On Wed, 14 Apr 2010, Pedro Ribeiro wrote: > On 14 April 2010 19:23, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > > On Wed, 14 Apr 2010, Pedro Ribeiro wrote: > > > >> The best way to trigger the issue is to connect a dib0700 based DVB > >> adapter. All you need is to connect it. Since it polls for the remote > >> control every 50 msec, it causes a constant interference. Beware that > >> on 2.6.34 this behaviour has been corrected. Other DVB adapters may > >> trigger the same issue if they also poll constatly for the rc. > > > > Your computer has two EHCI controllers, doesn't it? Can you plug the > > DVB into a different USB bus from the audio device? If you do, does > > the interference still occur? > > > > Alan Stern > > > > > > It does not matter on which ports I plug into, even if in different > buses not sharing IRQ's. Okay, good. That's important. If the problem went away when the two devices were on separate buses then it would have to be a bug in ehci-hcd. But since it didn't go away, it must be a bug in the memory/buffering code or in the hardware. 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
