Emulator Issues #7880
Deterministic Dualcore is not 100% compatible with games
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Metroid Prime 2 Echoes/Metroid Prime 3: Corruption
What's the problem? Describe what went wrong in few words.
The games effectively freeze on boot when deterministic dual core is set to "fake-completion". They display only a white dot in the middle of the screen with FPS 4 VPS 60.
Setting deterministic dual core to "auto" or "none" allows the games to boot, but they then suffer the classic "black bar" issue.
What did you expect to happen instead?
I expected the games to boot normally.
What steps will reproduce the problem?
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1. Open the ISO properties for MP2/MP3
2. Set "deterministic dual core" to "fake-completion"
3. Boot either game
Dolphin 3.5 and 3.5-367 are old versions of Dolphin that have
known issues and bugs, so don't report issues about them and test the
latest Dolphin version first.
Which versions of Dolphin did you test on?
4.0-4161 (works), 4.0-4173 (works), 4.0-4191 (works), 4.0-4197 (works), 4.0-4199 (works), 4.0-4203 (broken), 4.0-4205 (broken), 4.0-4215 (broken), 4.0-4250 (broken)
Does using an older version of Dolphin solve your issue? If yes, which
versions of Dolphin used to work?
Yes; 4.0-4199 and earlier work just fine.
What are your PC specifications? (including, but not limited to: Operating
System, CPU and GPU)
OS: Windows 8.1 x64
CPU: Intel Core i7-4770k @4.4Ghz
GPU: Nvidia GeForce GTX 970
Is there any other relevant information? (e.g. logs, screenshots,
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I made sure that no cheats were enabled so I could rule them out as a cause. It appears that 4.0-4203 (the fifo-overflow-fix merger) caused this issue.
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#4 Updated by JMC4789 over 6 years ago
It worked at one point; but like we also said; it's not guaranteed to work with every title.
This is a hack mostly used to make Dualcore Deterministic more than anything; it fixing issues and being used for that purpose wasn't completely intended. It's a netplay feature. I don't want to say "wontfix" on this issue because it's very likely that locking, or another feature along those lines, will open it up for us to do a much more complete dualcore determinism mode.
#8 Updated by Autoran1 about 6 years ago
made a little hack to make Metroid2&3 work with fake-completion
without reverting whole PR 1536
#9 Updated by autofire372 about 6 years ago
Your hack, unfortunately, causes the Metroid Prime games to fail with endless "SetInterrupt from wrong thread" errors if they aren't started in fake-completion mode.
Additionally, MP2's Scan Visor fails to work consistently with it, regardless of EFB settings.