On Fri, Feb 20, 2026 at 02:27:45PM -0500, Allan Streib wrote: > I'm interested in enabling a monocrome (greyscale) display mode, for use at > night/in low lighting situations. > > Per some search results, I tried setting saturation with xrandr but got an > error: > > $ xrandr --output DisplayPort-0 --set Saturation 0 > X Error of failed request: BadName (named color or font does not exist) > Major opcode of failed request: 140 (RANDR) > Minor opcode of failed request: 11 (RRQueryOutputProperty) > Serial number of failed request: 38 > Current serial number in output stream: 38 > > Is there a straightforward way to do this globally?
Dmesg? Depending on your graphics hardware, you might be able to run X11 in 8-bit static grey, or some other greyscale visual.
