Compatibility Report

don't close the issue yet, the game use CrackProof anticheat that may work or not working with Proton.

don't close the issue yet, the game use CrackProof anticheat that may work or not working with Proton.

As far as i've seen and played there is no issue with the anticheat

I got past the white screen by switching to GE-Proton10-3

Correct, the game is running using GE-Proton10-3.

System Information

• OS: Arch Linux
• KERNEL: 6.14.2-arch1-1-surface
• CPU: 12th Gen Intel Core i7-1255U
• GPU: Intel Mesa Intel Iris Xe (ADL GT2)
• GPU DRIVER: 4.6 Mesa 25.1.4-arch1.1
• RAM: 32 GB
• Launch options: NONE

Steps to follow

• Activate compatibility on Steam settings
• Installed the game and required data
• Installed ProtonUp-Qt and added GE-Proton10-3
• Changed Umamusume: Pretty Derby to use GE-Proton10-3
• Also change it from the Steam App Properties -> Compatibility tab
• Run the game using GE-Proton10-3, wait for the Vulkan Shaders to compile
• Start playing the game

Screenshots

Can also confirm it works with GE-Proton10-3

GE-Proton10-3 gets the game further than the logo. However, I'm getting error 390 after selecting a region and entering my birth year and month, using the correct format. I've read online that VPNs or networking configs can cause this error so I tried with my Tailscale disabled which didn't seem to change anything.

sudo tailscale down

I also tried disabling the docker network but that also didn't fix the issue.

sudo systemctl stop docker
sudo systemctl restart iptables
sudo ip link delete docker0

I also updated my DNS to use 1.1.1.1 and 8.8.8.8 but that also did not resolve the issue.

Unsure what else to test, there don't seem to be many resources online about how to actually fix the issue!

I got it to work with ubuntu 4.10 linux kernel 6.12.36 and nvidia 570 (manually installed). I did a mistake while installing the driver not letting it to configure xorg AND changed from wayland to xorg to fix the black flickering bug (known bug)

edit:
used 9.0-4 version
AND installed https://repo.steampowered.com/steam/archive/stable/ (latest-stable.deb) THEN changed it after some shaders and automatically downloads didnt started to apt install steam one

basically I falled successfully I think

Replying to https://github.com/ValveSoftware/Proton/issues/8848#issuecomment-3009753429

This so helpfull, god bless u, i did run it on ubuntu 24.04.02 LTS x86_64
Intel i5-8400
Intel CoffeeLake-S GT2
Kernel 6.11.0-29-generic

Not sure why, but the game's stuck in windowed mode for me on KDE Plasma 6.3.5 and using Plasma's Window Rules settings to force it doesn't seem to work...
Using F11 forces fullscreen after the fact, but I'd prefer not to have to manually intervene for that every time. :/

This game has the same issue that other games seems to have where if the game dips in fps while borderless fullscreen everything else in another screen also dips. I'm using an RX 6750 xt with a Debian unstable RT kernel.

Works fine using GE‑proton‑10‑3, but other versions don’t; with arguments or without, it doesn’t really matter.

On Proton Experimental, I'm left with a white screen with no sound. The PROTON_LOG didn't give any clear indication if anything is wrong at all https://gist.github.com/braiam/9fe36bab781ef8e12e6636c4b53623e8