Created attachment 180626 [details] drm_info output SUMMARY "Night Light" functionality results in really skewed colors on my external display - first towards brown/green, then towards red/purple. STEPS TO REPRODUCE 1. Set up some windows with different shades of gray. 2. Turn on "Night Light" in KDE settings, to some temperature lower than 4000K or so. OBSERVED RESULT As observed, grays and blacks start to really get miscolored when night light comes into play. Up to ~4300K setting or so, they look OK, but then they receive heavy brown/green tinting which then abruptly changes to red/purple tinting. This abruptness is visible both when adjusting the night light temperature to lower level, or between a color gradient shown on a screen - blacks receive the final red/purple tinting much earlier than lighter grays. This can be seen on this video: https://photos.app.goo.gl/K7D1Fauu5FnYRCjB8 Oddly enough, the bad tinting only happens for my external display; laptop's internal display looks fine. EXPECTED RESULT I'd expect the night light to gradually alter the colors of grays without any strange recolorings. ADDITIONAL INFORMATION Possibly related to https://bugs.kde.org/show_bug.cgi?id=500837#c2 ? Attached `drm_info` output.
Please attach the output of kscreen-doctor -o
Created attachment 180634 [details] kscreen-doctor -o output `kscreen-doctor -o` output attached
Created attachment 180635 [details] kscreen-doctor -o output `kscreen-doctor -o` output (now without terminal color escapes junk)
Comment on attachment 180635 [details] kscreen-doctor -o output >Output: 1 eDP-1 This is the laptop's internal display that does not have the discoloration problem. > disabled > connected > priority 0 > Panel > Modes: 1:2560x1600@60! 2:2560x1600@48 3:1600x1200@60 4:1280x1024@60 5:1024x768@60* 6:2560x1600@60 7:1920x1200@60 8:1280x800@60 9:2560x1440@60 10:1920x1080@60 11:1600x900@60 12:1368x768@60 13:1280x720@60 > Geometry: 0,0 707x530 > Scale: 1.45 > Rotation: 1 > Overscan: 0 > Vrr: incapable > RgbRange: Automatic > HDR: incapable > Wide Color Gamut: incapable > ICC profile: none > Color profile source: sRGB > Color power preference: prefer efficiency and performance > Brightness control: supported, set to 25% and dimming to 100% >Output: 2 DP-3 This is the external display with discolored night light. > enabled > connected > priority 1 > DisplayPort > Modes: 14:3840x1600@60! 15:3840x1600@144 16:3840x1600@120 17:3840x1600@100* 18:3840x1600@85 19:1024x768@60 20:800x600@60 21:640x480@60 22:640x480@60 > Geometry: 0,0 3491x1455 > Scale: 1.1 > Rotation: 1 > Overscan: 0 > Vrr: Automatic > RgbRange: Automatic > HDR: disabled > Wide Color Gamut: disabled > ICC profile: none > Color profile source: sRGB > Color power preference: prefer accuracy > Brightness control: supported, set to 100% and dimming to 100% >
> Color power preference: prefer accuracy Does the issue still appear if you set the output to "prefer efficiency" instead?
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🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.