Bug#1120275: HDR maximum brightness low after reboot, only restored by turning HDR off, turning up brightness, and turning HDR back on

[Josh Triplett]

On Thu, 06 Nov 2025 12:51:50 -0800 Josh Triplett <josh at joshtriplett.org> wrote:
> After upgrading to latest unstable, the maximum brightness of my display
> was very dim; turning it up all the way resulted in a total brightness
> somewhere around 30-50% of what it was before.
> 
> I was only able to fix this by turning HDR off in the Display settings,
> then turning the brightness up, then turning HDR back on, then turning
> the brightness up.

Followup: this happens on every boot.