u/MrTyperoi

I just found out that GNOME 50.4 has a sdr-native color mode, but for some reason it's not exposed in GNOME Settings.

I had to use gdctl

I'm running Fedora 44 GNOME on an ASUS Vivobook S14 with the 14" 2880×1800 120Hz OLED panel (SDC 0x419d). It's a wide-gamut / DCI-P3 panel.

I switched it to sdr-native, rebooted, and it actually stayed enabled.

I wasn't even aware this existed until now. Kind of weird that GNOME Settings doesn't give you an option for it and you have to dig into gdctl.

Anyone else using sdr-native on a wide-gamut OLED?

I'm trying to get HDR working on my ASUS Vivobook S 14 OLED (M5406WA-DH71-CB) running Fedora 44 KDE, but since upgrading to Plasma 6.7 I can no longer enable it.

Hardware:

• ASUS Vivobook S 14 OLED M5406WA-DH71-CB
• AMD Ryzen AI 9 365
• AMD Radeon 880M
• 14" OLED panel 2880×1800 @ 120 Hz
• VESA DisplayHDR True Black 600 certified
• 600 nits HDR peak brightness
• 1.07 billion colors (10-bit)
• 100% DCI-P3

Software

• Fedora 44 KDE
• KDE Plasma 6.7
• Wayland
• Linux kernel 7.0.12-201.fc44
• Mesa 26.0.8

The issue

The laptop panel clearly supports HDR according to ASUS specifications, but KDE does not show any HDR option in Display Settings.

Before Plasma 6.7, I was able to force HDR support by adding:

KWIN_FORCE_ASSUME_HDR_SUPPORT=1

to

./etc/environment

Source : Bug 499673 - KDE and Similar hardware and issue but old KDE Plasma,

After upgrading to Plasma 6.7, that workaround no longer appears to do anything. HDR still does not appear as an available option.

What I've checked

• Running a Wayland session
• Variable is set in /etc/environment
• Rebooted multiple times
• System fully updated AMDGPU driver in use
• No external display connected

Questions

Has anyone with an ASUS OLED laptop experienced the same issue on Plasma 6.7?

Did KWin 6.7 change the way KWIN_FORCE_ASSUME_HDR_SUPPORT=1 works?

Is there a new method to force-enable HDR on internal OLED panels?

Could this be a regression in Plasma, KWin, or Fedora's packaging?

Any ideas, logs to collect, or troubleshooting steps would be appreciated.

Thanks!

EDIT1 : Yes I did use AI to write the post to make the issue as clear as possible and will provide soon my

kscreen-doctor :

Output: 1 eDP-1 14e66776-595c-4f8a-b4c3-0ea3304cd527 
enabled 
connected 
priority 1
Panel replication source:0
Modes: 1:2880x1800@120.00*! 2:2880x1800@60.00 3:1920x1200@120.00 4:1920x1080@120.00 5:1600x1200@120.00 6:1680x1050@120.00 7:1280x1024@120.00 8:1440x900@120.00 9:1280x800@120.00 10:1280x720@120.00 11:1024x768@120.00 12:800x600@120.00 13:640x480@120.00 14:1600x1200@59.87 15:1280x1024@59.90 16:1024x768@59.92 17:2560x1600@59.99 18:2560x1600@119.93 19:1920x1200@59.88 20:1280x800@59.81 21:2880x1620@59.96 22:2880x1620@119.95 23:2560x1440@59.96 24:2560x1440@119.95 25:1920x1080@59.96 26:1600x900@59.95 27:1600x900@119.95 28:1368x768@59.88 29:1368x768@119.83 30:1280x720@59.85 
Custom modes: None 
Geometry: 0,0 1800x1125 
Scale: 1.6 
Rotation: 1 
Overscan: 0 
Vrr: Automatic 
RgbRange: unknown 
HDR: incapable 
Wide Color Gamut: incapable 
ICC profile: /home/USERNAME/Documents/Asus-Vivobook-S14-M5406WA-ICC-profiles-main/M5406WA_1002_834C419D_CMDEF.icm 
Color profile source: EDID 
Color power preference: prefer accuracy 
Brightness control: supported, set to 100% and dimming to 100% 
Color resolution: automatic (16), range: [8; 16] bits per color 
Allow EDR: always 
Sharpness control: unsupported 
Automatic brightness: unsupported