[LAU] Teufel PC Bamster not getting connected on USB?

[Clemens Ladisch]

David Kastrup wrote:
> Clemens Ladisch writes:
>> David Kastrup wrote:
>>> I just got some older Bamster soundbar model (probably not a keeper)
>>> that takes USB either for power (in which case it uses AUX in analog) or
>>> also as USB soundcard.  In the latter case, however, it just switches
>>> itself off after a few seconds.
>>>
>>> [ 1201.960192] usb 5-2: new full-speed USB device number 5 using uhci_hcd
>>> [ 1203.344305] usbhid 5-2:1.3: can't add hid device: -71
>>> [ 1203.456336] usb 5-2: USB disconnect, device number 5
>>
>> I'd guess that the firmware tries to detect if it is connect to an actaual
>> PC (as opposed to some charger), and that Linux doesn't look right.
>
> You sure that it's the Bamster taking the initiative here?

The host hardware is not capable of causing the "disconnect" message.

> it sounds more like Linux does something bad here.  Should it respond
> differently to any request?

I guess the Bamster expects it to behave identical with the Windows driver.


Regards,
Clemens