Brian Beardall wrote: >I've been experiencing IRQ don't cares using webcams that use >isochronous transfers. These are reproducible on different >mainboards. The one is an MSI-6195, and the other is a MSI-6167. The >bottom two kernel logs occured after usb debugging was enabled. I am >not quite sure why the USB controller is dying like this. I have double >checked the drivers, but they are only starting the transfer. I would >do testing on more mainboards with the AMD 756 southbridge, but I only >have two. The crash is a little unpredictable. Sometimes it takes 10 >seconds to crash the controller, and other times it can run for 12 hours >without an IRQ don't care. Here are some of the kernel messages: > > > This is how the isochronous transfer is setup:
urb->number_of_packets = 10; urb->intervral = 1; urb->transfer_flags = USB_ISO_ASAP; Those two settings lockup the AMD 756 USB controller. ------------------------------------------------------- SF.Net email is sponsored by: Tell us your software development plans! Take this survey and enter to win a one-year sub to SourceForge.net Plus IDC's 2005 look-ahead and a copy of this survey Click here to start! http://www.idcswdc.com/cgi-bin/survey?id=105hix _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
