invalid ppi samsung
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invalid ppi samsung

adb shell wm density reset Then restart both displays by switching folding mode twice.

Invalid PPI (0,0) for display 1, skipping content scaling A third‑party launcher forced the outer display to a non‑standard DPI via wm density . When the inner display activated, its PPI was calculated relative to the outer’s modified value, resulting in zero.

Samsung’s vendor tree requires exact PPI values for overlay generation. A missing or incorrect ppi parameter in BoardConfig.mk or device_samsung_*.mk . 3. Root Cause Analysis | Cause Category | Technical Explanation | |----------------|------------------------| | Build.prop corruption | ro.sf.lcd_density deleted or set to 0. Samsung devices use values like 420 (Galaxy S21), 515 (S22 Ultra), 640 (Fold inner display). | | Resolution switching bug | Samsung’s SmartProps service sometimes fails to recompute PPI after changing screen zoom or resolution. | | Hardware read failure | Display driver IC (DDIC) does not return correct physical dimensions via DisplayInfo . Common after screen replacement with non‑original part. | | Multi‑display race condition | On Z Fold series, switching between inner (7.6″) and outer (6.2″) displays can cause momentary invalid PPI for the inactive display. | | App target SDK mismatch | Apps targeting Android 12+ that don’t handle multiple display densities correctly may crash when Samsung’s WindowManager returns fallback values. | 4. Diagnostic Procedures 4.1. Check Current Display PPI on Samsung Device Method 1 – ADB:

Camera2: Invalid PPI reported by DisplayManager - using 420 dpi default Apps that query DisplayMetrics receive xdpi or ydpi = 0.0 or negative, often due to a transient display manager state. 2.4. Custom Development (TWRP, LineageOS, Kernel Compilation) Error: error: invalid PPI value in device tree during lunch or brunch .

adb shell su mount -o rw,remount /system echo "ro.sf.lcd_density=420" >> /system/build.prop # adjust to your model reboot In /vendor/build.prop add:

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Invalid Ppi Samsung May 2026

adb shell wm density reset Then restart both displays by switching folding mode twice.

Invalid PPI (0,0) for display 1, skipping content scaling A third‑party launcher forced the outer display to a non‑standard DPI via wm density . When the inner display activated, its PPI was calculated relative to the outer’s modified value, resulting in zero. invalid ppi samsung

Samsung’s vendor tree requires exact PPI values for overlay generation. A missing or incorrect ppi parameter in BoardConfig.mk or device_samsung_*.mk . 3. Root Cause Analysis | Cause Category | Technical Explanation | |----------------|------------------------| | Build.prop corruption | ro.sf.lcd_density deleted or set to 0. Samsung devices use values like 420 (Galaxy S21), 515 (S22 Ultra), 640 (Fold inner display). | | Resolution switching bug | Samsung’s SmartProps service sometimes fails to recompute PPI after changing screen zoom or resolution. | | Hardware read failure | Display driver IC (DDIC) does not return correct physical dimensions via DisplayInfo . Common after screen replacement with non‑original part. | | Multi‑display race condition | On Z Fold series, switching between inner (7.6″) and outer (6.2″) displays can cause momentary invalid PPI for the inactive display. | | App target SDK mismatch | Apps targeting Android 12+ that don’t handle multiple display densities correctly may crash when Samsung’s WindowManager returns fallback values. | 4. Diagnostic Procedures 4.1. Check Current Display PPI on Samsung Device Method 1 – ADB: adb shell wm density reset Then restart both

Camera2: Invalid PPI reported by DisplayManager - using 420 dpi default Apps that query DisplayMetrics receive xdpi or ydpi = 0.0 or negative, often due to a transient display manager state. 2.4. Custom Development (TWRP, LineageOS, Kernel Compilation) Error: error: invalid PPI value in device tree during lunch or brunch . Samsung’s vendor tree requires exact PPI values for

adb shell su mount -o rw,remount /system echo "ro.sf.lcd_density=420" >> /system/build.prop # adjust to your model reboot In /vendor/build.prop add:

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