On Sun, 1 Apr 2007, Matthias Urlichs wrote: > Hi, > > On current kernels (at least 2.6.19 to current -- I can't test older ones), > realtime processes cause USB resets on my system. > > I'm running pulseaudio with realtime privileges. This happens: > > [23496.395029] usb 6-3.2.1: reset low speed USB device using ehci_hcd and > address 42 > [23496.937542] usb 6-3.1: reset low speed USB device using ehci_hcd and > address 39 > [23512.660307] usb 6-3.2.1: reset low speed USB device using ehci_hcd and > address 42 > [23513.699371] usb 6-3.1: reset low speed USB device using ehci_hcd and > address 39 > [23531.379236] usb 6-3.2.1: reset low speed USB device using ehci_hcd and > address 42 > [23553.950417] usb 6-3.2.1: reset low speed USB device using ehci_hcd and > address 42 > [23565.124676] usb 6-3.2.1: reset low speed USB device using ehci_hcd and > address 42 > > The devices in question happen to be my mouse and keyboard. :-/ > Unfortunately the keyboard manages not to survive that reset (it starts > losing events, which is kindof inconvenient when the lost event is a > key-up) and needs to be unplugged to resume working. > > I don't have audio (or anything else that's active, in fact) on my USB. > > Ideas where to start debugging this are appreciated.
A good place to start would be to use usbmon (see Documentation/usb/usbmon.txt). It also wouldn't hurt to turn on CONFIG_USB_DEBUG. Alan Stern ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
