Hi, I'm using Logitech K520 keyboard M310 mouse, wirelessly connected to unifying receiver. If I plug the receiver into usb-switch the computer crashes, in average after 30 minutes. The crash does not leave any trace on host: sometimes computer hard-hangs, sometimes it reboots. The receiver works fine if connected right into the host. The usb-switch (I've tried two) works fine with many other devices causing no problems. The crash does not happen if receiver is plugged via simple usb extension cable, only plugging it after the usb-switch causes it. It took me a while to find a root of this problem as there is no evidence on what went wrong and it's hard to connect the fact that you just replugged the receiver somewhere else with a silent reboot few hours ago (yes, sometimes it can take a while to trigger). I was suspecting other bugs in kernels or problems with my hardware, but after a lot of testing, I've finally connected the dots and where able to reproduce this in enough situations to be sure about this behaviour. I've been experiencing the problem with dozens of kernels, tried Ubuntu 11.10 and 12.04 (beta) so far. I have not tried different set of mouse/keyboard/receiver but as they work fine plugged right into the host, I don't suspect they have any issues. Even so, I guess even plugging broken device into usb bus should not cause host to reboot. I'd be happy to help debugging this if anyone is interested. I can provide more information on my host/setup and try patches. Best Regards, -- Dawid Ciężarkiewicz -- 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
