[SOLVED] Another high DPC latency issue with sound distortion

[kallistibrc]

I'm going to go ahead and install the other Radeon HD 5800

Remember, graphics cards are often the most power hungry devices in our system, often much more so than CPUs. So you MUST ensure your power supply is capable of supporting the added demands BEFORE installing that power hungry card.

1000 watt power supply in the machine thankfully. :)

So it turns out, that the issue was in fact NOT fixed. I've been wrestling with it for awhile again but didn't want to spam the boards with more false positives etc.

I DID finally resolve the issue though. Wow. Turns out that the video card was *obliterating* the system event log with all sorts of REALLY helpful information. Hundreds of event logs, per second, all saying "UVD Information". Basically DRM for video content. This is a bug with ATI cards that has existed since around 2011. Perhaps before. Newer driver releases were SUPPOSED to fix it, but the issue still creeps up a lot.

On some machines, apparently, it causes no issues. Others the problem manifests in different ways. Sometimes it's a hard crash of the video card, os, etc etc.

In my case, the DPC latency goes through the roof. It also makes sense that it was showing as a result of the HD controllers because it's thrashing the operating system HD (hence why it didn't matter what controller I put the HD on).

Long story short, disabling this log spamming has fixed my issue. There are a few different ways to disable it, heres one: Twig's Tech Tips: ATI: Disable spamming of system event logs by ati2mtag DVD_OV UVD Information

Thank's again for all your help, and hopefully this info can be of use to other people.

 

[kallistibrc]

If you feel the problem is resolved and if the site lets you mark it as solved, you can change it.

Can't quite seem to find how to edit the original post unfortunately.

EDIT: Never mind, I found the solve button. :)

 

[Digerati]

Not sure what you mean by "edit the original post", but is not normally a good idea to go back and edit posts (except to correct minor errors, like spelling, or a missing critical word, like "not") because people following are not likely to ever see the changes. We don't get email notifications of edits. Of course, marking a thread as solved is not a problem.

 

[kallistibrc]

Heh, I thought I needed to edit the original post to change the subject. Didn't realize there was that super handy "Mark as Solved" button. :)

 

[Digerati]

No problem.

 

[Dissolution]

Can anyone help me with my latency issue? I just formatted my computer and I am still getting major latency with ataport.sys..... Why is this happening? How do I fix this?

 

[Justinwh0a]

I'm having the same problem Dissolution! I can't seem to find out how to get latencymon to stop peaking with it. If anyone can help, it would be much appreciated!

 

[PoliticalBonobo]

I'm going to go ahead and install the other Radeon HD 5800

Remember, graphics cards are often the most power hungry devices in our system, often much more so than CPUs. So you MUST ensure your power supply is capable of supporting the added demands BEFORE installing that power hungry card.

1000 watt power supply in the machine thankfully. :)

So it turns out, that the issue was in fact NOT fixed. I've been wrestling with it for awhile again but didn't want to spam the boards with more false positives etc.

I DID finally resolve the issue though. Wow. Turns out that the video card was *obliterating* the system event log with all sorts of REALLY helpful information. Hundreds of event logs, per second, all saying "UVD Information". Basically DRM for video content. This is a bug with ATI cards that has existed since around 2011. Perhaps before. Newer driver releases were SUPPOSED to fix it, but the issue still creeps up a lot.

On some machines, apparently, it causes no issues. Others the problem manifests in different ways. Sometimes it's a hard crash of the video card, os, etc etc.

In my case, the DPC latency goes through the roof. It also makes sense that it was showing as a result of the HD controllers because it's thrashing the operating system HD (hence why it didn't matter what controller I put the HD on).

Long story short, disabling this log spamming has fixed my issue. There are a few different ways to disable it, heres one: Twig's Tech Tips: ATI: Disable spamming of system event logs by ati2mtag DVD_OV UVD Information

Thank's again for all your help, and hopefully this info can be of use to other people.

This solved my same issue. If I could see you, I'd hug you and kiss you on the forehead. :hug: