Gamma keeps reseting to 1.00 (KGamma)

[Edward78]

I am in X set the gamma to .40, iy resets mainly after reboot, why?

[Ben]

X and Wayland reload defaults on reboot unless your settings are stored in a permanent config.

An alternative would be to set your active monitors gamma after your reboot:

xrandr --output "$(xrandr --listmonitors | awk '/\*/{print $NF}')" --gamma 0.40:0.40:0.40

Save that and rename it set-gamma-0.4

chmod +x set-gamma-0.4

Now move that somewhere in your $PATH

mv set-gamma-0.4 ~/.local/bin

System Settings

Startup and Shutdown Autostart Add Script select by navigating to ~/.local/bin and find set-gamma-0.4

[Edward78]

Thabks, wjen will we beable to set gamma & contrast in Wayland?

[scotty65]

kgamma2 is a Wayland-replacement for kgamma:

Wayland pain points – kgamma – David Edmundson's Web Log

The new tool

I have made a simple tool that edits the relevant part of an ICC profile - VCGTs.

“VCGT (Video Card Gamma Table): An optional, private tag inside an ICC file that stores 1D grayscale/gamma curves loaded directly into your graphics card’s hardware Look-Up Table (LUT).”

That’s a lot of fancy terms, but the key point is it’s a tiny subset of the thing Kwin already supports. We can add a UI around those few values and not need to add a second code path in kwin or kscreen.

The UX is deliberately similar to the old UI.
Obviously it needs a round of polish (volunteers welcome!), but it’s functional. (article continues)

It is still in its development stage, but it can be installed from the AUR if you want to test it:

AUR (en) - kgamma2-git

pamac info kgamma2-git

❯ pamac info kgamma2-git
Name : kgamma2-git
Version : r17.beaa5f2885-1
Description : Adjust your monitor gamma settings in a Wayland session
URL : https://invent.kde.org/davidedmundson/kgamma2
Licenses : LGPL-2.1-or-later
Repository : AUR
Groups : --
Depends On : ki18n lcms2 libkscreen qt6-base qt6-declarative
Optional Dependencies : --
Make Dependencies : git cmake extra-cmake-modules kirigami
Check Dependencies : --
Provides : --
Replaces : kgamma2
Conflicts With : kgamma2
Maintainer : C0rn3j
First Submitted : Thu 13 Aug 2026 21:29:37
Last Modified : Thu 13 Aug 2026 21:29:37
Votes : 0
Out of Date : --

The Git page:

David Edmundson / kgamma2 · GitLab

[Edward78]

@scotty65 Sorry, accidentaly flagged your post Can’t unflag, no harm meant, is Kgamma 2 out of beta/

[scotty65]

@Edward78

is Kgamma 2 out of beta

As I mentioned, it is still in development phase, but it does work (according to the developer). You would be best served by reading the article posted by the developer that I linked to in my post - that explains everything.

Something to also note (from the same article):

My intention is to post it as a standalone application on Flathub and not as part of Plasma. I think that strikes the right balance of providing support without holding ourselves back longterm.

So, it will likely have to be explicitly installed by users. It won’t just arrive one day in a Plasma update.

[BG405]

@Edward78

Sorry, accidentaly flagged your post Can’t unflag, no harm meant

As a bit of reassurance, I never saw a flag & there isn’t a record of one, so no harm done either.

[Aragorn]

@BG405

I never saw a flag & there isn’t a record of one

Maybe it was a pirate flag.

[Edward78]

@Aragorn

Maybe it was a pirate flag.

RRRRR, you salty dog…

So, it will likely have to be explicitly installed by users. It won’t just arrive one day in a Plasma update.

[Aragorn]

@Edward78

RRRRR, you salty dog…

+ =

[soundofthunder]

+ =

The hotdog might be a Bicky burger sideways, you never know.