On Thu, 22 May 2014, Russel Hughes wrote: > > > > Does the Linux USB implementation supports both equally well? And also the scheduling of a mixture of both pipe types? For both USB 2 and 3? > > Do you have an idea why many commercial devices (e.g. AV applications) still would go for bulk? > > > > Thanks a lot & kind regards, > > Yves > > -- > > I have a DAC that use isochronous audio and it worked fine on USB 2.0, > then I bought an intel NUC which had USB 3.0 and it still does not > work after a couple of months of trying. Intel just say its a Linux > issue, however the people here have been very helpful and say its not > a driver issue, also I have heard it reported it works on a non intel > USB 3.0 hardware. Although I cannot say for sure, it looks like the > Intel hardware has a bug and they are reluctant to admit it. See > below. > > forums.presonus.com/posts/list/33427.page It's worth noting that the Intel erratum mentioned on that page applies to Isochronous-IN transfers only, but people report problems with Isochronous-OUT as well. Of course, there could easily be other bugs in Intel's hardware that they aren't aware of. 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
