SOLVED CPU thread usage reaches maximum when using CSL DD >>> The cause was ReShade!

Here is the follow-up report.
I recently updated Windows 11 to 25H2 and finally replaced Fanatec Control Panel and Fanalab with the new Fanatec App (v1.1.0.3).
The Wheel Base Firmware was also updated to 1.6.0.2.
However, this issue has not improved.
Still, when connecting the CSL DD with “use thread” set to true in controller.json, CPU usage spikes to 100%, and both vehicle physics and AI behavior become erratic.
Although it initially worked without issue using the same configuration, I cannot determine why this problem began surfacing partway through.
 
Last edited:
Daigo#47 said:
Here is the follow-up report.
I recently updated Windows 11 to 25H2 and finally replaced Fanatec Control Panel and Fanalab with the new Fanatec App (v1.1.0.3).
The Wheel Base Firmware was also updated to 1.6.0.2.
However, this issue has not improved.
Still, when connecting the CSL DD with “use thread” set to true in controller.json, CPU usage spikes to 100%, and both vehicle physics and AI behavior become erratic.
Although it initially worked without issue using the same configuration, I cannot determine why this problem began surfacing partway through.
Click to expand...
Try other older versions of the game.
 
(Reshade & Fanatec seems to be my issue, no solution at this time)
​
Hello.

I think I have exactly the same problem.

I also have a CSL DD, I'm on Windows 11, everything is supposedly up to date, rFactor 2 has verified the files, all the files are clean and very few cars and tracks are installed, I'm using the very latest Fanatec software as well as the latest firmware and Fanatec updates. Still on the same USB port which is perfectly functional and suitable. No changes of any kind anywhere in rFactor 2 or in the Nvidia control panel. No viruses, Windows 11 is highly optimized but as usual, no strange settings. Latest driver installed for my 2080 ti.

TWO POSSIBILITIES​

1) Use thread set to true = 100% CPU usage, out of time, unplayable and FFB lag.

2) Use thread set to false = CPU consistently at 75%, which creates very unpleasant stuttering even though I'm always between 110 and 140 frames per second.

When only the keyboard is enabled via a specific profile in rFactor 2, CPU usage is well below 30%, no stuttering.

I have a very important point to make :

This very annoying problem only occurs when I install ReShade in rFactor 2.

Even when no visual enhancements are configured or enabled in ReShade, the simple fact that it is installed and active causes this to happen.

Uninstalling ReShade = restores a smooth image without stuttering and without the problem mentioned above.

Since I don't have a problem without ReShade, you could very well tell me, "it's not a big deal, just play without it!"

Honestly, the way I configure ReShade gives me a much more realistic and natural image, much more detailed and with more realistic contrast and colors closer to what you see in real life... I really, really don't want to do without it!

I'm therefore asking for your help because I really don't know what to do anymore, and I'm frustrated at the thought of not being able to use ReShade.

According to my tests, with the keyboard profile in rFactor 2, there are no problems of any kind, even with ReShade enabled

→ There seems to be some kind of conflict between Fanatec and ReShade.

Another thing to note, I completely uninstalled the new Fanatec software and installed a driver version for my CSL DD from 12 months ago: same problem.

If anyone has any ideas, I'd be grateful... Thank you.

@Daigo#47
Were you able to solve your problem ?
 
Last edited:
pilAUTO said:
(Reshade & Fanatec seems to be my issue, no solution at this time)
​
Hello.

I think I have exactly the same problem.

I also have a CSL DD, I'm on Windows 11, everything is supposedly up to date, rFactor 2 has verified the files, all the files are clean and very few cars and tracks are installed, I'm using the very latest Fanatec software as well as the latest firmware and Fanatec updates. Still on the same USB port which is perfectly functional and suitable. No changes of any kind anywhere in rFactor 2 or in the Nvidia control panel. No viruses, Windows 11 is highly optimized but as usual, no strange settings. Latest driver installed for my 2080 ti.

TWO POSSIBILITIES​

1) Use thread set to true = 100% CPU usage, out of time, unplayable and FFB lag.

2) Use thread set to false = CPU consistently at 75%, which creates very unpleasant stuttering even though I'm always between 110 and 140 frames per second.

When only the keyboard is enabled via a specific profile in rFactor 2, CPU usage is well below 30%, no stuttering.

I have a very important point to make :

This very annoying problem only occurs when I install ReShade in rFactor 2.

Even when no visual enhancements are configured or enabled in ReShade, the simple fact that it is installed and active causes this to happen.

Uninstalling ReShade = restores a smooth image without stuttering and without the problem mentioned above.

Since I don't have a problem without ReShade, you could very well tell me, "it's not a big deal, just play without it!"

Honestly, the way I configure ReShade gives me a much more realistic and natural image, much more detailed and with more realistic contrast and colors closer to what you see in real life... I really, really don't want to do without it!

I'm therefore asking for your help because I really don't know what to do anymore, and I'm frustrated at the thought of not being able to use ReShade.

According to my tests, with the keyboard profile in rFactor 2, there are no problems of any kind, even with ReShade enabled

→ There seems to be some kind of conflict between Fanatec and ReShade.

