I hope somebody can help me find the source of a regular stuttering in XP12.  I have dialled in XP12 to my preferences and am loving what I see, but this stuttering is driving me a little crazy.  I have my FPS capped at 45 using RivaTuner, and use Lossless scaling X2 to get a very smooth 90 - as smooth as I always get in MSFS 2024.  Approx. every minute I get a severe stutter that lasts about 25 seconds. The RivaTuner Graph shows this badly affecting Frame Times.  After 25 seconds the display returns to butter smooth. This repeats constantly.

If I check Plugin Admin I see no 'cost' against any plugin. If I go into the performance tab, I just see a solid circle for X-Plane - nothing that matches up to this stutter.  If I monitor processes in task manager, I don't see anything in the process list that matches up to the stutter.  In Microsoft Defender, I have excluded the folders for X-Plane and the folders used by the Map Enhancement tool.

I have also run with no plugins at all, but still see the stutter!  Can anybody help with this?

It's known issue for 12.1 and it's weather update related, fixed in 12.2 but 12.2 is currently still in beta with other issues pending.

1 hour ago, C2615 said:

It's known issue for 12.1 and it's weather update related, fixed in 12.2 but 12.2 is currently still in beta with other issues pending.

I thought it may be weather download related, but I still get the same stutter when manually setting the weather.  

Part of the issue is the way cpus use there cores, threads. Occasionally when the cpu needs to ramp up other cores threads, the main thread may temporarily drop speed causing stutters. Pretty sure that was mentioned.

There is one type of stutter happening exactly every 60 seconds - but it lasts only for about half of a second. It is associated with having "clouds" - independent of using manual or real-weather clouds. This is fixed in 12.2 (currently in beta).

All other stutters - especially one "lasting 25 seconds" like @MrBitstFlyer reports - are probably due to add-on scenery, especially non-repeating scenery like autoortho or the likes, not any plug-ins.

Note that many (most) users are running auto-ortho without these stutters, so they might hint at some bandwidth problem (download/memory access), although the hardware shown in MrBitsFlyer´s signature looks very capable.

Edited May 29, 20251 yr by Litjan

Do you have the stutters when you disable MET?

It’s not easy to find out. I remember having had these kind of heavy and longer lasting fps-drops when Autoortho was loading the new tiles. But I somehow managed to make them disapear now (don’t ask me how…). We have to try different settings (Nvidia options etc.). Another thing is also to exclude ever programm running from the Firewall/Antivirus-checks etc. etc. etc. 😀

3 hours ago, jcomm said:

Do you have the stutters when you disable MET?

Yes, I have loaded XP12 without MET and the same stutter is there.

2 hours ago, Franz007 said:

Another thing is also to exclude ever programm running from the Firewall/Antivirus-checks etc. etc. etc. 😀

I have disabled everything in the background plus have excluded the XP12 folder, MET Base packages & cache folder from Windows defender.

Try installing the demo version in another folder and (without any plugins, addons, or modifications) see if you still have the stutters. Then add mods one by one in the demo and see which one causes the stutters.

Edited May 29, 20251 yr by Murmur

1 hour ago, MrBitstFlyer said:

I have disabled everything in the background plus have excluded the XP12 folder, MET Base packages & cache folder from Windows defender.

I recall reading a thread somewhere -- but for the life of me I can't find it now -- where a user reported that he eliminated his repeating stutters by actually disabling Windows Defender. They stated that they, too, had excluded all of the appropriate folders from Defender's scan list but it was only when they fully disabled Defender that the stutters cleared up. Might be worth a try.

But remember to re-enable Defender when you're done.

1 hour ago, Malaromane said:

I recall reading a thread somewhere -- but for the life of me I can't find it now -- where a user reported that he eliminated his repeating stutters by actually disabling Windows Defender. They stated that they, too, had excluded all of the appropriate folders from Defender's scan list but it was only when they fully disabled Defender that the stutters cleared up. Might be worth a try.

But remember to re-enable Defender when you're done.

De-Activated Windows Defender - same regular stuttering!

This video shows the extent of the stuttering in the Rivatuner graph top left.  Smooth then 25 seconds or so of big stuttering.

 

🤔

2 hours ago, MrBitstFlyer said:

big stuttering

Now's your chance to be a XP community hero and record a ETW trace when it's glitching to send to LR in a bug report.