>> From ../src/add-ons/accelerants/common/create_display_modes.cpp >> I can see that my VDUs' resolutions are not supported in that code, >> and furthermore the ratios differ to the hardcoded modes which appear >> to be established timings. In practice my Haiku display setting allows >> only 1024x600 and this is not supported in the cited code. > > The modes should be read using EDID or DDC or similar protocols from your > monitor itself. > I realise that and I am seeking the code responsible for the EDID queries because something is going wrong and the output on my VDU is not usable.