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.
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 . 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