On Fri, 5 Aug 2005, Carles Pina i Estany wrote: > In host computer, in /var/log/messages: > ug 4 15:21:14 pinux kernel: usb 1-1: new full speed USB device using > uhci_hcd and address 18 > Aug 4 15:21:26 pinux kernel: usb 1-1: new full speed USB device using > uhci_hcd and address 19 > Aug 4 15:21:44 pinux kernel: usb 1-1: new full speed USB device using > uhci_hcd and address 20 > Aug 4 15:21:55 pinux kernel: usb 1-1: new full speed USB device using > uhci_hcd and address 21 > > (repeating it...) > > And in /var/log/debug, with HCD debug enabled: > Aug 4 15:21:14 pinux kernel: hub 1-0:1.0: state 5 ports 2 chg 0000 evt > 0002 > Aug 4 15:21:14 pinux kernel: uhci_hcd 0000:00:1d.0: port 1 portsc > 0093,00 > Aug 4 15:21:14 pinux kernel: hub 1-0:1.0: port 1, status 0101, change > 0001, 12 Mb/s > Aug 4 15:21:14 pinux kernel: hub 1-0:1.0: debounce: port 1: total 100ms > stable 100ms status 0x101 > Aug 4 15:21:15 pinux kernel: usb 1-1: khubd timed out on ep0in len=8/64 > Aug 4 15:21:21 pinux kernel: usb 1-1: khubd timed out on ep0out len=0/0 > Aug 4 15:21:26 pinux kernel: usb 1-1: khubd timed out on ep0out len=0/0 > Aug 4 15:21:27 pinux kernel: usb 1-1: khubd timed out on ep0in len=0/64 > Aug 4 15:21:28 pinux kernel: usb 1-1: khubd timed out on ep0in len=0/64 > Aug 4 15:21:29 pinux kernel: usb 1-1: khubd timed out on ep0in len=0/64 > Aug 4 15:21:34 pinux kernel: usb 1-1: khubd timed out on ep0in len=0/64 > Aug 4 15:21:39 pinux kernel: usb 1-1: khubd timed out on ep0in len=0/64 > Aug 4 15:21:44 pinux kernel: usb 1-1: khubd timed out on ep0in len=0/64 > Aug 4 15:21:49 pinux kernel: usb 1-1: khubd timed out on ep0out len=0/0 > Aug 4 15:21:55 pinux kernel: usb 1-1: khubd timed out on ep0out len=0/0 > Aug 4 15:22:00 pinux kernel: usb 1-1: khubd timed out on ep0out len=0/0 > Aug 4 15:22:05 pinux kernel: usb 1-1: khubd timed out on ep0out len=0/0 > (endless) > > And, if I type lsusb in host computer, lsusb hangs... until I disconnect > the USB cable (no Control+C break, so it is some kind of thing in > Kernel-host computer) > > Does anyone have had that kind of problem?
This sort of thing was reported before, and a patch was posted (sorry I don't have a URL). It's caused by a device constantly disconnecting and reconnecting, monopolizing the khubd thread and preventing other processes (like lsusb) from doing their work. Alan Stern ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
