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PCSX2
[BUG]: Lord of the Rings the Return of the King Black screen. SLES-52019 PAL FR
Describe the Bug
Pcsx2-v1.7.2838 and all later versions break the game. Instead of showing the memory cards screen after the initial loading screen. I am welcomed with a black screen and can't progress further. However with pcsx2-v1.7.2837 the game works correctly.
Reproduction Steps
Launch the game with any pcsx2 version above pcsx2-v1.7.2837.
Expected Behavior
No response
PCSX2 Revision
pcsx2-v1.7.3307-windows-64bit-AVX2-Qt
Operating System
Windows 10 (64bit)
If Linux - Specify Distro
No response
CPU
i7 5960x
GPU
rtx 2080ti
GS Settings
All default settings.
Emulation Settings
All default settings.
GS Window Screenshots
No response
Logs & Dumps
No response
Sorry for late answer. I tested this, and there is something else going on. While this was actually broken in https://github.com/PCSX2/pcsx2/pull/6270 ,fix from https://github.com/PCSX2/pcsx2/pull/6325 make it work again when applied directly to https://github.com/PCSX2/pcsx2/pull/6270 codebase. This means something between 6270 and 6325 make it broken too.
Currently on master game don't even reach code that search for mpeg start code. Just loops in mpeg2sliceIDEC while(1). Other info i gathered. Game tries to set IPUfrom QWC to 0x10000, that transfer is terminated by pcsx2 few moments later, then game try with QWC 0xFFC0, and that goes on, and finally with 0x40, which also seems to go ok, but in the end, there is 1 qwc left in INPUT fifo somehow. That why game does not proceed.
huh interesting! Well, I did do a bunch of IPU DMA changes... maybe the answer lies in there, I guess I have some debugging to do :D
Thanks for getting back to us :)
It is indeed a timing problem, it broke further with https://github.com/PCSX2/pcsx2/commit/3cb99bad79125b61b93cfa4762067839a74e1920
But I don't think that's necessarily wrong, it's just a bad sequence of timed events.. Gonna have to dig in to it :(
Started looking at it, haven't really finished but what I noticed so far.
it starts off the IPU and sets off the DMA's, both the working and non-working versions do the 0x10000 QWC thing, but the game expects that to fail, because if you kill the transfer or not, it starts the correct one.
When the game is doing an IDEC at the start after a couple of FDEC's, as soon as IPU0 runs out of QWC, IDEC still hasn't finished, but the game is using the IPU0 DMA finishing as a trigger for it ending, so it immediately tries to do an FDEC even though the IDEC is still going, so everything is all outta whack.
I don't see any resets or stopping/starting DMA's in the middle so I'm unsure why modifying timing helps the original :/
As I say, gonna investigate further, but had other stuff come up which I've been dealing with.
HI, I tried the pcsx2-v1.7.3761-windows-64bit-AVX2-Qt.7z version today and the game seems to run correctly.
It's still broken here, and I wouldn't expect it to be fixed, nothing has been changed relating to IPU emulation.
I have the same issue but the serial of my game is SLES-52020 and my PCSX2 version is Nightly SSE4 Qt 1.7.4240.
Maybe this will help: ZST file.zip
It's not a GS problem so a GS dump is no good. I have the game, I just haven't gotten around to fixing it yet.
But thanks for trying.