Re: monochrome/greyscale display

I also tried both -render gray and mono option of X or lauching startx
but no luck..

Dan
bsd.numode.eu


Crystal Kolipe <kolipe.c@exoticsilicon.com> 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.
>