Re: Mysterious USB device ID change on Hauppauge HVR-900 (em28xx)

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Em Fri, 23 Nov 2012 18:01:14 +0100
Frank Schäfer <fschaefer.oss@xxxxxxxxxxxxxx> escreveu:

> Hi,
> 
> I've got a Hauppauge HVR-900 (65008/A1C0) today. First,  the device
> showed up as USB device 7640:edc1 (even after several unplug - replug
> cycles), so I decided to add this VID:PID to the em28xx driver to see
> what happens.
> That worked fine, em2882/em2883, tuner xc2028/3028 etc. were detected
> properly.
> Later I noticed, that the device now shows up as 2040:6500, which is the
> expected ID for this device.
> Since then, the device maintains this ID. I also checked if Windows is
> involved, but it shows up with the same ID there.

This is a known hardware bug on some HVR devices. I have this problem with
one based on tm6000: sometimes, it is not able to read from the EEPROM.
When this happens, it gets the manufacturer's default USB ID.

You may force it to use the right em28xx entry using "card=" modprobe
parameter.

-- 
Regards,
Mauro
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