On Tue, Mar 27, 2012 at 04:06:57PM +0530, shashank chaturvedi wrote: > hi sarah > I am testing the USB3.0 enumeration with new kernel 3.0.0-16. Why that kernel in particular? Why not the latest stable kernel, 3.3? > I > am using ubuntu 11.10 OS and testing device is PLDA spartan6 family board. > Issue is the Host is sending the string descriptor request with index > 238.When i Check the kern.log it shows me some different kind of > error.Please check this error which is highlighted. Highlighted...where? I don't see an attachment or anything. Please communicate in plain text, not HTML. > What is this error? Please look after this. > > kernel: [ 4714.883928] usb 4-2: USB disconnect, device number 10 > kernel: [ 4715.531807] hub 4-0:1.0: unable to enumerate USB device on port 2 > kernel: [ 4717.255563] usb 4-2: new SuperSpeed USB device number 12 using > xhci_hcd > kernel: [ 4717.272906] usb 4-2: Isoc endpoint with wBytesPerInterval of > 4096 in config 1 interface 0 altsetting 0 ep 3: setting to 2048 > kernel: [ 4717.272913] usb 4-2: Isoc endpoint with wBytesPerInterval of > 4096 in config 1 interface 0 altsetting 0 ep 131: setting to 2048 > *kernel: [ 4718.399386] usb 4-2: usbfs: USBDEVFS_CONTROL failed cmd > mtp-probe rqt 128 rq 6 len 1024 ret -110* So you're saying the USB device is choking on the get string descriptor request? Hmm, this is the second report I've received about that particular string descriptor. Maybe some userspace program changed its behavior? What are using to communicate with the device? Sarah Sharp -- 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
