Blank monitor arter login armbian ubuntu cinnamon

[Anang Wahyudi]

I've installed Armbian Ubuntu Nobble Cinnamon on sdcard with Polytron PDB F1 and it's chipset amlogic S912

After login with lightdm, my screen turn black, What I should do?

[Werner]

moved to tvboxes

[SteeMan]

What exactly have you installed on the SD card (version, image name), and what steps have you used to install?

[mvftrexc eartuih]

I also installed armbian Armbian_community_25.11.0-trunk.273_Aml-s9xx-box_noble_current_6.12.49_cinnamon_desktop.img.xz di s905x tv box, installed on SD memory card, installation went smoothly, creating username and password was completed, after that load desktop enviroment and dark. no hdmi signal, then i turn it off and on again it can start and load to the password entry screen, and after i enter the password and press enter button, it loads then goes dark no signal Again 

[SteeMan]

Is your monitor a standard 1080p resolution or something else?  If you try a server build that doesn't load a graphical interface does it work?  Have you tried something more standard like gnome instead of cinnamon?