Colors washed out after last update

After one of the recent updates, colors on my laptop became washed out. When i open/close the lid, they became ok (but at max brightness), and problem comes back as soon as i change the brightness.

I think this is the same problem, https://forum.garudalinux.org/t/colors-are-washed-out-since-last-updates/36817 (but I'm using Gnome, not KDE), and switching to X11 does not fix a problem.

Any hints what's causing this?

#archlinux #gnome #kde #wayland

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