In the User Guide for the U2518D, in Preset Modes, it specifies CVR for native resolution as opposed to VESA timing. What is CVR timing? One of the forms of reduced blanking? Additionally, can any information be secured on what M2T104 firmware fixes? Pending purchase but no go until there is evidence the quirks this model is reported to exhibit have been positively solved.
CVR is short for CVT-R which is the Coordinated Video Timings. Yes, used to reduce blanking.
M2T104 was never released as a downloadable file. You can only get it if you purchase the U2518D new directly from Dell. We have no idea what revision resellers may have in stock. The changes/fixes from M2T103 to M2T104 were not released to us.