Assetto Corsa

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Sassanid Jun 11, 2022 @ 2:41am
Logitech G29 idle rumble?
Any other G29 users have this weird issue where the wheel rumbles and even slightly rotates by itself when the car is idle in AC?

I'm trying different settings, tried LUT files using wheelcheck and LUTgenerator, FFB PP on and off, nothing seems to work and stop the rumbling.

When driving a car, the rumbling goes away and the wheel behaves normal. But when slowing down to a halt, the rumbling starts to pick up slowly and is most noticeable when car is fully stationary and idle
Originally posted by onearmedbandit:
I used to use LUT's, until I had it pointed out to me by a few devs that they are virtually useless with the g series wheels (in terms of realism).

Here's my settings, I've marked the ones that may play a part.
https://imgur.com/a/RC0vnL1
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Showing 1-15 of 29 comments
ling.speed Jun 11, 2022 @ 6:32am 
Yeah have it on G27 but not to a point so it rotates by itself, It might be the disabled Damping effect (it was kind of added to fight that) cant test it atm.
For kunos part of FFB damper is only for the slow speed stuff, not sure if CSP uses damper for anything special.

Lower minimum force or different first (or first few) lines in the LUT file might fix that too.
Sassanid Jun 12, 2022 @ 6:21pm 
Originally posted by ling.speed:
Yeah have it on G27 but not to a point so it rotates by itself, It might be the disabled Damping effect (it was kind of added to fight that) cant test it atm.
For kunos part of FFB damper is only for the slow speed stuff, not sure if CSP uses damper for anything special.

Lower minimum force or different first (or first few) lines in the LUT file might fix that too.

I think I've tried all manner of different damper settings, low, mid, high, off, LUT files, but the rumbling still persists if I turn up the FFB to a range that feels good. If the FFB is at 100 then there's no rumbling, but it feels so light on the G29 so I increase it to around 300-400 and then there's more pronounced rumbling.

The strange thing I just noticed today is that the idle rumbling only happens online. Just tested the 2017 RSR offline for example, feels great, no rumbling, FFB set to around 400 in game, kerb/slip/road/ABS all set to 10. Feels great offline. But as soon as I jump on a server with the same car, there's quite violent idle rumbling with those same settings.
onearmedbandit Jun 12, 2022 @ 7:14pm 
No issues with my G29, both online and offline mode. If you want to know any particular settings I have just ask. Running LGS 9.02.65. Ran it up to 400% as well just to check.
Last edited by onearmedbandit; Jun 12, 2022 @ 7:16pm
Sassanid Jun 12, 2022 @ 7:24pm 
Originally posted by onearmedbandit:
No issues with my G29, both online and offline mode. If you want to know any particular settings I have just ask. Running LGS 9.02.65. Ran it up to 400% as well just to check.

Yes please, if it's not too much trouble can I see a screenshot of your CM control page, and I'll try your exact settings.

At first I thought maybe my wheel has some mechanical damage, but as soon as I noticed that it only happens online and not offline I breathed a sigh of relief and knew it was mostly like a settings issue.

So odd.
Sassanid Jun 12, 2022 @ 7:26pm 
I'm using these settings for now, since using a custom LUT file for some reason makes the rumbling a little worse...

https://i.imgur.com/WYuX5gu.jpg
The author of this thread has indicated that this post answers the original topic.
onearmedbandit Jun 12, 2022 @ 7:40pm 
I used to use LUT's, until I had it pointed out to me by a few devs that they are virtually useless with the g series wheels (in terms of realism).

Here's my settings, I've marked the ones that may play a part.
https://imgur.com/a/RC0vnL1
Sassanid Jun 12, 2022 @ 8:06pm 
Thanks bandit, you're the best.

I'll report back how it goes.
ling.speed Jun 13, 2022 @ 4:32am 
Running FFB to what level ? 400? jesus, or is it like a new logitech slider, on G27 107 was the max recommended, and in game gain is above 85 you start to clip anyways.

The setting on that picture, look fine. It's likely either in drivers and/or in LUT.
bandit is using Gamma, which is fine, but also makes the FFB quite non-linear.
If trying that gamma helps but you dont like wheel in corners, then the issue is likely on the lut generation software. Which can be fixed through manual editing of the LUT.
Sassanid Jun 13, 2022 @ 3:00pm 
Originally posted by onearmedbandit:
I used to use LUT's, until I had it pointed out to me by a few devs that they are virtually useless with the g series wheels (in terms of realism).

Here's my settings, I've marked the ones that may play a part.
https://imgur.com/a/RC0vnL1

THANK YOU SO MUCH!! I tried your settings and it's great now. No more idle rumbling online or offline and I can crank the FFB as high as I like, 400+ with zero wheel rumbling.

As if I didn't love you enough already bandit! Is there an award for best forum member ever? Because you deserve it my friend :steamhappy:
onearmedbandit Jun 13, 2022 @ 6:02pm 
Glad it sorted it Fret, and glad I could help.
ling.speed Jun 14, 2022 @ 1:21am 
I'm happy that it's fixed now Fret, but i dont like the fix. The issue is that moving from LUT to GAMMA changes whole lot about your wheel. While the rumble itself was just a tiny bt of the LUT being wrong at the start.

If you like the new FFB, then GREAT! But the very reason LUT was invented was to combat these kind of gamma practices that wheel makers were implementing on driver or wheel hardware level.

Now Gamma means raising the original cars steering value to it's power.
For 50% Gamma it means that if car sends wheel force at 25% the result is DOUBLED to 50% which generates unrealistically high forces for small bumps, while flattening any details in strong bumps. Near the max strength any change in FFB is HALVED making it much harder to notice any details in the road or weight transfers.

