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v0.8.3-alpha: GPU-mismatch startup-crash fix (two-GPU PCs)

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@Firejumper93 Firejumper93 released this 10 Aug 23:21
· 3 commits to main since this release
v0.8.3-alpha
0d36600

The startup crash points to a two-GPU problem, and v0.8.3 both guards against it and proves it.

Tester logs narrowed it hard. The same v0.8.2 build ran flawlessly on Virtual Desktop for one tester (15,554 frames, 90 fps) and froze at frame 1 for another. Same build, same runtime, opposite result, so it was never the build or the compiler or Virtual Desktop. The difference is the PC, and the strong lead is a GPU mismatch. v0.8.3 adds the detection that confirms it in the log and stops the freeze.

What was actually happening

The crashing PC had two GPUs: a discrete graphics card plus the integrated graphics built into its CPU (common on AMD Ryzen 7000/9000 and many Intel chips). The headset runtime used the graphics card, but Windows was running the game on the CPU's built-in GPU. Frames cannot be shared across two different GPUs, so the VR view rendered exactly one frame and then hung. That is the black-screen-then-crash.

What v0.8.3 changes

  • The mod now detects a GPU mismatch at startup. Instead of freezing the game, it keeps running on your flat monitor and writes a clear, step-by-step fix to the log. This protection is ON by default, including for people who UPDATE and keep their old config.
  • If you were crashing, the log now tells you exactly what to do, and so does INSTALL.txt.

If you hit the black-screen crash, do ONE of these and relaunch

Run v0.8.3 first: your GRWVR\grwxr-<pid>.log will now say plainly whether the game and headset are on different GPUs. If it reports a mismatch, force the game onto your graphics card. In order of what actually works:

  1. Plug your monitor into your graphics card's ports, not the motherboard's HDMI/DisplayPort. This is the most reliable fix by far.
  2. Disable the CPU's built-in graphics in Device Manager (or BIOS).
  3. NVIDIA Control Panel / AMD Software: set GRW.exe's preferred GPU to your graphics card.
  4. Windows Settings > System > Display > Graphics: GRW.exe = High performance. (Note: this one often does NOT move the game off the built-in GPU on its own; if it doesn't, use 1 or 2.)

Single-GPU PC and still crashing? Please open a GitHub issue with your GRWVR\grwxr-<pid>.log.

Everything else

Same as v0.8.2: the weapon follows your right controller, bullets follow your gaze (aim down sights to shoot accurately), full stereo at 72 Hz, true first person, head aim, Touch as an emulated gamepad. Note that the research draw-probes stay off by default.

Solo campaign only. Never co-op, PvP, or matchmaking (the game ships Easy Anti-Cheat). Offline mode recommended. Your antivirus may flag dxgi.dll; INSTALL.txt explains why.

Optional, never required: a donation page exists at buymeacoffee.com/firejumper93 for anyone who has asked. The mod is free and stays free.

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