[mythtv-users] stutter while recording two programs at once

Brad DerManouelian myth at dermanouelian.com
Mon Sep 11 14:25:59 UTC 2006


On Sep 11, 2006, at 5:31 AM, Steven Adeff wrote:

> On 9/10/06, Brad DerManouelian <myth at dermanouelian.com> wrote:
>> On Aug 29, 2006, at 6:43 PM, Judd Tracy wrote:
>>> Try taking a look at this:
>>> http://www.mythtv.org/wiki/index.php/PCI_Latency
>>>
>>> Judd
>>
>> /sbin/lspci -v
>> tells me:
>> 00:07.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller
>> (rev f3) (prog-if 85 [Master SecO
>> PriO])
>>          Subsystem: ASUSTeK Computer Inc.: Unknown device 815a
>>          Flags: bus master, 66Mhz, fast devsel, latency 0, IRQ 225
>>          I/O ports at 09f0 [size=8]
>>          I/O ports at 0bf0 [size=4]
>>          I/O ports at 0970 [size=8]
>>          I/O ports at 0b70 [size=4]
>>          I/O ports at d800 [size=16]
>>          Memory at ad002000 (32-bit, non-prefetchable) [size=4K]
>>          Capabilities: <available only to root>
>>
>> 00:08.0 IDE interface: nVidia Corporation CK804 Serial ATA Controller
>> (rev f3) (prog-if 85 [Master SecO
>> PriO])
>>          Subsystem: ASUSTeK Computer Inc. K8N4-E Mainboard
>>          Flags: bus master, 66Mhz, fast devsel, latency 0, IRQ 233
>>          I/O ports at 09e0 [size=8]
>>          I/O ports at 0be0 [size=4]
>>          I/O ports at 0960 [size=8]
>>          I/O ports at 0b60 [size=4]
>>          I/O ports at c400 [size=16]
>>          Memory at ad001000 (32-bit, non-prefetchable) [size=4K]
>>          Capabilities: <available only to root>
>>
>> So I did this:
>> [mythtv at mythtv ~]$ sudo /sbin/setpci -v -s 00:07.0 latency_timer=b0
>> 00:07.0:0d b0
>> [mythtv at mythtv ~]$ sudo /sbin/setpci -v -s 00:08.0 latency_timer=b0
>> 00:08.0:0d b0
>>
>> But /sbin/lspci -v still tells me latency 0 for both devices.
>>
>> I feel dumb that I can't read directions and get this to work how I
>> think it will work.
>
> My PATA/SATA interfaces are also set to latency=0. My onboard SATA is
> set to 0 and I can't change it, but my PCI PATA card default sets to
> 32, which causes all sorts of problems, so I force the PATA card to 0
> as part of my mythbackend startup script (they control my RAID10
> recordings array). I've not noticed any issues with this.

My PATA device is also set to 0. Unfortunately it is causing major  
issues for me. I feel like I made a big mistake in buying AMD64. I've  
thrown about $3500 into this box in hopes that I would be ahead of  
the game and not experience the issues of lower-end hardware. Seems  
like there's no winning.


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