Android, ZFold6, MelonDS has touch screen "dead zone" | libretro | Page 1

covert heart Apr 24, 2025, 10:39 PM

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I have attached my most recent RA log file and a screen recording of my issue in action.

Whenever I'm playing a Nintendo DS game on RetroArch Android 1.19.1, in the touchscreen area of my screen, the game will consistently "lose" any input if I click and drag into the right half or so of the touch screen area, as you can see in my attached Ghost Trick footage. This occurs for any input method, I tested with touch and stylus and it happened in both instances.
This only appears to occur when I play on my Galaxy ZFold 6 with the screen folded out, and in any orientation. When playing in normal mode, the touchscreen does not have this issue. This issue also persists in both MelonDS and MelonDS DS cores and regardless of if I have the optional NDS bios files on my phone.
Is this one of the issues I keep hearing about that came up from enabling stylus input in RA Android?

📎 retroarch__2025_04_24__16_43_51.log

covert heart Apr 29, 2025, 8:34 PM

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After poking around more, I have determined that this is some sort of issue with the Nintendo DS on-screen control overlays. For whatever reason, both the DS and DSi layouts have some invisible element under the Y face button that blocks input.
I tried running the overlay update but the issue is still present. I want to go into the files and see about deleting the 2 DS overlays and basically force it to re-install the files, but I have no idea how to get to /data/user/0 on my phone. Does anyone know a potentially easier way to remove and update this problematic overlay?

covert heart Apr 29, 2025, 9:14 PM

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I submitted this issue to the libretro common-overlays github to hopefully get some eyes on the issue:
https://github.com/libretro/common-overlays/issues/158

GitHub

Nintendo DS overlays on Android have a "dead zone" under the Y butt...

When using RetroArch Android 1.19.1 (the one that still has stylus support) on my Samsung ZFold 6 in open mode and landscape orientation, the lower touch screen area of the DS in the emulator appea...

viscid roost May 4, 2025, 4:37 PM

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that's in portrait mode? or landscape?

covert heart May 4, 2025, 4:38 PM

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Landscape

viscid roost May 4, 2025, 4:40 PM

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okay, there were a couple of vestigial "null" buttons in there that I moved off of the screen that might have been the culprit

covert heart May 4, 2025, 4:44 PM

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That was my guess as to what was going on too

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I will update my overlays in a bit and see if that fixed the issue

viscid roost May 4, 2025, 4:49 PM

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k, yeah, i just pushed the changes up, so they should hit the online updater in a little while

covert heart May 4, 2025, 5:11 PM

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LOL, I tried it just now and still had the issue, so I'll check the updater again in a few hours

viscid roost May 4, 2025, 5:29 PM

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yeah, probably gonna take an hour or two to get there

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if it's not working by tonight, something else must be amiss (or I edited the wrong overlays)

covert heart May 4, 2025, 11:04 PM

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I tested it again just now and the dead zone is gone
Thanks a bunch!

viscid roost May 4, 2025, 11:12 PM

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w0000t, I'm glad to hear it, and I'm glad it was that easy

#Android, ZFold6, MelonDS has touch screen "dead zone"