Most of the times the output seems to be a proper 1080p image.
Other times it's shifted by ~50% up so only ~50% of the bottom is visible.
Screen rotation setting doesn't seem to do anything. Kind of hoped it could work in vertical mode.
HDMI Audio output works but all audio can stop for a few seconds by itself, or after spending some time in the RetroArch menu (not sure, it just felt that way).
After removing HDMI cable the main screen will remain dark until a reboot - of not always then at least most of the times.
After removing HDMI cable the audio output setting might need manual touch in order for a device to produce audio again.
In this latest version the HDMI works but only shows on the screen a third or less of the image. With the previous versions it did not happen