I am experimenting atm with 360-380 and 30cm custom wheel - but too much hurts my wrists!

I had to make new all my old setups, after I had understood how this FFB works for us and gives a fine feedback. (no damping and latenzy...)

These old setups often remind me to those Aussie Speedboats on the water labyrinths...  with a complete indiffernt steering.

my settings for StJov

I did some testing too also with FFB3test

Yes of course there will be a different feeling in steering also depending of your wheelsize - I used a 30cm - but normally a 27cm F1 carbon

My W10 testing with minimal PC but stable 60fps..

You can not compare GPL FFB with modern games
For shure in AC or RF2 or AMS2 it is a more refined FFB, the GPL FFB was made in ~2004 and so it is much less detailed.
In brr's readme he talked about G25 wich was then state of the technic, but there have been allready virtual non physical effects he claims to switch off.

I use no damping or filtering or latency of any kind and set all real forces to 100% in wheel (you cut it: FEI 90 = 7,2nm) and PEAK ( =8.7nm!)

I limit the game forces only in GEM+ and so keep the headroom for spike effects and dont cut the top level.

I do test my FFB and basic setups on a long straight like Monza and try to simulate a stable handling Slalom

2009 Petteri Pajunen had made the 60fps patches and had made the FFB2 patch, get it at the fastlane
Most of the online driver use it ( there is also a test version of a FFB3 wich was never released...)

From the readme:

Of course, as you drive the 67s with the old tyre model you need higher FFB.
Are you using the FFB2 patch?

Test reducing the refresh rate of the monitor to 60fps as gpl will sync to it and linux mint has built-in vsync.

My best settings in my CSL DD wheel (8nm) are all the forces to 100% and all gimmicks to zero, the FFB set in GEM+ to 450 -550 depending wich mod.
This prevents you from clipping in long corners. read this thread: https://forum.fanatec.com/discussion/27925/setting-up-the-max-torque-suggestions-dont-seem-right
Yes, the linux USB system is a little different to MS - I do allways put the wheel in the main USB2 ports for mouse or KB

Great it works!

Fanatec driver = hid-fanatecff-next?

Is this your native monitor resolution?
Have you tried to set the HQ resolution here:

NP for GPL as it computes minimum a 1/10000 sec difference

ps
have you tested the different modes in GEM+ "graphic settings" like Z-buffer trilinear filtering... ?

Yes, the AMD linux driver is good for the more recent games like AC or AMS2, but it is missing a gui for the old GPL wich is not able to set the graphics ingame.
You cannot set AA or AF in game what makes for the NV the big difference.

I have given up my testing AMD graphics, as a tiny NV GPU makes it better than 10hours tweaking an AMD card (my own experience!)
for an AMD fanboy from the first Athlon CPU and ATI GPUs it is frustrating, as long they made a proprietary linux CCC driver I was happy.
There are solutions to set the GPU modes by commands - maybe a better linux coder can make a shell script one day...

Tbh it's the same with intel and NVidia open source drivers, no gui to tweak...

Yes this is a challenge to run a 26 year old software today especially for a new linux user.

Sorry for your troubles, but I have no idea why you all could not join  

I still suspect that GEM+ did not set your .exe to normal not AT mode...
Try again now I restarted the server for the next hour

Had you tried before the race to connect to the server in the afternoon?

Yes, the rear end jumps 1m in the air when you start to brake down from 200mph...

This CPU will idle running GPL, as wine (like w10) does not recognize it as a 3D app... so you have to set it in performance mode 

Mint uses the same Ubuntu/mint wine version as it is mentioned there so no risk. I had mentioned the 6.03 because the 7+8 had lost the FFB we need. 9 works for me!

Your AMD APU is so new that wine6 can not know it...

installing the recent wine-devel includes the uninstall, so no problem

I use 6 mint PCs for all purposes so I know it. But mint is very conservative with new hardware and drivers.

Manjaro is the rolling OS with the latest kernels and drivers, so I think it better supports your RAM and APU.
The desktop can be the same cinamon or XFCE - it is free so only time invested to test it...

The problem is the AMD iGPU wich does not support our openGL version.
It can be pushed by CoreCtrl to bring better fps with D3Dx https://gitlab.com/corectrl/corectrl
The cpu can be pushed in performance mode by cpupower-gui
For this recent AMD hardware you must use the last kernel 6.5 for mint

alternatives

Try the WineHQ.org recent wine-devel install via terminal (ubuntu)

Another OS is manjaro wich uses the newest kernel 6.8 but the standard AMD iGPU support is also minimal
ps
Fun fact - a passive NV GT1030 for my office pc runs GPL in all its glory...