[mythtv-users] ATSC content heavy pixel-ating every 15 sec's

[John Patrick Poet]

You also might try applying this DTV-ringbuffer patch:

http://www.gossamer-threads.com/lists/mythtv/dev/101580

to the latest CVS.

John



Yan-Fa Li wrote:

> Two problems appear obvious:
>
> 1. Your drive isn't quite set correctly, just mostly.
>
> Try adding:
>
>     hdparm -c3 /dev/hdb
>
> You can also see if your chipset will tolerate
>
>     hdparm -u1 /dev/hdb
>
> Not all of them will so you'll have to experiment to see if it causes 
> problems.
>
> 2. move drive to master on /dev/hdc
>
> You want to move the drive off the same controller as /dev/hda.  Slave 
> drives have very poor performance on IDE.  You want it to be either 
> master on /dev/hdc or on a different PCI IDE card away from your 
> DVD-ROM.  I tend to share the DVD-ROM with the second drive because 
> they are rarely active at the same time.
>
> john roberts wrote:
>
>> I'm running a CVS build from mid-Dec and I've noticed that every 15 
>> sec's on recorded content I get heavy pixel-ation (if that's a word).
>>
>> For a while I thought it was due to a weak station - but it does this 
>> for all recordings.  And the fact it does this EVERY 15 sec's makes 
>> me think there is something odd going on.
>>
>> I was thinking it might be a DMA issue - but the drive seems to be 
>> set correctly:
>>
>> htpc / # /sbin/hdparm -v /dev/hdb
>>
>> /dev/hdb:
>>  multcount    = 16 (on)
>>  IO_support   =  0 (default 16-bit)
>>  unmaskirq    =  0 (off)
>>  using_dma    =  1 (on)
>>  keepsettings =  0 (off)
>>  readonly     =  0 (off)
>>  readahead    = 256 (on)
>>  geometry     = 19929/255/63, sectors = 163928604672, start = 0
>>
>> My setup:
>>
>> - P4 3.2G
>> - Dec CVS build
>> - Gentoo
>> - HD2000
>> - HD3000
>>
>> Thanks!  Could this be a Myth issue?
>>
>> -John
>
>
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