AMD graphics driver is broken (Gran Turismo 5) using 1080P output

[papagoghub]

Quick summary

AMD graphics card drivers will be damaged starting from 25.3.1 (Gran Turismo 5) Using 1080P output screen

Details

v25.3.2, v25.4.1 drivers will also be damaged v24.5.1 ~ v25.2.1 drivers are normal

Attach a log file

RPCS3.log.gz

Attach capture files for visual issues

System configuration

i5-12500 , AMD RX6600 , Windows10 22H2

Other details

No response

[AniLeo]

Missing RSX capture file

[papagoghub]

BCAS20108_20250426023317_capture.rrc.gz

Is this it? Haven't used this feature.

[kd-11]

Probably one of our speedhacks broke.

1. Try enabling "Strict Rendering Mode" in GPU tab.
2. Try disabling MSAA

Let me know if any of those options has any effect.

[papagoghub]

可能是我們的某個速度駭客程式壞了。

1. 嘗試在 GPU 標籤中啟用「嚴格渲染模式」。
2. 嘗試停用 MSAA

如果這些選項有任何效果，請告訴我。

I've tried these two before. Strict rendering is invalid MSAA Off is effective The conclusion is that the latest v25.3.1, v25.3.2, and v25.4.1 drivers will cause 1080P+MSAA output to be damaged, but 720P output will not be damaged.

[kd-11]

The method we use to implement MSAA is technically a hack unless you're running hardware that is doing checkerboarded pattern for multiple samples. Fortunately for us this is what most GPUs do internally, so it "just works", but if the manufacturer decides to use some other distribution pattern the hack falls apart. This is the reason we never added custom MSAA ratios like 8x or 16x. I'll try to devise an updated workaround that dodges the issue, but long term we need our own method of simulating MSAA with supersampling.

[papagoghub]

我們用來實現 MSAA 的方法在技術上是一種駭客技術，除非您運行的硬體對多個樣本進行棋盤格圖案處理。對我們來說幸運的是，這是大多數 GPU 內部所做的，因此它“可以正常工作”，但如果製造商決定使用其他分佈模式，則駭客攻擊就會失敗。這就是我們從未添加自訂 MSAA 比率（如 8x 或 16x）的原因。 我會嘗試設計一個更新的解決方法來解決這個問題，但從長遠來看，我們需要自己的方法來透過超級取樣模擬 MSAA。

I understand, thanks for your reply. It seems that we can only come up with a new corresponding general solution due to the manufacturer's change in method.

[digant73]

@papagoghub is that still an issue?

[kd-11]

There is a general issue with rpcs3 and radeon. It has been reported already, we're waiting for AMD's fix.