KDE

5287 readers

178 users here now

KDE is an international technology team creating user-friendly free and open source software for desktop and portable computing. KDE’s software runs on GNU/Linux, BSD and other operating systems, including Windows.

Plasma 6 Bugs

If you encounter a bug, proceed to https://bugs.kde.org, check whether it has been reported.

If it hasn't, report it yourself.

PLEASE THINK CAREFULLY BEFORE POSTING HERE.

Developers do not look for reports on social media, so they will not see it and all it does is clutter up the feed.

founded 1 year ago

MODERATORS

[email protected]

How do I disable HDR? (lemmy.ml)

submitted 7 months ago* (last edited 6 months ago) by [email protected] to c/[email protected]

20 comments fedilink hide all child comments

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 HighDynamicRange and WideColorGamut to 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 🎉

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 32 points 7 months ago* (last edited 7 months ago) (6 children)

kscreen-doctor -o
Then adjust the below command accordingly :
kscreen-doctor output.1.hdr.disable

Make sure you go open a bug report.
When you do, you can use hw-probe and run :
sudo -E hw-probe -all -upload -dump-acpi -decode-acpi
And use the given link in your BR.

[–] [email protected] 2 points 6 months ago (5 children)

The monitor does not display with kscreen-doctor -o as it's disconnected.

I will create a bug report.

[–] [email protected] 3 points 6 months ago* (last edited 6 months ago) (4 children)

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.

load more comments (3 replies)