Am 2015-08-04 um 08:14 schrieb Clemens Ladisch:
Alan Stern wrote:
On Sun, 2 Aug 2015, Jakob Schürz wrote:
P: Vendor=138a ProdID=003f Rev= 1.04
Do you happen to know what this device is?
usb.ids says Validity Sensors VFS495 Fingerprint Reader.
Yes it's true. But I don't use this Finger-Print-Reader. (Even it
doesn't work for me...)
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.
All these devices have (small) interrupt endpoints for some kind of
status reporting. It might be possible that the sheer number of
periodically scheduled transactions overflows some limit in the firmware
or driver.
Sounds bad... :-(
Jakob Schürz
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