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.
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