Am 2015-08-04 um 16:27 schrieb Alan Stern:
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On Mon, 3 Aug 2015, Jakob Schürz wrote:
Am 2015-08-03 um 16:18 schrieb Alan Stern:
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
[...]
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?
[...]
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.
The Problem is... this is a Laptop, and only on one of the 4
USB-Connectors is the AC209N connected... all the other devices are fix
installed in the laptop, and I'm not able to disconnect them...
Maybe you can unload their drivers; that would be just as good:
rmmod rtk-btusb
rmmod uvcvideo
even removing this modules doesn't change the habit...
And i tried it on all 4 Connectors... every time the same...
At this point I think we will need help from Mathias Nyman, the
maintainer for the xhci-hcd driver.
Ok, so let's wait for Mathias Nyman. :)
Jakob Schürz
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