Roger Heflin wrote:
> ...what PCI latency message is it...

# fgrep -i latency /var/log/dmesg.0
[33.177423] PCI: Setting latency timer of device 0000:00:08.0 to 64
[35.988363] PCI: Setting latency timer of device 0000:00:02.0 to 64
[36.153209] PCI: Setting latency timer of device 0000:00:02.1 to 64
[36.313148] PCI: Setting latency timer of device 0000:00:02.2 to 64
[38.837823] PCI: Setting latency timer of device 0000:00:0d.0 to 64
[38.897106] PCI: Setting latency timer of device 0000:00:04.0 to 64
[60.710413] ivtv0: Unreasonably low latency timer, setting to 64 (was 32)
[61.096095] PCI: Setting latency timer of device 0000:00:06.0 to 64
[67.561088] ivtv1: Unreasonably low latency timer, setting to 64 (was 32)


I looked into this back when I first deployed the system in the Fall of 
2006, and I don't recall what I found, but I'm pretty sure I never 
implemented any fixes.


> ...and how often does it lockup...

It locks up some of the time when I transcode using mencoder, and once 
when using ffmpeg. I used mencoder to transcode only rarely, and stopped 
using it because of this.

I was hoping the problem would go away when I upgraded Ubuntu from 
Fiesty to Gutsy, which I did a few weeks ago, but I haven't tried 
mencoder again. I have, however, found that ffmpeg now generates an 
error when ran from nuvexport. I need to dig into that.


> ...and what exactly do the lockups look like?

Black screen or normal looking but frozen screen. Unresponsive to 
network connections or existing ssh connections.


> My Sempron has a VIA chipset.

NVIDIA nForce2 chipset.


> I know if you have too many dimms and/or are running them too fast 
> things get unstable (a crash a week under heavy load).

When the system was originally built the RAM wouldn't run stable at the 
manufacturer's specified parameters, but I backed off on them, and the 
system otherwise runs stable. It seems unlikely to be a RAM issue, as 
I've had other occasions to stress the RAM that didn't involve 
transcoding, which didn't result in lockups.

Lately, with RAM being so cheap, I've been thinking about replacing the 
1 GB of RAM with 2 GB and faster, though I suspect this board is old 
enough that it requires the less popular and more expensive DDR RAM 
rather than DDR2.

  -Tom

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