It’s very easy to judge where this problem form
No, it's not. You are confusing the cause with the effect. Since this is clearly video-drivers related, you THINK the problem has gone away by removing our software, just because no other addon is made to EXPOSE IT.
As explained in other threads, since a while ago (not since the last update, but since at least 3-4 months), we use some new functions in the P3D4 SDK, to get more direct access to screen updates, without using Simconnect, so we would be less affected by other addons spamming Simconnect with too many commands (distrupting our animations) AND we would spam Simconnect ourselves much less too, reducing the chance we'd do to the other addons what their might do to us. Ideally, all 3rd party addons should try to use such feature in the future, because it's way more efficient than Simconnect. This is called the PDK, and it's exclusive to P3D3+, but we only use it with V4.
HOWEVER, being more related to video drivers, it's possible this new API might be affected more by PROBLEMS, or more likely wrong "miracle" tweaks, either in the sim or in the video drivers you have applied, which might affect how this API works.
So, you DO have a problem, but you don't have an addon able to EXPOSE IT, unless you keep GSX installed. But of course, sooner or later, other developers will use the PDK, with more and more P3D4-only products coming out so, you'll have this problem even with no GSX installed, so you will be back to finding the REAL cause, which wasn't GSX of course.
Some other things to check for:
- Video driver tweaks. Try to remove ALL of them. Reinstall the drivers using the option to do a "Clean" reinstall
- Affinity mask tweaks. Remove all of them and just use the default, and see if there's any difference.
- Check/Uncheck the "Cap Simconnect updates" option in the Addon Manager menu, and see if there's any difference.
For those affected users, we might try making a special version of the Addon Manager that could be tweaked to NOT use the new PDK API, and revert back to Simconnect, likely with an .INI settings. However, it would be just a temporary hack to at least *confirm* the problem is in fact related to the usage of the PDK but, you will still have to fix it at your end because, we'll use the PDK more and more in the future and, I expect many more products will come out using it.