FPS and stutters seem worse when MSFS is the active screen!

Bug Reporting Hub Install, Performance & Graphics
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1

I run duel monitors with MSFS on one and navigraph and obs on the other. Since the hotfix I have performance issues. But I noticed something interesting. If MSFS is the active window then the obs recording becomes stuttery and tells me i am recording at about 22fps. As soon as the MSFS screen is not active then the recording jumps back up to 30 and is smooth.

Anyone else found this?

2

I run a single monitor but two computers via a KVM. Use sim on one machine full screen and work stuff on the 2nd.

Used to be able to switch machines mid-flight and back again without issues.

After the last update, switching back to the sim machine has the sim locked up for a good 10 - 15 seconds, totally unresponsive, even if just on the Welcome menu.

Iā€™m guessing the last update introduced a new behaviour on the sim window when switching focus.

3

MSFS is not responsible that OBS works fine :wink:

There are some discussions about ā€˜what happens if focus changeā€™ within the forum , mostly in case e.g. ATC is windowed. And we have also discussions about OBS performance.

4

The performance of OBS is not really what I am getting at. I just used it as an example showing the effect. The point is having MSFS as the focus seems to increase the resource usage compared to when it isnā€™t. Something that wasnā€™t an apparent issue before the hotfix.

As well as OBS this is also illistrated by the fact that on a recent flight over Madagascar I had MSFS ss the focus. When i looked at the ground passing below it had frequent stutters. When i clicked on any other application then things suddenly became much smoother

5

ah yesā€¦ I also want mentioned to split it into OBS and the ā€œchange the focusā€ part. May be it comes not clear on top with my english :slight_smile:

6

I have the same and it is explainable.

Making the second screen active gives it first priority for the GPU (for example for playing youtube videoā€™s etc.) So what happens is the game becomes GPU limited, which gives the least stutters.

Then you make the main screen active again. The GPU prioritizes the main screen again so the system becomes limited by main thread, which causes stutters.

You can minimize this effect by disabling hardware acceleration in your browser. But then it will always stutter because the system is always limited by main thread. :slight_smile:

Just use your GPU more so it becomes the bottleneck, turn rendering scale up a little.

You want the GPU to be the bottleneck for a stutter free experience.

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