[One UI 8 / DeX] No way to scale UI on external 4K monitor independently? MultiStar gone, ADB doesn't work
Hey everyone,
I'm running a Samsung Galaxy Tab S11 Ultra on One UI 8 with a 4K external monitor via DeX, and I'm struggling with a scaling issue that seems to have no solution anymore.
**The problem:** Everything on the external monitor is tiny – icons, text, and especially the Android navigation bar (Home, Back, Recents) are extremely small at 4K resolution.
**What I've tried:**
- DeX settings → Display size / Font size → maxed out both, no effect on the external monitor
- Developer Options → Smallest Width → changing the value only affects the tablet screen, not DeX
- ADB: `wm density 200 --display 1` / `--display 2` / `--display 11` / `--display 4627039422300187649` (the actual SurfaceFlinger hardware ID) → only the internal tablet display reacts, DeX monitor is completely unaffected
- Good Lock → MultiStar → not available on One UI 8
From what I can tell, Samsung has completely decoupled DeX display handling from the standard Android display/ADB system in One UI 8. The external monitor shows up as Display 11 / "HDMI-Bildschirm" in SurfaceFlinger, but `wm density` simply ignores it.
**My question:** Has anyone found a working solution to independently scale the DeX UI on an external monitor under One UI 8? Is there any ADB command, hidden setting, or app that actually works?
Any help appreciated!