Constant Stutter after bombing explosion

[schuey97]

Have been running DCS (stable version) with no issues except for the following scenario:

 

I have created a training mission for myself flying the FA18 on the Persian Gulf map that involves flying off of a carrier, taking on some Migs with a wingman, bombing a SAM site, refueling and landing back on the carrier.

 

The SAM site also includes a supply depot that has been setup with ammo crates, fuel supplies, etc. Taking out the SAM site is fine, however while firing a maverick into a group of ammo and fuel supplies the explosion causes a stutter that is un-playable. Basically have to quite the mission and start again. If I don't take out the supplies I get back to the carrier with no issues.

 

As I have no issues with running the game, just wanting to check if there are any problems with large scale explosions or multiple items being taken out in an explosion.

 

I'm currntly running on High graphic settings at 3840x2160. However if there is a setting that may cause issues with explosions, I will have a look at changing those settings.

 

PC Details

Intel i7 6700K @ 4Ghz

32GB RAM

Windows 10 1909

Nvidia GTX1080 Ti

Game Installed onto an SSD

 

Thanks

[Flappie]

Hi, can you please redo the mission until you get the stutters, then quit the game, save the track, and attach here both the resulting DCS.log and track file?

 

You'll find the log file in C:\Users\your_name\DCS\Logs.

Edited August 26, 2020 by Flappie

[schuey97]

Hi Flappie

 

I have re-run the mission and attached the track and DCS log file.

 

Was able to attack the SAM site, then fired a maverick at the ammo/fuel supplies with no stutter. However I made a turn and came down lower firing another maverick at the ammo/fuel supplies and got the stutter. Allowed the game to run for a couple of minutes, however the stutter did not clear.

 

Thanks

stutter.trk

dcs.log

[Flappie]

Thank you. For some reason, the track didn't make it to the ground attack. I saw you (was it you?) duel with a few Su-27 then your aircraft hit the ground. :noexpression: Replays are still bugged.

 

In your log file, I see you have a very small pagefile of 4 GB, when you have 32 GB of RAM. If you have set up such a small size for your pagefile, I suggest you let Windows handle it instead.

Here's how to do it:

 

Windows Settings > System > Advanced system settings > Performance settings > Advanced > Modify... > Tick "Automatically manage paging file size for all drives" and apply.

[schuey97]

Hi Flappie

 

I had recently re-installed my OS and completely forgot about my page-file. I have increased this to 32GB.

 

However, I tried running the same mission again and after firing the maverick into the supply the same stutter returned. I did capture the track but the same thing happened again with a duel happening with an Su-27 and crashing into the ground.

 

I don't know if it helps, but have uploaded another log file after this mission.

 

Thanks

dcs.log

[schuey97]

Ok, hopefully captured it this time. :joystick:

 

Disabled the Su-27s and started me closer to the SAM site. Took out the SAM, then fired a maverick, swept around and fired another maverick and the stutter begins when the target is destroyed.

 

Both log and track file has been attached.

 

Thanks

dcs.log

stutter3.trk

[BIGNEWY]

Please try to disable hot plug devices and see if it helps

 

https://forums.eagle.ru/showthread.php?t=251377

 

thank you

[Flappie]

I was able to reproduce the bug on both stable (2.5.6.52437) and OB (2.5.6.54046). 100% reproducible.

 

I had to edit the mission as I don't own the Hornet. I did a run with the Viggen. My FPS turned from ~125 to ~13 as soon as the objective blew up. Here's what it looks like:

 

 

There's something weirder: I had a strange feeling that time had somewhat stopped. When I tried to eject over the burnt area to get a better view, ejection did not worked (2:15). However, I was able to shoot more rockets (I flew with unlimited ammo).

 

It is clear those stutters are produced by the explosion of one (or several?) of the objects on the ground.

 

Here's a track recorded on the latest OB and the corresponding log.

stutters.trk

dcs.log

Edited August 28, 2020 by Flappie

[Seal550]

Exact same problem here !

added the autoexec.cfg but no change at all

Edited August 29, 2020 by Seal550

[schuey97]

Thanks Flappie & Seal550 that this is happening on other machines as well. I'm happy to know its not my machine causing the problem. That's defiantly strange the ejection didn't work and other features still worked.

 

I will give the "disable hot plug devices" as Bignewy mentioned, however I'm assuming this will most likely not help as it's reproducible on other machines.

 

As its happening on stable and open beta, I guess for the time being I may have to modify the bombing zone and remove some targets. Thanks for your help

[Flappie]

You're welcome. Please let us know what obect is causing this. I did a quick test with only the M117 bombs, but it's not them.

 

By the way, I've just tested the Viggen ejection system on OB in a standard mission: it works.

Edited August 29, 2020 by Flappie

[Seal550]

The problem does not seem to be related to the weaponry because I tested all types of bombs.

The common point seems to be the presence of FARP tent near the explosions, and / or the concentration of units at the same point

Edited August 29, 2020 by Seal550

[Seal550]

Here an exemple :

 

Edited August 29, 2020 by Seal550

[BIGNEWY]

Here an exemple :

 

 

Thanks for the video, I believe this is related to a fps drop we already have reported, next patch should help

 

thank you