Wait, since when does KDE support HDR? Can you have HDR wallpapers?
this post was submitted on 11 Apr 2024
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Since Plasma 6. Not sure about HDR wallpapers (never even heard of an "HDR Wallpaper", so I've not looked into support for it), it should work with fullscreen videos though, and Steam games work if you run it through a nested gamescope session with a special HDR Vulkan layer installed.
I assume it will work for a live system? When Fedora 40 eventually comes out I'll give it a try. I can't stand to daily drive plasma unfortunately. (Gnome works better for me)
Maybe if it works well I'll run plasma on a media machine.
Changing the output config file should work, as long as KWin isn't running while you make the change (in which case the change will just be overridden)
Not an answer, but maybe the KDE folks should add "and may seriously break things" to the "is experimental" warning next to HDR :D
This is why GNOME hasn't implemented it yet, they want to wait until it's perfect and not experimental before adding the feature.
Almost every output setting "may seriously break things" in my experience. Display drivers are sadly quite fragile
Canβt you turn it off on the monitor?
I don't think that is something any HDR monitor can do, unfortunately. They just let you know it's in HDR mode.
HDR for the most part, is a two way feature. must be enabled by driver/de as well as enabled on the monitor for it to in work, because its not always ideal to have local dimming enabled on monitor (one of the key components required for HDR)
Many monitors allow you to turn off HDR, they just claim they don't support it to the computer when you do that
My monitor AW2432DWF does allow you to turn off HDR, although it is a relatively recent monitor and my first HDR one, so I don't know how common that is.
kscreen-doctor -o
Then adjust the below command accordingly :
kscreen-doctor output.1.hdr.disable
Make sure you go open a bug report.
The monitor does not display with kscreen-doctor -o as it's disconnected.
I will create a bug report.
I see you got it fixed.
When you run hw-prope make sure your offending monitor is connected. hw-prope will help identify the monitor by hardware ID which is used in various areas like kernel space and will help with identifying the exact model of the problem monitor hopefully allowing for devs to reproduce the bug in a lab environment.
Added the hw-probe link
Looking through the probe logs, and seeing that your monitor is using EISA bus and works fine without HDR, there doesn't appear to be any issues on the Linux side of things. My guess is that they didn't implement HDR on the monitors side exactly to spec and that's where the problem resides. So, in this sense some monitor specific quirk fixup code is needed on the Linux side of things to get it working properly. If the devs ask any additional steps from you, be sure to do it and provide feedback.