SU9 mostly great, except for A320FBW which has dire performance now

Discussion Hub Aircraft
1

I fly only three planes on a very regular basis. C172, TBM930 and A320FBW.

The first two are working pretty much very well since SU9, but my A320FBW has taken an overnight plunge in performance from a solid 30FPS in SU8 to 2-9FPS in SU9, mostly around 5-6FPS.

I have tried Stable, Development and Experimental latest versions.

I have tried with an empty Community folder (except for FWB obviously).

I have tried with no city Photogrammetry.

I have tried with General Settings all on LOW.

I have AI aircraft disabled.

I have multiplayer disabled.

I have tried with Live and static weather.

I have tried switching the cockpit FlyPad On/Off.

Nothing helps at all. Same old ~6FPS and basically completely unflyable. Pre SU9 it has never been a problem and my rig happily ran the FBW at 30FPS VSYNC.

My system is lightly loaded while at 6FPS - usually around 53% CPU and 23% GPU. I am not main core limited as you can see below - work is nicely distributed across all CPU cores.

Yet you can see in the Sim Developer Mode On Screen Display below that it says the MainThread is getting totally hammered.

I have no latency problems on the PC. In fact, when not running the sim, the PC runs a complex music studio setup which is timing critical and works perfectly.

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The PC CPU and GPU are configured to prefer performance mode.

Nothing else changed on my system since SU8. No driver updates or other installs or general computer config changes. The only difference is SU9.

Anyone else? I’ve read some reports of other users having a 30% FPS drop. But I have 80% FPS drop.

So until I find a fix for this I am left only flying the GA planes.

Any ideas gratefully appreciated, cos this is driving me nuts.

A320FBW Very poor FPS on SU9
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2

Are you set in the sim for DX11 or DX12? DX12 has caused weird behavior before.

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3

DX11 here all the time.

4

I did not notice any significant degradation with the experimental version of the FBW A320 following SU9. All went well on a flight from KSNA to KLAS with a highly edited version of the SID and the database version of the STAR for an ILS approach to 26L using Simbrief and Navidata. Asside from the need to add missing waypoints in the SID all went smoothly. It was my best flight in this aircraft. I did update the FBW experimental version using the installer prior to my first flight after SU9.

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5

I’m not having any problems with it now. A few weirdnesses at beginning of SU9 BETA but fine now. Maybe a clean install:

https://docs.flybywiresim.com/fbw-a32nx/installation/

6

Hmm. Already done the clean install…

Running out of ideas.

THIS is the problem with this sim. Last week I had a hobby flying sim A320’s around the world.

This week, and for who knows how long, I don’t.

And all I can do is post messages here or Zendesk reports and hope someone reads them who knows the answer. But why would they. Everyone else seems to be working ok…

I’ve followed extensive knowledge and suggestions here, all to no avail.

Sigh…

7

What happens if you turn off Vsync?

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8

Sim Updates sometimes mess with settings. Might try setting your graphics presets to LOW and then back to what you normally use. Did you manually edit the .CFG to change LOD?

Been flying the FBW during the BETA and really did not have problems. Which livery are you using?

9

As I mentioned above, I have tried all GFX settings on low. Made virtually no difference.

Standard livery while I test.

It’s very weird.

10

Yes I tried that too. Made no difference.

11

There is something wrong with SU9. The Devs acknowledged it and are currently investigating.

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Thanks for that. I’ve filed a report in that thread.

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13

One other random thought. I see you have two GPU’s active, your internal GPU and your external GPU. I’ve never played like that, so maybe some conflict now on SU9? Maybe disable your iGPU and just run on your 1080Ti as an experiment.

14

I’m waiting another month for these fixes. Can’t fly this in vr now due to the issue with toolbars again. Its a joke this wasn’t looked at, I mean.. HOW DID THEY MISS THAT!!@???

15

Just to report back on my 6fps in SU9 A320neo FBW.

It is the FBW mod or a combination of that and SU9 which is causing my massive FPS drop from Vsync 30FPS to 6FPS.

I just uninstalled the mod and flew the standard Asobo A320neo and got a sold 30FPS, smooth as butter.

Restinalled the FBW mod - back to 6FPS.

This is with the lastest Experimental version, although I testest Stable and Dev the other day and had the exact same problem.

Later…

I’ve just now retested this with the latest nVidia driver v512.59 (was on 512.15 with the same problems previously), and with ALL SIM GENERAL GRAPHICS SETTINGS ON THEIR LOWEST SETTING INCLUDING OFF WHERE POSSIBLE…

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And here is the result with A320 FBW, and only with FBW. All other planes have my usual frame rate of VSYNC 30 FPS even with my normal settings which include Ultra nd HIGH etc.

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And note the complete under-utilisation of both the CPU and GPU, even though the CPU load is nicely balanced across all cores.

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Lastly, look a the GPU clocking. During the loading of the flight, the GPU was correctly clocking at around 2050Mhz, but as soon as the sim enters the actual flight mode, the clock drops back to 1569Mhz, and there it stays.

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Prior to SU9 and with other planes, the GPU always clocks at 2000+Mhz, but since SU9 and when using FBW, the graphics card sits around mostly idling at 12% utilisation.

Something is surely wrong with the sim in SU9 when combined with the FBW A320 resulting in the hardware not being used properly. This doesn’t happen with the Asobo A320neo - that works fine.

So please keep all the above in mind before you reply to this post. I really don’t need more posts telling me to reduce my settings or get a new PC or GFX card. :slight_smile:

MY SIM WORKS FINE WITH SU9 AND OTHER PLANES.

Really hope this gets fixed soon cos it’s not possible to fly the FBW here currently.

16

Look at me, Xbox Serie X user, since Sim Update 9, 1.25.7.0 version, the game is a continuous crash to Desktop and on A320neo (but I fear every aircraft) VFR map freezes while planning flight from Catania to London. In the eastern shores of South England, there are several waypoints who freeze the map as I add one of them as last one before the approach and landing pattern.

Why don’t you write on Google these many upon many issues. This festival of crashes to Desktop?

Sim update 9 has literally destroyed the game turning it in an unplayable and so an unenjoyable product.

1 Like
17

Just try going into DEV mode. I did, and now I get no more studders; it’s smooth.

19

I tried to find the Dev mode on Xbox Serie X version of the game, but simply there in not iany where in any options from Options General to Assistant Options… I cannot find it, cenbyou suggest me where and how to find the Dev mode or Dev tab? Thanks

20

I have Xbox Serie X version of the game and with the Xbox Serie X these setting are impossible to manage, because simply, there aren’t. Cannot find them in any game settings

21

My post is totally irrelevant to the XBOX. It’s all for PC. For starters, the A32NX is not available on XBOX…