It happens when I have a custom aspect ratio set, or when I use the menu to set one. I haven't checked if there are other settings that cause problems. I use HDMI. Here are the settings that I think may be relevant:
Code: Select all
forced_scandoubler=0
vga_scaler=1
vscale_mode=0
video_mode=8
custom_aspect_ratio_1=172:135
custom_aspect_ratio_2=86:71