On Sun, 1 May 2005 16:43:30 -0400, Glenn Maynard <[EMAIL PROTECTED]> wrote:
> There are two root hubs. One has a simple USB I/O board attached, which > we access directly with usbfs. [] The other has a bus-powered hub attached. > The problem only happens when that hub is attached (even with nothing on it). > When it happens, access to the I/O board times out; when the hub is removed, > I/O wakes back up and everything is happy again. >[...] > Is this likely to be caused by a poorly-shielded USB cable? Is there > anything I can do to isolate the hub further from the I/O device? I do not have a good idea, Glenn, sorry. If I were you, I would make very sure that khubd is not holding any locks while poking at bus #1 which prevent I/O at bus #2. SysRq is your friend. You can do it remotely with "echo t > /proc/sysrq-trigger". A good thing would be to use a powered hub, if your budget allows it. -- Pete ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. Get your fingers limbered up and give it your best shot. 4 great events, 4 opportunities to win big! Highest score wins.NEC IT Guy Games. Play to win an NEC 61 plasma display. Visit http://www.necitguy.com/?r=20 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
