On 10/04/10 17:02, Alan Stern wrote: > On Mon, 4 Oct 2010, James wrote: > >> On 10/04/10 10:55, Alan Stern wrote: >>> On Sun, 3 Oct 2010, James wrote: >>> >>>> I need help. >>>> I am trying to get an RCA VR5220 voice recorder to work with Linux. >>>> It is supposed to just mount as a mass storage device (reviews said it >>>> does on Windows and Mac so I figured it would on Linux). >>>> I don't have a Windows box I can test with. >>>> Eventually, I will track it a Windows box but I'm hoping someone here >>>> sees a problem.q >> I tried it on a Windows machine and it works there. >> I used http://www.usblyzer.com/ which seems to show problems with the >> device's compliance to the spec. >> >> I've uploaded the dmesg output and the Windows usblyzer ouput to >> http://lockie.ca/test/RCAVR5220/ >> >> I am looking at usbmon. > Here's a patch that should allow the device to work under Linux. > However, bear in mind that the device really is not compliant with the > USB spec. Given how badly it works, you may not want to rely on it. > > Alan Stern > > > Index: usb-2.6/drivers/usb/core/hub.c > =================================================================== > --- usb-2.6.orig/drivers/usb/core/hub.c > +++ usb-2.6/drivers/usb/core/hub.c > @@ -2882,8 +2882,7 @@ hub_port_init (struct usb_hub *hub, stru > else > i = udev->descriptor.bMaxPacketSize0; > if (le16_to_cpu(udev->ep0.desc.wMaxPacketSize) != i) { > - if (udev->speed != USB_SPEED_FULL || > - !(i == 8 || i == 16 || i == 32 || i == 64)) { > + if (!(i == 8 || i == 16 || i == 32 || i == 64)) { > dev_err(&udev->dev, "ep0 maxpacket = %d\n", i); > retval = -EMSGSIZE; > goto fail; > > -- > 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 > Thanks. Can you explain in laymans terms how badly out of spec it is? I doubt RCA will fix it because it one of their older products. -- 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
