> On 15 Oct 2024, at 11:44, Barry Scott <ba...@barrys-emacs.org> wrote:
>
> When I get a moment o investigate I will have a look at EDID and see if there
> is where the HDR
> info if returned from the monitor. I have not looked at that level of details
> yet, so things to learn about.
I think I have found the HDR setting in EDID.
From `kscreen-doctor -o` you can get the name of your output.
Using that name you can get the edid for the screen.
On my desktop I see this (edited for brevity).
The output is named DP-2.
The HDR I think is indicated by the "Bits per primary color channel: 10"
What is the EDID for your monitor report?
Barry
```
+ kscreen-doctor -o
Output: 1 DP-2
enabled
connected
priority 1
DisplayPort
Modes: 1:3840x2160@60*! 2:3840x2160@30 3:2560x1440@60
4:2048x1280@60 5:2048x1152@60 6:1920x1200@60 7:204←
Geometry: 0,0 3072x1728
Scale: 1.25
Rotation: 1
Overscan: 0
Vrr: incapable
RgbRange: unknown
HDR: enabled
...
+ edid-decode /sys/class/drm/card1/card1-DP-2/device/card1-DP-2/edid
...
Block 0, Base EDID:
EDID Structure Version & Revision: 1.4
Vendor & Product Identification:
Manufacturer: DEL
Model: 17011
Serial Number: 1094015308 (0x4135594c)
Made in: week 23 of 2022
Basic Display Parameters & Features:
Digital display
Bits per primary color channel: 10
DisplayPort interface
Maximum image size: 70 cm x 39 cm
Gamma: 2.20
...
```
--
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