When I try and launch the game I get nothing, just a blank black screen with no sound.

Ubisoft Connect seems to open fine.

The monitor seems to almost switch display mode / settings, as it flickers and comes back up with HDMI1 in the top left (as if it has just detected a new display input).

Things I've tried so far:
- Uninstalling and re-installing the game
- Re-installing / Repairing support applications in C:\Program Files (x86)\Steam\steamapps\common\Steep\Support\Software
- Updating Windows
- Updating Nvidia drivers
- Installing and running everything as administrator
- Deleting C:\Users\<username>\OneDrive\Documents\My Games\STEEP\Default
- Updating C:\Users\<username>\OneDrive\Documents\My Games\STEEP\Default/STEEP.ini WindowMode=2 to WindowMode=1

Worth noting it works fine on my ROG Ally X without having to do any of the above (worked out the box). That is also running Windows 11 (specs can be found online).

Diagnostics on PC below.

[DxDiag]
------------------
System Information
------------------
Operating System: Windows 11 Pro 64-bit (10.0, Build 26100) (26100.ge_release.240331-1435)
System Manufacturer: Gigabyte Technology Co., Ltd.
System Model: B650E AORUS ELITE X AX ICE
BIOS: F32 (type: UEFI)
Processor: AMD Ryzen 7 7800X3D 8-Core Processor (16 CPUs), ~4.2GHz
Memory: 65536MB RAM
DirectX Version: DirectX 12
DX Setup Parameters: Not found
User DPI Setting: 96 DPI (100 percent)
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
Miracast: Available, no HDCP
Microsoft Graphics Hybrid: Supported
DirectX Database Version: 1.7.0

---------------
Display Devices
---------------
Card name: NVIDIA GeForce RTX 4070 Ti SUPER
Display Memory: 48377 MB
Dedicated Memory: 16063 MB
Shared Memory: 32314 MB
Current Mode: 1920 x 1080 (32 bit) (60Hz)
HDR Support: Not Supported
Display Topology: Internal
Display Color Space: DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709
Color Primaries: Red(0.638672,0.338867), Green(0.308594,0.619141), Blue(0.156250,0.058594), White Point(0.313477,0.329102)
Display Luminance: Min Luminance = 0.500000, Max Luminance = 270.000000, MaxFullFrameLuminance = 270.000000
Monitor Name: Generic PnP Monitor
Monitor Model: VS278
Monitor Id: ACI27A1
Native Mode: 1920 x 1080(p) (60.000Hz)
Output Type: HDMI
Monitor Capabilities: HDR Not Supported
Display Pixel Format: DISPLAYCONFIG_PIXELFORMAT_32BPP
Advanced Color: Not Supported
Using DDisplay: Yes
WCG: Wcg Not Supported
Active Color Mode: DISPLAYCONFIG_ADVANCED_COLOR_MODE_SDR
Driver File Version: 32.00.0015.7640 (English)
Driver Version: 32.0.15.7640
DDI Version: 12

[MSInfo]
---------------
System Summary
---------------
OS Name Microsoft Windows 11 Pro
Version 10.0.26100 Build 26100
System Manufacturer Gigabyte Technology Co., Ltd.
System Model B650E AORUS ELITE X AX ICE
System Type x64-based PC
Processor AMD Ryzen 7 7800X3D 8-Core Processor, 4201 Mhz, 8 Core(s), 16 Logical Processor(s)
BIOS Version/Date American Megatrends International, LLC. F32, 14/08/2024
SMBIOS Version 3.7
Embedded Controller Version 255.255
BIOS Mode UEFI
BaseBoard Manufacturer Gigabyte Technology Co., Ltd.
BaseBoard Product B650E AORUS ELITE X AX ICE
Platform Role Desktop
Secure Boot State Off
PCR7 Configuration Elevation Required to View
Windows Directory C:\WINDOWS
System Directory C:\WINDOWS\system32
Hardware Abstraction Layer Version = "10.0.26100.1"
Installed Physical Memory (RAM) 64.0 GB
Total Physical Memory 63.1 GB
Available Physical Memory 50.0 GB
Total Virtual Memory 67.1 GB
Available Virtual Memory 48.7 GB
Page File Space 4.00 GB
Page File C:\pagefile.sys
Kernel DMA Protection Off
Virtualization-based security Running
Virtualization-based security Required Security Properties
Virtualization-based security Available Security Properties Base Virtualization Support, DMA Protection, UEFI Code Readonly, SMM Security Mitigations 1.0, Mode Based Execution Control
Virtualization-based security Services Configured Hypervisor enforced Code Integrity
Virtualization-based security Services Running Hypervisor enforced Code Integrity
App Control for Business policy Enforced
App Control for Business user mode policy Off
Automatic Device Encryption Support Elevation Required to View
A hypervisor has been detected. Features required for Hyper-V will not be displayed.

---------------
Components > Display
---------------
Name NVIDIA GeForce RTX 4070 Ti SUPER
PNP Device ID PCI\VEN_10DE&DEV_2705&SUBSYS_895B1043&REV_A1\4&D0BDF66&0&0009
Adapter Type NVIDIA GeForce RTX 4070 Ti SUPER, NVIDIA compatible
Adapter Description NVIDIA GeForce RTX 4070 Ti SUPER
Adapter RAM (1,048,576) bytes
Installed Drivers C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_a991e39d9975490a\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_a991e39d9975490a\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_a991e39d9975490a\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_a991e39d9975490a\nvldumdx.dll
Driver Version 32.0.15.7640
INF File oem42.inf (Section079 section)
Color Planes Not Available
Color Table Entries 4294967296
Resolution 1920 x 1080 x 60 hertz
Bits/Pixel 32
Driver C:\WINDOWS\SYSTEM32\DRIVERSTORE\FILEREPOSITORY\NV_DISPI.INF_AMD64_A991E39D9975490A\NVLDDMKM.SYS (32.0.15.7640, 106.05 MB (111,204,480 bytes), 12/05/2025 21:28)

Name AMD Radeon(TM) Graphics
PNP Device ID PCI\VEN_1002&DEV_164E&SUBSYS_D0001458&REV_CB\4&16012499&0&0041
Adapter Type AMD Radeon Graphics Processor (0x164E), Advanced Micro Devices, Inc. compatible
Adapter Description AMD Radeon(TM) Graphics
Adapter RAM 512.00 MB (536,870,912 bytes)
Installed Drivers C:\WINDOWS\System32\DriverStore\FileRepository\u0400893.inf_amd64_f1f0fd405b4eecb6\B399385\aticfx64.dll,C:\WINDOWS\System32\DriverStore\FileRepository\u0400893.inf_amd64_f1f0fd405b4eecb6\B399385\aticfx64.dll,C:\WINDOWS\System32\DriverStore\FileRepository\u0400893.inf_amd64_f1f0fd405b4eecb6\B399385\aticfx64.dll,C:\WINDOWS\System32\DriverStore\FileRepository\u0400893.inf_amd64_f1f0fd405b4eecb6\B399385\amdxc64.dll
Driver Version 31.0.22044.1
INF File oem24.inf (ati2mtag_Raphael section)
Color Planes Not Available
Color Table Entries 4294967296
Resolution 1920 x 1080 x 60 hertz
Bits/Pixel 32
Driver C:\WINDOWS\SYSTEM32\DRIVERSTORE\FILEREPOSITORY\U0400893.INF_AMD64_F1F0FD405B4EECB6\B399385\AMDKMDAG.SYS (31.0.22044.1, 101.63 MB (106,568,312 bytes), 04/09/2024 01:48)