On 1/20/08, David Brownell <[EMAIL PROTECTED]> wrote: > On Sunday 20 January 2008, Alan Stern wrote: > > On Sun, 20 Jan 2008, David Brownell wrote: > > > > > Some patches for managing periodic _completions_ have been posted > > > recently. You might try those ... I suspect they wouldn't affect > > > this behavior, but it'd be good to know for sure. > > > > > > I don't recall that you said CONFIG_USB_EHCI_TT_NEWSCHED is set. > > > Try the other setting. That affects the on-the-wire protocol. > > > > Bear in mind that Jon is using an OHCI controller, not EHCI. > > Sorry ... I thought he had posted lcpci showing a NEC controller > with EHCI *and* OHCI.
It is a NEC controller with both. But I have 1.0 hub plugged in with three 1.0 devices in it. The 1.0 hub causes the OHCI controller in the NEC to be used. I have had even worse luck trying to get three USB audio devices working on 2.0. That NEC chip is a single-TT EHCI implementation. USB plug and play sure doesn't work very well with three audio devices. I'd like to be able to use six with the NSLU2, it has enough CPU power. But I can't even get three to work reliably. So if I get a 2.0 hub with multi-TT, and plug it into the NEC chip whose EHCI hub is only single-TT, does this have a chance of working? Or will the single-TT EHCI hub mess it up? What I need are 2.0 audio devices but they don't appear to exist. > > - Dave > -- Jon Smirl [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
