Display wrongly reporting as not having HDR support

Support Graphics & Display
1

Good day,
for a couple of days I have been trying to get HDR to work for my setup. First problem I encountered was the missing HDR option in the KDE Plasma settings. After a bit of digging around, I figured out that Kwin shows the Screen as incapable for HDR. Any suggestions would be nice.
Monitor: Asus TUF VG34VQL3A

██████████████████  ████████   phil@Phil-Computer 
██████████████████  ████████   ------------------ 
██████████████████  ████████   OS: Manjaro Linux x86_64 
██████████████████  ████████   Host: X470 AORUS ULTRA GAMING 
████████            ████████   Kernel: 6.6.34-1-MANJARO 
████████  ████████  ████████   Uptime: 19 mins 
████████  ████████  ████████   Packages: 2287 (pacman), 30 (flatpak), 3 (snap) 
████████  ████████  ████████   Shell: bash 5.2.26 
████████  ████████  ████████   Resolution: 3440x1440 
████████  ████████  ████████   DE: Plasma 6.0.5 
████████  ████████  ████████   WM: KWin 
████████  ████████  ████████   Theme: [Plasma], Breeze-Dark [GTK2], Breeze [GTK3] 
████████  ████████  ████████   Icons: [Plasma], breeze [GTK2/3] 
████████  ████████  ████████   Terminal: konsole 
                               CPU: AMD Ryzen 7 5800X (16) @ 3.800GHz 
                               GPU: NVIDIA GeForce RTX 3070 
                               Memory: 5804MiB / 32014MiB 

Output: 1 DP-1
        enabled
        connected
        priority 1
        DisplayPort
        Modes:  0:3440x1440@60!  1:3440x1440@180*  2:3440x1440@165  3:3440x1440@144  4:3440x1440@120  5:3440x1440@100  6:3440x1440@75  7:2560x1080@120  8:2560x1080@60  9:2560x1080@50  10:1920x1200@60  11:1920x1080@120  12:1920x1080@100  13:1920x1080@60  14:1920x1080@60  15:1920x1080@50  16:1600x1200@60  17:1680x1050@60  18:1280x1024@75  19:1280x1024@60  20:1440x900@60  21:1280x960@60  22:1280x800@60  23:1280x720@60  24:1280x720@60  25:1280x720@50  26:1024x768@75  27:1024x768@70  28:1024x768@60  29:800x600@75  30:800x600@72  31:800x600@60  32:800x600@56  33:720x576@50  34:720x480@60  35:640x480@75  36:640x480@73  37:640x480@60  38:640x480@60  39:640x480@60 
        Geometry: 0,0 3440x1440
        Scale: 1
        Rotation: 1
        Overscan: 0
        Vrr: Automatic
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none
2

Hello, I am having the same issue.

I followed all of the steps listed here that I used to get HDR working a few months ago - it has just suddenly stopped working for some reason. My Steam install will also not launch anymore, even after reinstalling it. I wonder is there is a relation.

When I run pamac list | grep nvidia I see:

lib32-nvidia-utils                 550.120-1                    multilib  212.4 MB
linux611-nvidia                    550.120-8                    extra     53.7 MB
linux66-nvidia                     550.120-6                    extra     53.4 MB
mhwd-nvidia                        550.120-1                    extra     1.8 kB
mhwd-nvidia-390xx                  390.157-14                   extra     1.9 kB
mhwd-nvidia-470xx                  470.256.02-4                 extra     1.8 kB
nvidia-settings                    550.120-1                    extra     1.5 MB
nvidia-utils                       550.120-1                    extra     622.9 MB

May I have the commands you used to get the outputs in your post?

Edit: While trying to find the commands you used, I came across this post. My issue seems to be an issue with Plasma 6.2. My version is 6.2.1-1 - hopefully an update will be released shortly. Maybe the Reddit post I linked will be able to help you with your issue though.

3

Hi @trixter just to let you know the OP’s latest post is the one in this thread, so @BlackEye might not see this.

Since your hardware and software environment are different, I suggest starting a new thread. It’s usually best to do so anyway, and then perhaps include a link to the other thread.

The system info the OP posted (the top one, anyway) isn’t really useful; looks like a screenfetch or neofetch output. Not enough detail! :wink:

So in your thread, start by posting the output of inxi -zv8, highlight the text and press the </> (this formats the output making it much easier to read).

I also note that your profile lists “Stable” but you have Plasma6.2? That’s why we need those outputs.

Cheers! :smiley: