When running aosp build for aosp_x86-eng combo in emulator via android studio on windows it just stuck with black screen. How to debug this?

[Agry Gami]

I run following sequence of commands to build android image on my remote ubuntu machine:

> repo init -u https://android.googlesource.com/platform/manifest -b android-10.0.0_r33
...
> repo sync
...
> . build/envsetup.sh
> lunch
... selected "aosp_x86-eng" which was 23
> make -j4
... build succeed

Then I moved all image files from out directory to my windows machine and replace those that are in android sdk under `sdk\system-images\android-29\default\x86\`, there are two system.img and system-qemy.img files produced from build and system-qemu.img has same size as system.img in sdk directory, so I assume I need to use this, though I've tried all combinations (replacing all img file, only system.img) - nothing worked.

To run this image in emulator via android studio I've created new virtual device for Android 10 (i.e. without google-apis) and when started - it stuck in black screen. When I use original image from sdk - everything works. From build.prop files that lay around in sdk directory I see that it was built using "userdebug" mode, but there is no such combo option, only "-eng" is available.

How can I understand why this image doesn't work? It looks totally fine from all perspectives (except userdebug vs eng maybe). Or how can I build "userdebug" version of "aosp_x86" combo?