Auto res + widescreen patch = Dolphin heuristic can't decide which [Lost Kingdoms 2]

[Habanero]

Game Name?

Lost Kingdoms 2

Game ID?

GR2E52

MD5 Hash? (right click the game in the game list, Properties, Verify tab, Verify Integrity button)

37d3f930fd53334040f4dfcce94970c8

Redump status: Good dump

What's the problem? Describe what went wrong.

Using the Widescreen Gecko code 042EA1A0 3FE38E39 with aspect ratio set to Auto causes Dolphin to rapidly switch between the game's native 4:3 and the patch's 16:9 when the camera is at certain angles (the hallway in this case).

What steps will reproduce the problem?

Apply the Gecko code
Set aspect ratio to Auto
Happens within 5 seconds of the very first level

Turning the Gecko code off, or setting the aspect ratio to force 16:9 or force 4:3 seems to avoid the issue.

Is the issue present in the latest development version? For future reference, please also write down the version number of the latest development version.

Dolphin
5.0-11476

Is the issue present in the latest stable version?

Yes (Dolphin 5.0-11476 )

What are your PC specifications? (CPU, GPU, Operating System, more)

Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_ldr_escrow.181110-1429)
Processor: Intel® Core™ i5-2500K CPU @ 3.30GHz (4 CPUs), ~3.3GHz
Memory: 16384MB RAM
Video: AMD Radeon 7950

Is there anything else that can help developers narrow down the issue? (e.g. logs, screenshots,
configuration files, savefiles, savestates)

Save state:
https://www.mediafire.com/file/k6cg92k9mek4m1s/GR2E52.s01

https://streamable.com/aukz6

This issue was mentioned before.
https://forums.dolphin-emu.org/Thread-splinter-cell-keeps-flickering-from-4-3-aspect-ratio-to-16-9
https://bugs.dolphin-emu.org/issues/9895
https://github.com/dolphin-emu/dolphin/pull/5008

Per-game settings (everything else should be on default last I checked):

[Core]
CPUThread = True
MMU = True
FPRF = True
SyncGPU = True
DSPHLE = True
GFXBackend = OGL
CPUCore = 1
[DSP]
Backend = XAudio2

[Video_Stereoscopy]
StereoEFBMonoDepth = True

[Video_Settings]
InternalResolution = 8
MSAA = 1
SSAA = False
AspectRatio = 0
SafeTextureCacheColorSamples = 512
HiresTextures = True

[Video_Hardware]
VSync = True

[Video_Enhancements]
MaxAnisotropy = 4

[Gecko]
$Lost Kingdoms 2 Widescreen
042EA1A0 3FE38E39

[Gecko_Enabled]
$Lost Kingdoms 2 Widescreen

If you need more, I can try to provide it. Presuming that this isn't my own screw-up, I can also submit it to the bug report queue. Thanks.

[JosJuice]

The automatic aspect ratio detection has been known to do this in some cases, so I think this is a valid issue. It would be nice if you reported it on the issue tracker, so that it'll be easier for us to keep track of.

[Habanero]

Will do. I suspect it's because of the camera angle and the perspective of the hallway clashing somehow.

[Habanero]

(01-14-2020, 08:03 AM)JosJuice Wrote: The automatic aspect ratio detection has been known to do this in some cases, so I think this is a valid issue. It would be nice if you reported it on the issue tracker, so that it'll be easier for us to keep track of.

I've heard from another user that this is a fairly new problem (happening in Animal Crossing as well). Did a recent update break things?