One of the receivers are passed to a QEMU guest with -usbdevice host:$busid. $devid. This keyboard is working (probably because QEMU performed a reset). - Since 3.10.5, the keyboard that is *not* passed to the QEMU guest is not functioning on reboot. After closing the QEMU guest, the USB bus gets reset(?) after which the other keyboard suddenly gets detected. I had only booted 3.10.5 twice before rolling back to 3.9.9, both boots triggered the issue. Do I need to provide a usbmon, lsusb, dmesg and/ or other details from 3.10.5? Note that there are other Arch Linux users who have reported issues[1][2] since upgrading to 3.10.z. Triggering a re-enumeration by writing the magic HID++ message[3] makes the paired devices appear again (as reported in forums[1], I haven't tried this on the affected UHCI machine). While the underlying bug is fixed, can this patch be forwarded to stable? I see that 3.10.6 has been released, but still without this patch. Regards, Peter [1]: https://bbs.archlinux.org/viewtopic.php?id=167210 [2]: https://bugs.archlinux.org/task/35991 [3]: https://bbs.archlinux.org/viewtopic.php?pid=1309535#p1309535 -- 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
