[linux-dvb] Problems with Nova T USB 2.0 Tuning

Malcolm Smith malc at porsche.demon.co.uk
Wed May 4 09:50:34 CEST 2005

Patrick Boettcher wrote:

> Hi Malc,
> On Tue, 3 May 2005, Malc wrote:
>> The signal to the box is good, (checked with another Nova T pci card),
>> The USB box seems to install ok (see kernel below), but I cannot get 
>> scan or tzap to work... It seems to find the first multiplex, but not 
>> the rest (see trace below)
>> Is it something to do with the "will use the device's hw PID 
>> filter.", if so how do I use it? or have I done something wrong here
>> May  3 21:34:37 firebird kernel: dvb-usb: MAC address: 00:0d:fe:02:45:d5
> Btw. is this MAC address correct? (see the bottom of your box). 
> Reading this MAC address is just a guess in the driver.
>> initial transponder 754166670 0 3 9 1 0 0 0
>>>>> tune to: 
>> WARNING: filter timeout pid 0x0010
> This is because the PID filter is in use. For this box I needed to 
> have 4096 bytes URB buffers (for some reason smaller ones crashed my 
> system).
> When only one pid is filtered (especially section PIDs such as NIT 
> 0x0010) the URBs will return very lately (because they won't get 
> filled enough).
> A solution sometimes is to raise the filter-timeout by saying:
> dvbscan -5
Ok... the -5 option gives me a full list of channels (Same as I get with 
the PCI card!).. excellent!

>> ......#./tzap "BBC ONE"
>> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
>> reading channels from file '/root/.tzap/channels.conf'
>> tuning to 754166670 Hz
>> video pid 0x0258, audio pid 0x0259
> Wow, that is strange. Can you please paste the line of the 
> channels.conf for this channel?

Doh! the problem was an out of date channels.conf (and therefore wrong 
pids! - read the output!).... with the extended scan I've been to 
confirm all the channels.... thanks for the prompt help.

Now to set it up in MythTV!


btw. The instructions were pretty straightforward... you might want to 
remind people to ensure that hotplug is installed (I had to apt-get 
install them). Beyond that, I just compiled and installed!

> regards
> Patrick.
> -- 
>   Mail: patrick.boettcher at desy.de
>   WWW:  http://www.wi-bw.tfh-wildau.de/~pboettch/

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