I also tried both -render gray and mono option of X or lauching startx but no luck..
Dan bsd.numode.eu Crystal Kolipe <[email protected]> wrote: > 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. >
