Apparently this applies to TVs too old to have CEC. You can fix this problem by adding these configuration in config.txt. gpu_mem=320force_turbo=0hdmi_ignore_edid=0xa5000080disable_overscan=1framebuffer_width=1920framebuffer_height=1080hdmi_force_hotplug=1hdmi_group=1hdmi_mode=16hdmi_ignore_cec=1 #comment this if yours has CECdtparam=audio=ondtoverlay=vc4-fkms-v3dmax_framebuffers=2