On Tue, 18 Aug 2009, Robin Callender wrote: > I agree, there is no wrong part (in the parsing sense) to the configuration > that I can discern. > But the device-to-host interactions do not progress to the next expected > interaction. > The next expected interaction is where the Endpoint CS > Get_Cur(SampleFrequency) is queried. > This would be the first action conducted over the configured endpoints. > There is something about this new "speaker+microphone" configuation which > windows-xp doesn't like, and is not sending Get_Cur(SampFreq). Okay. But it probably doesn't have any connection with the way the endpoints are used. Maybe your version of Windows can't handle composite audio devies (that's just a wild guess; I have no experience with USB audio devices and even less experience using them with Windows). > > It contains three interfaces. Interface 0 doesn't use any endpoints, > > interface 1 uses endpoint 1 OUT, and interface 2 uses endpoint 2 IN. > > So what makes you think there's any sharing going on? > > I have attached a kern.log section with debug spew showing what I am taking > as the sharing of the endpoint (circa line 7). > Aug 18 10:53:01 ultraman kernel: [ 1177.261318] using net2280, OUT ep-a > IN ep-a > Perhaps I am misunderstanding this spew but it looks like OUT and IN are > both using ep-a. Yes, it does look that way. Evidently there is a bug somewhere. But the host wouldn't be aware of the bug -- not until it tried to transfer some data. Alan Stern -- 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
