[linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e) packet loss

John Goacher linuxdvb at johngoacher.co.uk
Thu Dec 20 14:00:55 CET 2007


Manu Abraham wrote:

>>> John Goacher wrote:
>>> When i looked at the pctv452 driver it was based on a older stb0899 
>>> driver
>>> snapshot.
>>> It still is based on the same ? There were many issues fixed in newer
>>> changesets, so
>>> i don't know whether the issue that you see is really a stb0899 driver
>>> issue which has
>>> been fixed already or maybe that the pctv device requires some specific
>>> settings ? I
>>> don't know.. I don't have much info on this device.
>>>
>>> Regards,
>>> Manu
>>>
>>
>> Hi Manu,
>>
>> I was using an older snapshot, but I've now rebuilt and re-installed the
>> driver following the instructions in the wiki entry at
>> http://www.linuxtv.org/wiki/index.php/Pinnacle_PCTV_Sat_HDTV_Pro_USB_%28452e%29
>>
>> I'm using what I believe to be the latest snapshot of STB0899 which is
>> revision 5882 at http://linuxtv.org/hg/~manu/stb0899/rev/5b19ac1cddb5
>>
>> Unfortunately, I still get the packet loss problem with this snapshot.
>
>
> There can be 2 possibilities
> * some pctv452 specific setting required, due to the hardware difference
> * some unknown bug that gets explicitly noticed in a specific combination
>
> In either case, can you please put up some high resolution pictures of 
> your
> device up some place (since i don't have much of an understanding about
> your hardware configuration, hoping that the pictures might yield some 
> clues) ?
>
> Regards,
> Manu
>

I've uploaded high resolution photos of the top and underside of the pcb at 
the following URLs:

http://www.goacher.dsl.pipex.com/pctv/pctv452e_rev01_top.jpg

and

http://www.goacher.dsl.pipex.com/pctv/pctv452e_rev01_base.jpg

The device is revision 01. By the way, is there any method for getting more 
error information from the device ? Do you know whether packets in error are 
discarded by the device without being passed to the device driver ? If so, 
is there a programmable option to pass error packets through to the device 
driver and application ?

regards,
John 




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