On Fri, Aug 12, 2011 at 1:50 AM, Matěj Laitl <matej@xxxxxxxx> wrote: > On 12. 8. 2011 Daniel Mack wrote: >> > This patch actually makes the sound playback _worse_. Now I get strange >> > squawks where previously at least first seconds of a song sounded >> > normally. >> > >> > However, I no longer get "zero length buffer submitted" or that "... >> > Weird." debug messages, only several megabytes of: (should I post these >> > somewhere?) >> > >> > xhci_hcd 0000:05:00.0: Giveback URB ffff880114cec000, len = 880, >> > expected = 1000, status = -115 >> > xhci_hcd 0000:05:00.0: Giveback URB ffff880114740000, len = 352, >> > expected = 1000, status = -115 >> > xhci_hcd 0000:05:00.0: underrun event on endpoint >> >> Might be the hardware doesn't like this. As I said, the patch is blindly >> written and I couldn't test it. Did you test this on a EHCI port as well? > > Good point, this patch distorts the playback also on the EHCI port. (the > playback seems to be 10 times slower than it should be) And it is only this *last* patch that causes it, yes? If that is the case, we need empty subframes in the middle of urbs, and we need to figure a way how to teach the XHCI driver to cope with that, too. Daniel -- 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
