Very dark picture when streaming HDR using sunshine

Help
,
1

I just upgrade to the new 6.2 version (using Fedora 40).
It seems that most things work really nicely, however when I attempt to stream from my HDR enabled monitor to another HDR enabled monitor (using sunshine and moonlight - with HDR enabled) the picture is extremely dark.
I checked some basic things (but I’m not really sure how to debug the HDR parts) and it seems to look good on the host side (that is running KDE 6.2):

$ sudo cat /sys/kernel/debug/dri/1/crtc-0/amdgpu_current_colorspace
BT2020_RGB
$ sudo  cat /sys/kernel/debug/dri/1/crtc-0/amdgpu_current_bpc
Current: 10
$ drm_info | rg -i hdr
│   │       ├───"HDR_OUTPUT_METADATA": blob = 0
│   │       ├───"HDR_OUTPUT_METADATA": blob = 154
│   │       ├───"HDR_OUTPUT_METADATA": blob = 0
│   │       ├───"HDR_OUTPUT_METADATA": blob = 0

On the client-side it’s just using the current Moonlight release from flathub & is running on SteamDeck that has HDR support in the gamemode session.
This used to work without issues using KDE 6.1, so I assume the new release has changed something around HDR?

I took a screenshot on the streaming client to show how dark it is (I wanted to post a comparison from the host, but I can’t attach 2 screenshots unfortunately):

client_screen
client_screen1920×1080 43.7 KB

Maybe someone else is experiencing this issue as well (even though it is very niche).

Cheers!

1 Like
2

This is happening to me as well. Everything worked as it should before. Unfortunately, I haven’t found a solution yet but figured I’d chime in.

3

Hi - are both of you using Plasma 6.2.4? It sounds like what you’re experiencing might be the following bug: 496185 – When using HDR, Pipewire screenshots/recordings are dim , but if you’re on 6.2.4 and the issue persists, it may be a different issue?