

Works great as long as you use the Xbox app on your phone to invite others.

After a little bit of workaround with the microsoft login and the working of the xbox controller. Then everything runs just like on windows.
gamescope -W 3440 -H 1440 -w 3440 -h 1440 -f --hdr-enabled -- %command%
Switch to Proton 9.0.4 to get Xbox controller working.
Must use the Proton Hotfix version on the first start atleast to get the microsoft login screen.
With default steam settings you dont get the microsoft login screen so you stuck in the menu.

No matter what, Doesn't Pass Sign-In.
--force-windows-fullscreen
Game opens and gets to the initial menu but hangs on "sign-in needed". Changing Proton to Experimental, deleting compat/shadercache folders and launch options all didn't fix it either.

Gotta delete the FH5 CompatData if login screen doesn't appear. Uses way less VRAM than on Windows and Runs Great!
Trying to log in MS account is a bit tricky.

Everything is work fine. If you get poor performance and weak stability on game, update your graphic driver first.
After updated 575 version graphic driver and switched to Proton Experiment, the gaming is able to run smoothly and Proton gets better performance. However, Nvidia Optimus functionality does not work for my laptop on the latest version of 575 and 570 drivers.

Playing on the lowest setting to reduce the probability of crashs, lose a lot of the fun of sightseeing in Mexico.
When any Anti-aliasing/DLSS, Reflection Quality or Shadow Quality is not VERY LOW (The Lowest Settings), highly possible crashes will occur.

fps set to 45
switched to desktop mode with experimental to get through xbox login

ffbwrap --throttling --throttling-time 12 /dev/input/by-id/usb-Logitech_G923_Racing_Wheel_for_Xbox_One_and_PC_0000efc8dd8c650a-event-joystick -- %command%
There is a known issue where the game is black until it is refocused when started - that is fixed in Proton 10.0-2 (beta) or Proton Experimental.
The game was sending too many force feedback (FFB) commands too quickly to my steering wheel (Logitech G923 Xbox/PC version), causing the FFB on the wheel to lag behind what was occurring in-game. I had to build ffbtools and use ffbwrap to limit the amount of FFB commands being sent to the wheel - see the launch options.
Additionally, the game would not read my wheel inputs until I reconnected it while the game was running. To fix this, I disabled Steam Input, which fixed this issue.
There is a known issue where the game is black until it is refocused - that is fixed in Proton 10.0-2 (beta) or Proton Experimental.

A bit hard on hardware.
45 fps 720p Lowest Settings Max
I had to make an other partition on my drive for it to start, because the path was too long.
gamemoderun %command%

Just installed it via Steam, changed to Proton 9.0-4 and worked like a charm. No issues, just some rendering textures in the distance.
Somes flickering or missing textures in the distance

MANGOHUD=1 %command%
The performance difference from windows is abysmal. Windows maxed out graphics i could get 100+ fps constantly. In Linux i get around 59 - 99 and also doesn't feel as smooth as it does on windows. Note that for some reason my gpu usage never got past 70% no idea why.
Multiplayer if you want to play with friends probably doesn't work since you can't open the window to invite your friends. I'm not sure how it looks when they invite you so you might be able to do that instead.

Proton 9.04, GE 9.22
Sometimes framedrops
Randomly lags and i have to restart just to play again

minor flickering for first 5 seconds of bootup
Couldn't get xbox sign in window to pop up. I disabled my window tiling, disabled mangohud, switched to expiermental, deleted prefix, then I was able to sign in.

flickering on bootup that stops after 5 seconds
I disabled my tiling, changed to experimental, disabled mangohud, and deleted the prefix and then I could sign in to xbox.

Cannot log into the game.
Either the popup to log in doesn't appear, or it does, but logging in has no effect and the game still asks to do so.

Crashes while initially loading
You can go as far as generating all the shaders in the loading screen, but after a certain point the entire program freezes.
After that's fixed, there is issues with fullscreening anyway.

