From: Mauro Carvalho Chehab <mchehab@redhat.com>
To: "Frank Schäfer" <fschaefer.oss@googlemail.com>
Cc: linux-media@vger.kernel.org
Subject: Re: Mysterious USB device ID change on Hauppauge HVR-900 (em28xx)
Date: Fri, 23 Nov 2012 18:10:49 -0200 [thread overview]
Message-ID: <20121123181049.6ee0f487@redhat.com> (raw)
In-Reply-To: <50AFABDA.9050309@googlemail.com>
Em Fri, 23 Nov 2012 18:01:14 +0100
Frank Schäfer <fschaefer.oss@googlemail.com> 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
prev parent reply other threads:[~2012-11-23 20:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-23 17:01 Mysterious USB device ID change on Hauppauge HVR-900 (em28xx) Frank Schäfer
2012-11-23 17:20 ` Antti Palosaari
2012-11-23 19:24 ` Frank Schäfer
2012-11-23 20:10 ` Mauro Carvalho Chehab [this message]
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