Why does my game show a black screen on some GPUs?

Usually because a shader fails to compile or run on those GPUs, due to driver differences, precision issues, or unsupported features, so nothing renders, it is a GPU-specific rendering failure. A black screen on some GPUs but not others is almost always a shader or rendering issue specific to that hardware: a shader that compiles and runs on your GPU fails on a different GPU (different driver, precision handling, or unsupported operations), or a graphics feature your rendering uses is unsupported on that GPU, so nothing gets drawn (a black screen). These are invisible on your GPU (where the shaders work) and only show on the affected hardware. To find them, capture the crashes/errors with GPU/device context, black screens often cluster on particular GPUs, pointing at a GPU-specific shader or rendering failure. Bugnet captures crashes and errors with device/GPU context, so you can see which GPUs show the black screen (the hardware pattern) and that it is a rendering issue specific to that hardware, with the context to diagnose it, so you can fix the shader/rendering for the affected GPUs (compatible shaders, handling compilation failures, fallbacks, supporting the features) and verify per version the screen renders on those GPUs, fixing a rendering failure specific to GPUs you may not own.

How do I test shaders across different GPUs?

Test on a range of real GPUs (different vendors and generations), and capture the shader/rendering failures real players hit on GPUs you cannot test, since GPU and driver differences cause shader failures you will not see on your GPU. Testing shaders only on your GPU is a common mistake: the wide range of GPUs and drivers means shaders that work on yours can fail on others (crashes, black screens, glitches), and your GPU is not representative. To test: run your game on a representative range of real GPUs (different vendors like NVIDIA/AMD/Intel and mobile GPUs, different generations), checking that shaders compile and render correctly. Since you cannot test every GPU, capture the shader/rendering issues real players hit. Bugnet captures crashes and errors with GPU/device context from the field, so the shader failures on GPUs you did not test become visible (the rendering crashes and black screens clustering by GPU), letting you see which GPUs have shader problems and fix the shaders for them (handling their differences, providing fallbacks), and verify per version the issues stopped on those GPUs, ensuring your shaders work across the range of GPUs players use rather than only your own.

How do I handle shader compilation failures?

Handle compilation failures gracefully (do not crash), provide fallback shaders or simpler rendering paths for GPUs that fail, and test across GPUs to catch failures before players hit them. Shaders can fail to compile on certain GPUs (driver differences, unsupported operations, precision issues), and the mistake is not handling that, so a compilation failure crashes the game or shows a black screen. To handle it: check for shader compilation success and handle failure gracefully (fall back rather than crashing), provide fallback shaders or simpler rendering paths for GPUs where your primary shaders fail (so the game still renders, even if less fancy), avoid relying on features or operations that some GPUs do not support (or detect support and adapt), and test across GPUs to catch failures before release. Capture the failures players hit on GPUs you did not test. Bugnet captures the crashes and rendering failures from shader compilation issues with GPU context, so you can see which GPUs your shaders fail to compile on (clustering by hardware), add graceful handling and fallbacks for them, and verify per version the failures stopped, so a shader that fails on some GPUs degrades to a fallback rather than crashing or showing a black screen, keeping the game rendering across the GPU range.

Common Shader Mistakes

Quick answer: The biggest shader mistakes are shader compilation failures on some GPUs, not testing across GPUs, expensive shaders, and no fallbacks, fix these by testing across GPUs and providing fallbacks.

Shaders run on diverse GPUs, and common mistakes cause crashes, black screens, and performance problems. Here are the most common shader mistakes and how to avoid them.

Shaders That Fail on Certain GPUs

A common shader mistake is shaders that compile and run on your GPU but fail on others, due to driver differences, precision issues, or unsupported features, causing crashes, black screens, or visual glitches on those GPUs. Shader failures are often GPU-specific.

The fix is testing shaders across GPUs and handling compilation failures gracefully. Bugnet captures the crashes and black-screen issues shader failures cause with device/GPU context, so you can see which GPUs your shaders fail on (the rendering crashes clustering on certain hardware) and fix them, catching shader issues your GPU does not surface.

Not Testing Across GPUs

A second mistake is testing shaders only on your GPU, so GPU-specific shader failures, crashes, black screens, glitches, ship to players on other GPUs. The wide range of GPUs and drivers means your GPU is not representative.

The fix is testing across a range of GPUs and capturing issues from the rest. Bugnet captures crashes with GPU context from the field, so the shader/rendering failures on GPUs you did not test become visible (clustering by GPU), letting you fix the GPU-specific shader issues your hardware does not show.

Writing Expensive Shaders

A third mistake is expensive shaders that tank performance on weaker GPUs, so the game runs badly on the lower-end hardware many players use. A shader that is fine on your powerful GPU can overwhelm a weak one.

The fix is keeping shaders efficient and offering scalable quality. Bugnet captures performance data with device context, so you can see whether expensive shaders are tanking performance on weaker GPUs and confirm per version that optimizing them (or scaling down) improved performance on the affected devices.

Avoid the big shader mistakes: shader compilation failures on some GPUs, not testing across GPUs, expensive shaders, and no fallbacks. Test across GPUs and provide fallbacks.