[RK3399-T] Graphical artifact on desktop environment

[johnefer]

I'm getting this weird graphical artifact on a Radxa Rock 4SE connected to a TV via HDMI. It covers roughly a third of the right side of the display, note that the terminal window is covered by the artifact but the cursor is above it.

I started from a Debian minimal image and added the desktop environment via armbian-config.

The artifact is visible on both GNOME and KDE Plasma (with fully updated system on both rolling and stable) but not with XFCE. It also disappears with resolutions lower than 4K or switching to tty.

Any idea what might be causing this?

 

 

 

[eselarm]

Providing logs with 

armbianmonitor -u

 helps with troubleshooting and significantly raises chances that issue gets addressed.