The likely issue of rumble was that first lines of LUT were set too high due to limitations of how the LUT is created in the first place. So if you ever want to have both the rumble fixed AND your original FFB, it's just a matter of changing few numbers in text editor (i could help if you ever fancy that road).

IMHO high ramp FFB (like with 50% gamma) is like rose tinted glasses, very fancy but you ultimately see less, and the world is not what it really is. But it is the wearers choice ofc.


I do agree thou Bandit is the GOAT. :) cheers!
Last edited by ling.speed; Jun 14, 2022 @ 1:23am
onearmedbandit Jun 14, 2022 @ 2:09am 
I'd listen to ling.speed, the man knows his stuff. And thanks for pointing that out too, I was supposed to have FFB postprocessing turned off, not on gamma. That is now corrected.

Interestingly I ran your settings Fret and couldn't replicate the issue you had. Do you have FFB tweaks enabled in CSP?

Oh ling is wrong about one thing, I definitely ain't the GOAT, just a guy who likes to see others enjoy this sim like I do. I'm still learning everyday.
ling.speed Jun 14, 2022 @ 2:56am 
Originally posted by onearmedbandit:
Interestingly I ran your settings Fret and couldn't replicate the issue you had. Do you have FFB tweaks enabled in CSP?
I actually have had the rumble too, just less. This tread finally made me fix it, and it was simply on LUT starting with non zero value, and quickly increasing in the first 10% of force range. Which induced oscillation (around +/- 0.02 shown on telemetry app) when iddle. Using gamma mode clears that out, but so is putting a deadzone or slower ramp into that first 10% of force range... this might be logitech specific issue, as i think belt wheel would dampen any such oscillations.

Now i hand crafted my lut from wide range of data ages ago (as far as being involved in implementing it in the game), but cant remember when the wheel started to do this rumble, maybe from the start, maybe some CSP tweaks changed how iddle physics or FFB worked at some point. For Fret it could also be an update from Logi.

Oh ling is wrong about one thing, I definitely ain't the GOAT, just a guy who likes to see others enjoy this sim like I do. I'm still learning everyday.
Im not wrong :) you have been heavy lifting this forums into sanity for too long.


ps: I think the issue here are logi wheels themselves. Logi engineers "fixed" the issue by lowering low level forces in firmware, but the LUT reverses that back to linear (or possibly even worse)
As for tweaks, im surprised to say the "low speed FFB reduction" setting in CM is NOT helping much - it does seem to do something, but not enough, at least for me. And it should be exactly the option for this issue... but it was created for DD wheels AFAIR where much lower levels of forces create resonant oscillations.
Last edited by ling.speed; Jun 14, 2022 @ 3:14am
Sassanid Jun 14, 2022 @ 9:16pm 
Alright so a couple twists and turns happened, but there's a happy ending!

So I tried bandit's settings the other night and was overjoyed to find the idle rumbling was finally gone and driving felt smooth but then the more I drove different cars I noticed that now the low speed rumble has increased a lot and while the wheel was completely still at idle, it began to turn in to the Tazmanian Devil as soon as I began to drive off at low speeds. So I basically had the reverse problem now whereas before I had massive idle rumble but it went away as soon as I drove off, now it was the other way around. Still at idle, and heavy rumbling when driving off. Long story short, I thought let me try to go back to using my LUT file for the G29, but apply bandit's settings and see what happens and to my surprise it felt the best my G29 has felt in a long time. No more idle rumbling and low speed rumbling feels much more realistic now.

After a few tweaks here and there in CM control settings, I ended up (by just random chance, trial and error) of finding the best wheel settings I've experienced since playing AC with the G29. I can now crank the in-game FFB all the way to 400-600 which is how tough I prefer the resistance especially on GT3 cars, and yet the wheel is completely smooth with no rumbling craziness upon slowing down to a stop, no rumbling at idle, and only mild rumbling when driving off which I'm guessing represents reality in some cars. It's now a night and day difference.

I have a feeling another big factor that played a part was me finally upgrading from CSP 1.74 to 1.78 yesterday. I noticed bandit mentioned 1.78 is good now so I gave it a try and was happy to see the evil levitating wipers that haunted my dreams were no more, and I could drive the 458 GT2 and E30 Drift in peace. Double good news! But honestly more importantly than the wipers, there is a very noticeable physical difference in the FFB when going from 1.74 to 1.78 and back. In 1.74 the wheel rumbles and feels more jerky and it instantly felt smoother when going to 1.78. I do have a few of the "FFB Tweaks" activated in CSP settings in CM so maybe those are doing their magic too in some way.

No more levitating wipers and I somehow managed to stumble upon the perfect G29 settings. Thanks again gentlemen. Grateful for the wisdom and help as always!

https://i.imgur.com/REFYEXy.jpg
Last edited by Sassanid; Jun 15, 2022 @ 6:19pm
ling.speed Jun 15, 2022 @ 6:40am 
Haha, glad you have it sorted :)

Tbh i think the main culprit is this:
" I can now crank the in-game FFB all the way to 400-600 which is how tough I prefer the resistance especially on GT3 cars"

The game was never designed for that levels of force lol. Thats 3 to 4.5 times what everyone else is running. And without the power of DirectDrive to actually give you that torque, the poor G29 will gonna make ffb VERY weird. Also clipping to oblivion and back, but thats i guess for another thread.
Last edited by ling.speed; Jun 15, 2022 @ 6:41am
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Date Posted: Jun 11, 2022 @ 2:41am
Posts: 29