Linux mint Cinamon for GPL

[Syd Drake]

I lowered my desktop resolution from 1440p to 1080p, and now GPL is running in full screen. But when on track, my screen starts artifacting. This might have something to do with my system not seeing GPL properly and needing those corectrl and cpupower apps.
Because, I installed Assetto Corsa through steam (and special version of proton) and I'm running AC at 1080p with high details and averaging over 70fps, so I'm not missing raw power.

Edit:
This is what I mean by artifacting. And it happens on the desktop as well, after exiting GPL. Nothing like that happened when I used AC.

https://youtu.be/-7Y4pFD4VZ8

[Cookie]

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.

[Cookie]

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

[Syd Drake]

I think it was the drivers. After I installed the system, I installed official amd drivers (amdgpu-install). I don't think that was needed, so I uninstalled them, and now I don't have artifacting in GPL.
The only problem now is resolution. I prefer to  have my desktop at 1440p, but if I go into GPL like that, it runs in a upper left corner. And upon exiting my desktop is in very low res, and I have to restart the whole pc to get back to normal (gui becomes to big, and I can't use it to change resolution without a restart). So I have to remember to change desktop resolution everytime I want to start GPL.

Btw, I installed fanatec drivers, and CSL DD is running properly, and with FFB.

[Cookie]

Great it works!

Fanatec driver = hid-fanatecff-next?

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

[Syd Drake]

I have discovered why GPL won't run in full screen. It's Mint scaling. If it's at 100%, than GPL will run in full screen, no matter the desktop or GPL resolution.

At 1080p I didn't need scaling so I was setting it at 100%, at 1440p I usually set it to 125%.  I discovered it by accident, when I left desktop at 1080p and set GPL to 1440p in Gem+ and it ran in full screen.
For fanatec driver I used this:
https://github.com/gotzl/hid-fanatecff
I compiled it from source.
I did drive in Linux and WIndows in two consecutive sessions for comparison and I feel that in WIndows force feedback is stronger. (I didn't change any settings on the wheel, same builtin profile used for both).

[Cookie]

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

[Syd Drake]

I have the same 8nm version. I always keep ff strength on the wheel at 100. I tried 450 in gem+ but that made the wheel very light, so changed it back to 300, which is what I was using under windows.

[Cookie]

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

[Syd Drake]

Never heard of ffb2 patch What is it?

[Cookie]

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:

This patch is intended to improve the GPL force feedback in terms of minimizing latency and removing everything but the direct feedback of forces from the physics engine. Those who prefer the ffb to have damping, centering, and other forces not derived from the car physics will find this patch less useful.

For best results, use with the 60fps patch which already reduces ffb latency and improves ffb accuracy by updating the forces more frequently.

Removing all damping makes forces more harsh, but at the same time more accurate. Your wheel may react very violently, so under any circumstances don't ignore the advice given in this README. Trying the patch is completely your own choice, and the responsibility is yours as well. If it does not work for you, just use the original ffb.

[Syd Drake]

I tried ffb2. Seems more consistent between Linux and Windows. At 300 in GEM+, feels about the same strength in both, but weaker than Windows without it at 300. And I can't lower it more, I tried 250, and the wheel becomes very jumpy. When I say ffb2 is less strong at 300, I mean the strength needed to turn the wheel. At least in Windows, without ffb2, with stronger resistance in the wheel, the car feels heavier, and therefore easier to catch if something goes wrong.
I don't know, maybe I'm missing the point of ffb2.
Here's my wheel setting, taken from fanatec tuning menu under windows, but they're saved on the wheel, so it's the same values used for windows and linux.

[Cookie]

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

[Syd Drake]

I'm not comparing GPL to modern games.
I'm comparing GPL between windows and linux, with and without ffb2. For me, windows without ffb2 at 300 is noticeably stronger than with ffb2 at 300. At higher values than 300, ffb2 feels very light, car gets very difficult to catch when it starts to go into a spin, or when you try to countersteer on corner exit. FFB2 at 250, and the wheel gets pretty wild jumping from side to side to quickly. I don't think that FEI 90 makes that much of a difference, but if I get a chance I can try with it at 100 tomorrow.

[Cookie]

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..