samsung.com/…/about-49-inch-odyssey-oled-g9-displ… (Samsung Taiwan, 49-inch Odyssey OLED G9) Under the no-picture item it says to check whether the PC supports standard DP 1.4, and if it doesn’t, to set Menu > System > DisplayPort Ver. to 1.2 or 1.1 and reconnect the cable. The menus are probably different between the Neo and OLED models. Your ‘-1’ comes from the Intel driver, where modeset is an integer and -1 means the driver default. OP has an RTX 5070 Ti, and ‘nvidia_drm’ modeset is a boolean, so ‘/sys/module/nvidia_drm/parameters/modeset’ reads ‘Y’ or ‘N’. Files under ‘/sys/module/*/parameters’ show the value the loaded module is running with.