[linux-dvb] Freecom DVB-T USB with 14aa:0225 - one physical device but loaded twice

Alan Chandler alan at chandlerfamily.org.uk
Mon Oct 2 21:50:23 CEST 2006


On Monday 02 October 2006 16:07, d-PUNk wrote:
> Hi!
>
> I am using a Freecom DVB-T usb device which has the usb id 14aa:0225
> before the driver / firmware is loaded. My system is gentoo linux with
> 2.6.17-gentoo-r8 kernel source. I download the latest snapshot of the
> linux-dvb drivers via mercurial and installed them. I took the firmware
> named dvb-usb-wt220u-fc03.fw. When I modprobe dvb_usb_dtt200u I get:
...

> Now I am quite confused why I find two directories in /dev/dvb named
> adapter0 and adapter1 with
>
> adapter0:
>
> crw-rw---- 1 root video 212, 4  2. Okt 16:50 demux0
> crw-rw---- 1 root video 212, 5  2. Okt 16:50 dvr0
> crw-rw---- 1 root video 212, 3  2. Okt 16:50 frontend0
> crw-rw---- 1 root video 212, 7  2. Okt 16:50 net0
>
> adapter1
>
> crw-rw---- 1 root video 212, 68  2. Okt 16:50 demux0
> crw-rw---- 1 root video 212, 69  2. Okt 16:50 dvr0
> crw-rw---- 1 root video 212, 67  2. Okt 16:50 frontend0
> crw-rw---- 1 root video 212, 71  2. Okt 16:50 net0
>
>
> I can dvbscan on both adapters with correct behaviour (but not at the
> same time) and vlc shows tv when using the generated channels.conf.
>
> I would like to use vdr for recording but this gives me a lot of errors
> (adapter1/demux0: too many open files ... and more).
>
> Can anyone tell me why I got to devices? dmesg looks to me like the
> firmware loads twice. Also two ir-receiver are registered and the
> class/input/inputX increases every time I unload and load the
> dvb_usb_dtt200u.
>

I have had similar problems to this, but not always, and not recently - I 
think it disappeared when I rebooted.

But I didn't have to modprobe, udev seemed to take care of it.

One thing I did discover with these devices is that the signal strength value 
is inverted.





-- 
Alan Chandler
http://www.chandlerfamily.org.uk



More information about the linux-dvb mailing list