So today I clicked ‘enable HDR’ on one of my monitors and something broke. The whole system froze up and the HDR monitor went black. If I reboot it freezes right after I login.
If I unplug that monitor or start in X11 instead of Wayland then everything is fine. Plugging the HDR monitor in while I’m logged into a Wayland session also freezes everything.
How can I disable the HDR setting?
The monitor doesn’t show in System Settings whilst its unplugged so I’m hoping theirs some way to fix it on the CLI.
The only place I’ve found HDR referenced is .config/kwinoutputconfig.json. I set HDR to false but after reboot it’s set to true again.
I also tried deleting .config/kwinrc and .local/share/kscreen but no luck.
I’m fine with just resetting all Display settings if that’s required.
----- UPDATE ------
Bug report filed here: https://bugs.kde.org/show_bug.cgi?id=485403
Fixed by
- Ctrl + Alt + F3 to go into terminal
- Set
HighDynamicRangeandWideColorGamutto false in ~/.config/kwinoutputconfig.json - Execute
plasmashell --replace - Reboot, Login, Reattach HDR Monitor
------ UPDATE ------
After updating and trying again today the steps above no longer worked.
You still need to change ~/.config/kwinoutputconfig.json but plasmashell --replace no longer works for me.
Running killall kwin_wayland also just bumps me from my terminal back into the desktop. kwin can’t be running when you change that file or it will be overridden.
I booted into a separate Linux Live USB and change the files that way.
Thank you everyone for your help 🎉
Not an answer, but maybe the KDE folks should add “and may seriously break things” to the “is experimental” warning next to HDR :D
Almost every output setting “may seriously break things” in my experience. Display drivers are sadly quite fragile
This is why GNOME hasn’t implemented it yet, they want to wait until it’s perfect and not experimental before adding the feature.