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I just got 5k2k (5120x2160) @ 100Hz smoothly on a desktop mode (Razr Fold) HOLY COW (i.redd.it)

submitted 21 hours ago by piddlefaffle12<br>7 comments<br>share<br>save<br>hide<br>report

HOLY SMOKES I DID IT!!!!

FINALLY, a foldable that I can dock to my 5K2K Ultrawide or my Samsung 3440x1440 UW at a high refresh rate!!

5k2k (5120x2160) @ 100Hz smoothly IS INSANE AND WHAT I WANTED for YEARS NOW, going back all the way to the Motorola Atrix and the lapdock!

I had to reverse engineer several things.

First was msm_drm.ko - Qualcomm/Moto didn't enable DSC (Display Stream Compression) for DisplayPort. Had to patch the kernel to enable DSC for DP!

Then I had to do a Framework patch (services.jar / DisplayManagerFlags, removes AOSP's external-display mode-limit governor so the framework even offers modes >5.54 MP (5120, 4K).

THEN had to hack Moto's desktop ("ReadyFor"/Smart Connect) builds its mode list via LocalDisplayAdapter$LocalDisplayDevice.getDisplayDeviceInfoLocked() → getMaxResolution(), which capped resolution to ≤ the active mode AND hardcoded every entry to 60 Hz. The R4 helper hooks getDisplayDeviceInfoLocked() and rebuilds supportedReadyForModes from the device's real mSupportedModes — every distinct resolution at its true max refresh (so 3440×1440@100, 5120@60, etc. actually get offered with correct rates, instead of a 60 Hz-capped, resolution-clamped list).

If Samsung for anyone else tells you that high refresh rate is not possible on Dex or any other desktop on modern SoCs, it's an intentional choice. The SoC can do it just fine!

Of course, this means that if Apple wanted to, and they proved it wth the Neo, macOS could run if you docked an iPhone to a monitor (or iPad). No one wants to as they don't want to "cannibalize" sales of their desktops. Total BS! We have supercomputers in our pockets!

https://github.com/zorrobyte/razr-fold-2026-display

Code is here! It's a crying shame that Samsung doesn't allow root, I'd be all over their hardware getting Dex at 5k 100Hz if they didn't lock down their hardware.

Should be possible on Pixel?

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