Re: av7110 error reporting

[Oliver Endriss <o.endriss@gmx.de>]

Hi,

Johan wrote:
> I need some guidance on error messages..
> 
> The machine receives these messages in the systemlog (dmesg)
> 
> [ 7673.168026] dvb-ttpci: StartHWFilter error  buf 0b07 0010 07e9 b96a  
> ret 0  handle ffff
> [ 7674.192025] dvb-ttpci: StartHWFilter error  buf 0b07 0010 07ee b96a  
> ret 0  handle ffff
> [ 7675.224025] dvb-ttpci: StartHWFilter error  buf 0b07 0010 07f3 b96a  
> ret 0  handle ffff
> [ 7676.248128] dvb-ttpci: StartHWFilter error  buf 0b07 0010 07f9 b96a  
> ret 0  handle ffff
> [ 7677.280026] dvb-ttpci: StartHWFilter error  buf 0b07 0010 07fd b96a  
> ret 0  handle ffff
> [ 7678.312025] dvb-ttpci: StartHWFilter error  buf 0b07 0010 0803 b96a  
> ret 0  handle ffff
> 
> These start as soon as I view or record a channel, and obviously fills 
> up the log quickly.
> 
> I believe the code that generates these messages is at the bottom of 
> this message (part of av7110.c). This code was introduced in 2005 to 
> improve error reporting.

True.

> Currently I run today's v4l-dvb (using a hg update), and kernel 
> 2.6.31-16. (Ubuntu), however the issue occurred in older combinations as 
> well (over a year ago), so it is not introduced by the last kernels or 
> DVB driverset.
>
> The message seems to be triggered by the variable "handle" being larger 
> then 32. On my system it always reports ffff.

Handle == ffff means that the av7110 was not able to create a new filter
entry. This will happen if there are already 32 active filters.

Does it happen for all channels, or only for a specific one?
If the latter is true: Which channel is causing the problem?
Does it have a large number of audio pids?

> Am I looking at faulty hardware, or can I resolve this issue more 
> elegant than just disabling the fault report?
> (keep in mind that I do not have a programming/coding background)

You may disable the warning, but be warned that some parts of the data
will not be recorded due to missing filter entries...

Oliver

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