Emulator

Could you record a fifolog of this issue? Here's how to do it:

1. Go to the part in-game where the issue appears.
2. Open Tools in the menu bar -> FIFO Player.
3. Press Record.
4. Press Save. You will be prompted to save a .dff file.
5. Upload the .dff file here or elsewhere (you may need to compress it in a zip or similar to make it smaller).

This will help us debug the issue.

Thank you!

I played these fifologs on my MacBook Pro and can't reproduce the issue. It does seem to be M1-specific. I'll take a look at this later.

For reference, my specs:
MacBook Pro 16" (2019)
Intel i9
Intel UHD 630
AMD Radeon Pro 5500M

Small update - I was able to reproduce this issue on an M1 Mac Mini using the fifologs. (Oddly, this issue apparently does not occur on the mobile line of Apple Silicon chips.)

Specs:
Mac Mini (Late 2020)
Apple M1
macOS Big Sur 11.6

OatmealDome wrote:

Small update - I was able to reproduce this issue on an M1 Mac Mini using the fifologs. (Oddly, this issue apparently does not occur on the mobile line of Apple Silicon chips.)

Specs:
Mac Mini (Late 2020)
Apple M1
macOS Big Sur 11.6

At first I thought at the time it was an issue related to Rosetta when I acquired my M1 Air last December, but its been happening across all the versions of Big Sur released this year, I was hoping it would get fixed once the Dolphin Team released the M1 Native version of Dolphin but it kept happening regardless.

To add salt to the injury this issue is also happening under Windows 10/11 running on a Parallels virtual machine. With a windows native build of Dolphin and with the graphic adapter set to DX11.

Now that you mentioned you tested this bug on an M1 equipped iPad and it didn't happened adds even more confusion to this puzzle as it's exactly the same chip...

So it seems to be something related to the relationship between the Mac's M1's + Big Sur on how they control the M1's GPU?

It would be wise to test again with MacOS Monterey due to being released next week see if this issue get's fixed and confirm indeed it was a Big Sur issue since the beginning?

I had a chance to look in the Xcode GPU debugger. This issue appears to be the same one that causes Sonic Adventure 2: Battle to render as all-black (https://bugs.dolphin-emu.org/issues/12523) and Super Mario Sunshine's M warps to have a black box surrounding them.

I have a fix for this, but I haven't submitted a pull request yet.

Specs:
Mac Mini (late 2020)
Apple M1
macOS Monterey 12.0.1

The PR that was merged was not intended to fix this issue. (However, it was a prerequisite before I could open the PR for the fix, so I should get on that.)

Thanks for testing Monterey 12.1. I was hoping Apple would fix the bug in the OS eventually, but I guess that didn't happen.

Could you test PR 10290? Here's a build:

https://dl.dolphin-emu.org/prs/42/88/pr-10290-dolphin-latest-universal.dmg

OatmealDome wrote:

Thanks for testing!

I've been updating Dolphin to the very latest dev builds (currently 16120) and the issue is still there, did the PR you sent me to test a few months back which fixed the issue was ever merged to main?

It hasn't been merged yet. You can check its status at https://github.com/dolphin-emu/dolphin/pull/10290