Re: monochrome/greyscale display

Yes we had someone on IRC a while back (like at least 5 years ago) who
was complaining of this, grayscale doesn't work anymore in xenocara, and
that may be the case in regular Xorg too. I guess we have zero users who
use this mode?

Cheers,

Noth

On 20/02/2026 21:29, dan wrote:
> 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.
>>

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.
>