Another thing to note, I completely uninstalled the new Fanatec software and installed a driver version for my CSL DD from 12 months ago: same problem.

If anyone has any ideas, I'd be grateful... Thank you.

@Daigo#47
Were you able to solve your problem ?
Click to expand...
Oh my goodness!
What happened to me was exactly the same as what happened to you!
I had overlooked ReShade!

After uninstalling ReShade, this problem was completely resolved.
As you said, it seems there's a conflict between rFactor2, Fanatec, and ReShade.

So, since I had saved ReShade versions from 6.1.0 to 6.6.2, I tested each one. I found that no issues occurred up to version 6.5.0, but problems started with 6.6.0 and later.
(It was my mistake to think this problem started occurring out of nowhere when I hadn't done anything. I had been updating ReShade constantly...)

Something introduced in ReShade 6.6.0 seems to be causing problems within the rFactor2 and Fanatec environment.

Which would you choose: a functional simulation or visual enhancements?
I choose the simulation.
However, this issue is intriguing, and I hope it gets resolved.
(I believe rFactor2 is not at fault here, as this is caused by third-party software.)

And I deeply appreciate your information!
 
Last edited:
@Daigo#47

Could you please confirm which version of ReShade you think works perfectly ?

Do you currently have one installed that seems to work perfectly with Fanatec ?

I think I'll be able to turn on my computer tomorrow evening.

You gave me a set of older versions that I can test; if you have a more specific one that you think works, that would be great, so as soon as I turn it on I can install it and with a bit of luck it will work straight away!
 
pilAUTO said:
@Daigo#47

Could you please confirm which version of ReShade you think works perfectly ?

Do you currently have one installed that seems to work perfectly with Fanatec ?

I think I'll be able to turn on my computer tomorrow evening.

You gave me a set of older versions that I can test; if you have a more specific one that you think works, that would be great, so as soon as I turn it on I can install it and with a bit of luck it will work straight away!
Click to expand...
My previous post contained a slight error.
After thorough verification, this issue occurs with ReShade 6.5.1 and later.
Therefore, the latest ReShade version that works perfectly with Fanatec is 6.5.0.

Past versions of ReShade can be obtained from the following site:
https://reshade.jp.uptodown.com/windows/versions

I plan to contact the ReShade developers to see if this issue can be resolved in a future ReShade update.
 
My problem is solved by installing ReShade version 6.5.

The stuttering issue was caused by something else.

A box had been unchecked in the FreeSync settings.

Phew, the problems are finally resolved.
 
pilAUTO said:
My problem is solved by installing ReShade version 6.5.

The stuttering issue was caused by something else.

A box had been unchecked in the FreeSync settings.

Phew, the problems are finally resolved.
Click to expand...
That's great!
Thanks to your info, I was able to figure out the cause too.
Feels really good.
Now if only ReShade fixes this issue in a future update, that would be even better.
 
And this is a bit off-topic, but I wanted to mention it as a joke, because I really suffered for 24 hours :

Once the ReShade vs. Fanatec problem was solved, I realized that the stuttering continued and that it was completely unrelated to that issue.

After countless frustrating tests over 24 hours, and I only slept 2 hours during that time (for other reasons, not just the testing), I came to the conclusion that it was extremely likely that a component of my computer was malfunctioning and that I would probably have to buy a new one...

Fortunately, at the end of the 24 hours, and after a huge number of tests of all kinds, including a complete reinstallation of Windows and many other things, I realized that a checkbox related to FreeSync on Nvidia app had unchecked itself... without me even touching it...

This is the first time I've spent so much time finding a solution on my computer, a real nightmare.

But what a relief when I realized that rechecking that box completely fixed the problem !

So I'm going to use ReShade again to have a much more realistic image (perceptible level of detail, color saturation, contrast...).

Have a good day anyway!
 
pilAUTO said:
And this is a bit off-topic, but I wanted to mention it as a joke, because I really suffered for 24 hours :

Once the ReShade vs. Fanatec problem was solved, I realized that the stuttering continued and that it was completely unrelated to that issue.

After countless frustrating tests over 24 hours, and I only slept 2 hours during that time (for other reasons, not just the testing), I came to the conclusion that it was extremely likely that a component of my computer was malfunctioning and that I would probably have to buy a new one...

Fortunately, at the end of the 24 hours, and after a huge number of tests of all kinds, including a complete reinstallation of Windows and many other things, I realized that a checkbox related to FreeSync on Nvidia app had unchecked itself... without me even touching it...

This is the first time I've spent so much time finding a solution on my computer, a real nightmare.

But what a relief when I realized that rechecking that box completely fixed the problem !

So I'm going to use ReShade again to have a much more realistic image (perceptible level of detail, color saturation, contrast...).

Have a good day anyway!
Click to expand...
Why was FreeSync turned off...
But I'm impressed by your persistence!
Have a great Sim life!
 
I think the checkbox was automatically unchecked without my consent when I tried to use DSR and then NVIDIA's DL DSR.

I'm not sure, but that's what I suspect.

Now, not only do I have a very smooth image, but I'm also using ReShade and my Fanatec steering wheel without any problems.
 
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