How change DPI on primary display ?

[mlabra]

The --new-display can set DPI, but how make it in the primary display?

The --new-display alone whitout --start-app, have some problems, black screen.

I try --new-display=/240 --start-app=com.android.system, but can't unblock the "new android".

Some idea ?

THX.

[rom1v]

The --new-display can set DPI, but how make it in the primary display?

The primary display already exists, so scrcpy does not set its size or dpi. But you can change it (independently of scrcpy) with:

adb shell wm size …
adb shell wm density …

The --new-display alone whitout --start-app, have some problems, black screen.

Because your system has no default launcher or virtual display (it depends on the device system).

You can start a launcher: https://github.com/Genymobile/scrcpy/blob/master/doc/virtual_display.md#start-app