Game crashes every hour due to memory leak

The game defaulted to 720p on my Steam Deck but overall it's completely fine viewing
A few dropped frames
Sometimes when you drive very fast you'll see some landscape tearing in the far distance but it's rare
Worked fine, only once did I run into an issue where the game defaulted to running at 21FPS...but after disabling v-sync that corrected that

Works awesome!!!
Runs perfectly

You'll have to tinker for the login screen to show up, and joining/inviting people is a no-no. playing by yourself is FINE.
gamemoderun %command%
Had to delete prefix and shader cache BEFORE switching to experimental and launching the game, in order for the login window to appear
KDE panel still present when alt-tabbing into the game.
This game is still not there for a Gold rating. Consider the 0 ways of inviting people, because that seems to be done using the xbox app, garbage setup with a login screen that won't show up until you change to cutting edge Proton, and the buggy nature of fullscreening as the prime suspects.
Good news is that, you can still play with your friends if you login here: https://www.xbox.com and send them a friend request. This works if your friend has Windows and the Xbox app - they'll be joining your convoy basically.
AFAIK there is nothing better you can do, because Microsoft likes to circlejerk over their software instead of making easier, in-game solutions to multiplayer functions like EVERYONE else does.

DXVK_HDR=1 %command%
use Proton 9.0-4
Worked out of the box

DXVK_HDR=1 %command%
This works PERFECTLY, even thouh it's developed by Microsoft ;)

When trying to do a convoy (play online), the a xbox app pop-up should appear. That's not the case here (at least in game mode, I have not tried installing the xbox app and then playing on desktop mode).
The game works perfect, the multiplayer does not work as well though, as a pop-up that is needed to play with friends does not appear in game mode (you'll see when you try to do it).

Needed to install WebView
I changed the game's quality and KDE crashed
Need Webview to login with Microsoft
If you can't login, install WebView

DXVK_HDR=1 %command%
I don't understand why its marked as silver, game runs without any issues.

mangohud %command%
For 20 seconds on the mountain zone, changed to medium preset and started to look alright (Before i was in Extreme preset)
When launching with Proton-9 Could not change to window mode in the settings menu, i needed to do alt+enter
Could not open xbox for inviting/joining friends
Apart from the error explained before, Online with other people worked flawlessly
Just to add. For logging in you need to run proton-9 and press alt+enter to make it in windowded mode. After that it will pop up the xbox loggin screen, log in and then you can change to your prefered proton
In the start menu, the press enter to continue button or what it is called only works after switching to another window with ALT+TAB and back multiple times

Runs well out of the box. Only needs to log in to Microsoft account in prompt using UI Keyboard. Frame drops when driving above 270kph
Limit screen to 60hz
On first launch, will prompt to log in to Microsoft account. Just open the keyboard (Steam + X) and log in to your account.
Frame drops or minor stutters will happen when driving constantly above 280kph (too quick for the deck)
Able to hit smooth 60fps in Low settings. Medium Settings is possible but not stable 60fps, would often drop to around 45-50fps. Maybe possible when plugged in (only tried on battery)

le jeu fonctionne parfaitement, galere pour ce connecté au compte
Probleme au debut pour l'enregistrement du compte la fenetre ne voulais pas apparaitre, en jouent avec le choix des proton a un moment ca a fonctionné

Proton Experimental is required to get past the start screen. No other proton version that I tried would show the account login popup. After switching to Experimental, there were no further issues.

had to enable proton experimental to get the login window to work. Downloaded the xbox app on my phone and can invite through that.

gamescope -f -w 3840 -h 2160 --hdr-enabled -- %command%
The latest update broke Microsoft authorization. To get the authorization window, you need to delete the folder /steamapps/shadercache/1551360 and switch to Proton 9.0-4. You can also add the startup command if the authorization window still does not appear: --force-windows-fullscreen

After getting "You May Not Proceed Without Being Signed In To A Profile" I switched from Proton Experimental to GE-Proton9-16 and deleted following folders: /steamapps/compatdata/1551360 and /steamapps/shadercache/1551360

FH5 works nicely on my Steam/Debian + Proton 9.0-4 + Logitech F310 Joystick. There are occationally hangs. The game loads extremely slow, though, a problem general to FH5.

I was unable to start playing, because of the "Sign in needed" pop up.
There is a bug which is a pop up with the title "Sign in needed". On Windows you can solve that easily using credential manager, but I was unable to fix it.