srlemke

My setup runs 7680x1440 at 120hz/fps on a Radeon 6900XT
I did try KDE/Plasma 6 with wayland and gamescope (a lot) but there is always something going on, like
super smooth on normal testing, then on online sittuations random frametime 'ticks' which I could not solve.
Also, smooth frames for 2 laps then staring to lose sync.
So KDE/X11 with X11 TearFree enabled it is.

### KDE Settings: ###

KDE Window Manager needed setting:
systemsettings -> Window Management -> Kwin Scripts -> Video Wall

srlemke

On OBS advanced recording settings, you should have listed Navi 21 VAAPI 
device (for 6900XT)
Rescaling should be off.
Don't forget to cut (with alt)!! the not recorded/streamed parts of the 
screen when cropping the capture size to 1080.

For decent local recording and not to big file sizes, a good setting is:
Rate Control: CQP with QP at 30 (dynamic, avoids cornering stutters.) 
0 impact on gaming.
(Decreasing this number increments quality but also file size)

srlemke

///You still need to add the icons to the dash images.

car = lcase($prop('CarModel'))  

if (car.includes('bmw')) {
     return 'BMW';
}

if (car.includes('mercedes')) {
     return 'mercedes';

srlemke

vim ~/.local/share/Steam/steamapps/compatdata/211500/pfx/drive_c/users/steamuser/Documents/My\ Games/SimBin/RaceRoom\ Racing\ Experience/UserData/graphics_options.xml 

In my case:
<fovScale type="float32">0.50999999</fovScale>

Some more detailed info:
https://forum.kw-studios.com/index.php?threads/is-there-a-way-to-change-chase-hood-and-bumper-camera-fov.21162/#post-260356

srlemke

Video Device: 6900XT - you also want to underwolt this one or possible other AMDs.
My case: 7680x1440@120hz on X11 (6900XT with Ryzen 9800X3D) (GPU offset -81 via LACT app)
Steam launch: mangohud gamemoderun %command%

You want a 9800X3D for LMU, it is a beast, I upgraded from a 5800X3D - It's like 50% better, LMU is Single-Core CPU bound 
most the time.

Before Starting the game, get the proper frametime for your resolution and desired FPS with cvt (7680x1440@120fps my case):
slemke@gamesmachine:~> cvt 7680 1400 120
# 7680x1400 119.92 Hz (CVT) hsync: 180.24 kHz; pclk: 1929.25 MHz

srlemke

The tutorial works, but in most of my test on simracing this leads to some kind of stutter.
In general its better to use the default resolutions for simracing at least in my monitor.
If your customm resolution is not for simracing then this totally works.

Needed to find current monitor, Install:
edid-decode

Find your monitor, thats annoying, I know mine is this, yours is probably somewhere in this path to:
edid-decode /sys/class/drm/card1-DP-1/edid

srlemke

Note, to be able to move widgets in wayland check: "Enable X11 Platform Plugin Override" on tinypedal 
compatibility settings and restart it.

-> Now to install && run:
zypper in python313-pyside6 python313-pyxdg python313-psutil

Clone it recursivelly:
git clone --recursive https://github.com/s-victor/TinyPedal.git

Linux uses a specific Shared Memory:

srlemke

This is not so much needed anymore, lact does a great job of applying this same settings!
Install lact, set ofset -81 and should be all done.
on lact, also set fan to curve instead auto.
mangohud and gamemode are still good stuff, so I suggest those to be installed.

## Original Manual way bellow: ###

#You need to unlock the card for over/under-clocking work, add this as grub boot kernel argument: (lact can do this)
amdgpu.ppfeaturemask=0xffffffff

srlemke

Update 02.Apr.2026:
I made a script that will do all the needed checks and install SimHub:
https://github.com/srlemke/SimHub_on_Linux

There is also a V2 in the works that also can install CrewChief:
https://github.com/srlemke/SimHub_on_Linux/tree/With-Crewchief

Automatically adds and configures plugins for LMU, it also detects custom Proton.
Automatically adds dash.exe when Raceroom.
Fixes common issues, like removal of dotnet4 Steam stub

srlemke

winetricks -q dotnetdesktop6

#Download AMSCM from:
https://www.overtake.gg/downloads/automobilista-2-content-manager.59727/
wine AMS2CM.msi (Do not forget to install CLI that you have to select in the AMS2CM installer)

#Double check the path on the bellow file, this is the most important:
vim /home/slemke/.wine/drive_c/Program\ Files/AMS2CM/Config.yaml
Path: Z:\home\slemke\.steam\steam\steamapps\common\Automobilista 2