2009/2/22 Timo Ketolainen <timo.ketolainen@xxxxxxxxxxx>: > Karsten Wiese wrote: >>> And to make things even more puzzling, after cold boot and changing >>> the threshold to 3 plugging in the Tascam gives about 8 lines with >>> non-zero data. >> >> Well, at least one encouraging result ;-) >> >>> After unplugging and replugging I get only 2 lines >>> before getting 0 as every second value. >> >> Please post above logs off-list. >> >> Thanks, >> Karsten >> > > Here you go. > > First one includes the whole boot process, and 2nd begins where 1st ends. hm, can't find the "8 good lines". 0-lengt microframes are only allowed at the very beginning. An urb ist logged (starting with "i_capture_start:632:"), if any of its packets has 0-length. The "first error spot" is still always the 2nd urb received: > Feb 22 14:56:05 halley [ 503.735412] snd-usb-us122l 2-3:1.1: usb_probe_interface > Feb 22 14:56:05 halley [ 503.735414] snd-usb-us122l 2-3:1.1: usb_probe_interface - got id > Feb 22 14:56:05 halley [ 503.735416] ALSA sound/usb/usx2y/us122l.c:539: ffff88006d695c00:1 > Feb 22 14:56:05 halley [ 503.737897] ALSA sound/usb/usx2y/us122l.c:103: 0 > Feb 22 14:56:05 halley [ 503.741179] ALSA sound/usb/usx2y/us122l.c:103: 0 > Feb 22 14:56:10 halley [ 508.744062] ALSA sound/usb/usx2y/usb_stream.c:61: idle=-18 ul=1518 ps=1536 > Feb 22 14:56:10 halley [ 508.744543] ALSA sound/usb/usx2y/usb_stream.c:61: idle=0 ul=1554 ps=1536 > Feb 22 14:56:10 halley [ 508.744558] ALSA sound/usb/usx2y/usb_stream.c:718: 205 325 > Feb 22 14:56:10 halley [ 508.744560] ALSA sound/usb/usx2y/usb_stream.c:742: 1 > Feb 22 14:56:10 halley [ 508.760387] i_capture_start:632: 0 0 30 36 30 36 36 30 36 30 36 30 36 30 36 30 36 30 36 30 36 30 36 30 36 30 36 30 > 36 30 36 30 36 36 36 30 36 30 36 30 36 30 36 30 36 30 > Feb 22 14:56:10 halley [ 508.760401] ALSA sound/usb/usx2y/usb_stream.c:61: idle=-12 ul=1524 ps=1536 > Feb 22 14:56:10 halley [ 508.766363] i_capture_start:632: 36 30 0 36 30 36 36 30 36 30 36 30 36 30 36 30 36 30 36 30 36 30 36 30 36 30 36 30 > 36 30 36 0 30 36 30 30 36 30 36 30 36 30 36 30 0 36 30 Packet at 3rd microframe empty. If things went well above log entry wouldn't show. Instead we'd see only entries like below from here on. > Feb 22 14:56:10 halley [ 508.766376] ALSA sound/usb/usx2y/usb_stream.c:61: idle=-30 ul=1518 ps=1536 I don't think your hardware is defect, more likely my patch doesn't fit this kind of ehci. An idea to make fit is "Use a single ITD per frame". Not ready yet. Thanks, Karsten -- 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
