On Sun, 2 Aug 2015, Jakob Schürz wrote: > # uname -a > Linux aldebaran 4.0.0-2-amd64 #1 SMP Debian 4.0.8-2 (2015-07-22) x86_64 > GNU/Linux > # cat /sys/kernel/debug/usb/devices > > T: Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=5000 MxCh= 4 > B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0 > D: Ver= 3.00 Cls=09(hub ) Sub=00 Prot=03 MxPS= 9 #Cfgs= 1 > P: Vendor=1d6b ProdID=0003 Rev= 4.00 > S: Manufacturer=Linux 4.0.0-2-amd64 xhci-hcd > S: Product=xHCI Host Controller > S: SerialNumber=0000:00:14.0 > C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA > I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms > > T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 9 > B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0 > D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1 > P: Vendor=1d6b ProdID=0002 Rev= 4.00 > S: Manufacturer=Linux 4.0.0-2-amd64 xhci-hcd > S: Product=xHCI Host Controller > S: SerialNumber=0000:00:14.0 > C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA > I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms So the troublesome device and a few others all lie on the full-speed/high-speed bus attached to an xHCI controller. > T: Bus=02 Lev=01 Prnt=01 Port=03 Cnt=01 Dev#= 3 Spd=12 MxCh= 0 > D: Ver= 2.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1 > P: Vendor=0bda ProdID=b001 Rev= 2.00 > S: Manufacturer=Realtek > S: Product=Bluetooth Radio > S: SerialNumber=00e04c000001 > C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=500mA > I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=rtk_btusb > E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms > E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms > E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms > I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=rtk_btusb > E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms > E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms > I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=rtk_btusb > E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms > E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms > I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=rtk_btusb > E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms > E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms > I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=rtk_btusb > E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms > E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms > I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=rtk_btusb > E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms > E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms > I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=rtk_btusb > E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms > E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms > > T: Bus=02 Lev=01 Prnt=01 Port=04 Cnt=02 Dev#= 4 Spd=12 MxCh= 0 > D: Ver= 1.10 Cls=ff(vend.) Sub=12 Prot=ff MxPS= 8 #Cfgs= 1 > P: Vendor=138a ProdID=003f Rev= 1.04 > S: SerialNumber=0020e21ccd95 > C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=100mA > I:* If#= 0 Alt= 0 #EPs= 4 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none) > E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms > E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms > E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms > E: Ad=83(I) Atr=03(Int.) MxPS= 8 Ivl=4ms Do you happen to know what this device is? > T: Bus=02 Lev=01 Prnt=01 Port=06 Cnt=03 Dev#= 5 Spd=480 MxCh= 0 > D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1 > P: Vendor=05c8 ProdID=0374 Rev= 1.01 > S: Manufacturer=SunplusIT INC. > S: Product=HP HD Webcam > C:* #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=500mA > A: FirstIf#= 0 IfCount= 2 Cls=0e(video) Sub=03 Prot=00 > I:* If#= 0 Alt= 0 #EPs= 1 Cls=0e(video) Sub=01 Prot=00 Driver=uvcvideo > E: Ad=87(I) Atr=03(Int.) MxPS= 16 Ivl=16ms > I:* If#= 1 Alt= 0 #EPs= 0 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo > I: If#= 1 Alt= 1 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo > E: Ad=81(I) Atr=05(Isoc) MxPS= 192 Ivl=125us > I: If#= 1 Alt= 2 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo > E: Ad=81(I) Atr=05(Isoc) MxPS= 384 Ivl=125us > I: If#= 1 Alt= 3 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo > E: Ad=81(I) Atr=05(Isoc) MxPS= 512 Ivl=125us > I: If#= 1 Alt= 4 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo > E: Ad=81(I) Atr=05(Isoc) MxPS= 640 Ivl=125us > I: If#= 1 Alt= 5 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo > E: Ad=81(I) Atr=05(Isoc) MxPS= 800 Ivl=125us > I: If#= 1 Alt= 6 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo > E: Ad=81(I) Atr=05(Isoc) MxPS= 944 Ivl=125us > I: If#= 1 Alt= 7 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo > E: Ad=81(I) Atr=05(Isoc) MxPS=1280 Ivl=125us > I: If#= 1 Alt= 8 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo > E: Ad=81(I) Atr=05(Isoc) MxPS=1600 Ivl=125us > I: If#= 1 Alt= 9 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo > E: Ad=81(I) Atr=05(Isoc) MxPS=1984 Ivl=125us > I: If#= 1 Alt=10 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo > E: Ad=81(I) Atr=05(Isoc) MxPS=2880 Ivl=125us > I: If#= 1 Alt=11 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo > E: Ad=81(I) Atr=05(Isoc) MxPS=3060 Ivl=125us > > T: Bus=02 Lev=01 Prnt=01 Port=07 Cnt=04 Dev#= 21 Spd=12 MxCh= 0 > D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 > P: Vendor=e3b4 ProdID=0811 Rev= 1.00 > S: Manufacturer=AC209N > S: Product=AC209N > C:* #Ifs= 4 Cfg#= 1 Atr=80 MxPwr=400mA > I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage > E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms > E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms > I:* If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio > I:* If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio > I: If#= 2 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio > E: Ad=02(O) Atr=09(Isoc) MxPS= 192 Ivl=1ms > I:* If#= 4 Alt= 0 #EPs= 2 Cls=03(HID ) Sub=00 Prot=00 Driver=usbhid > E: Ad=82(I) Atr=03(Int.) MxPS= 8 Ivl=1ms > E: Ad=02(O) Atr=03(Int.) MxPS= 8 Ivl=1ms Mathias, is it possible that the xHCI hardware or driver is getting confused by the fact that the interfaces are numbered 0, 1, 2, 4 instead of 0, 1, 2, 3? > T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 2 > B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0 > D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 > P: Vendor=1d6b ProdID=0002 Rev= 4.00 > S: Manufacturer=Linux 4.0.0-2-amd64 ehci_hcd > S: Product=EHCI Host Controller > S: SerialNumber=0000:00:1d.0 > C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA > I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms > > T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 8 > D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1 > P: Vendor=8087 ProdID=8000 Rev= 0.04 > C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA > I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=256ms Does it make any difference if you remove the Bluetooth radio and the HP webcam? They compete for bandwidth on the same bus as the AC209N speakers. In theory there should be plenty of bandwidth for all these devices to run at the same time. Still, it's worth checking. 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
