[mythtv-users] Error: offset>181

[John Pilkington]

On 02/08/14 09:16, Peter Bienstman wrote:
> Hi,
>
> I only have a single tuner, and the same issue also pops up (albeit less
> frequently) if I disable EIT scanning, so that's not the root cause.
>
> Anyway, I would guess that race conditions are bugs to be fixed :-)
>
> Cheers,
>
> Peter

In case it's relevant, in this thread I have been using a single 
DVB-T/T2 USB tuner that has been recording only DVB-T programmes; but I 
suppose it must scan the DVB-T2 muxes too...

John

>> -----Original Message-----
>> From: mythtv-users-bounces at mythtv.org [mailto:mythtv-users-
>> bounces at mythtv.org] On Behalf Of Karl Dietz
>> Sent: 02 August 2014 09:32
>> To: mythtv-users at mythtv.org
>> Subject: Re: [mythtv-users] Error: offset>181
>>
>> On 02.08.2014 07:59, Peter Bienstman wrote:
>>
>>> Actually, I can get this to fail more reliably if I turn on active EIT
> scan.
>>
>>> Also, turns out my syslog is full of messages like
>>>
>>> [  128.728029] cx23885_wakeup: 18 buffers handled (should be 1) [
>>> 128.828029] cx23885_wakeup: 17 buffers handled (should be 1)
>>
>> The active EIT scanner will change channels way more often then normal
>> recording duties. As a side effect it will trigger race conditions, e.g.
> when a
>> driver misses proper locking of a shared I2C bus on a dual tuner card,
> more
>> often.
>>
>> On my dual DVB-T card I had dropouts/lost data in recordings every time
> the
>> other tuner was changing channels.
>>
>> As a band aid you can set the recorder order and enable/disable active
>> scanning so only one tuner per card is used for active scanning and that
> this is
>> the first tuner of that card that is used for recordings.
>> Basically avoiding concurrent recordings and active scan on the same card.
>>
>> Regards,
>> Karl