Hi, I'm new to Kubuntu.
I've spent several hours trying to solve this problem, but it's difficult to search for it because it's hard to describe.
The problem occurs system-wide in various applications, but it's most visible in images and videos, and behind text.
Sometimes it goes away without me changing any settings (in Firefox, for example) and comes back later (a few minutes). With Kate, the problem persists even though it's gone in Firefox for the moment.
The problem only occurs at 144Hz. If I set it to 60Hz, everything works.
With a color temperature of 6500k, it's barely visible but not gone.
I'm currently using a color temperature of 3600k.
What's interesting is that when I restart my system, I get a color temperature of 6500k.
My current value, however, is set (3600k).
If I move the slider under Night Colors, the current color temperature is immediately reactivated without having to click Apply.
I remember having the same problem in Windows 10 from time to time: the color temperature wasn't applied when restarting, even though it was set. Only after I adjusted the slider.
I never had the graphics errors in Windows 10, though.
I've already tried Wayland and a different Nvidia driver, without success.
But it can't be the monitor, can it? It's an Asus ROG Strix XG27U.
Best regards

I've spent several hours trying to solve this problem, but it's difficult to search for it because it's hard to describe.
The problem occurs system-wide in various applications, but it's most visible in images and videos, and behind text.
Sometimes it goes away without me changing any settings (in Firefox, for example) and comes back later (a few minutes). With Kate, the problem persists even though it's gone in Firefox for the moment.
The problem only occurs at 144Hz. If I set it to 60Hz, everything works.
With a color temperature of 6500k, it's barely visible but not gone.
I'm currently using a color temperature of 3600k.
What's interesting is that when I restart my system, I get a color temperature of 6500k.
My current value, however, is set (3600k).
If I move the slider under Night Colors, the current color temperature is immediately reactivated without having to click Apply.
I remember having the same problem in Windows 10 from time to time: the color temperature wasn't applied when restarting, even though it was set. Only after I adjusted the slider.
I never had the graphics errors in Windows 10, though.
I've already tried Wayland and a different Nvidia driver, without success.
But it can't be the monitor, can it? It's an Asus ROG Strix XG27U.
Best regards
Code:
Version ======= KWin version: 5.27.11 Qt Version: 5.15.13 Qt compile version: 5.15.13 XCB compile version: 1.15 Operation Mode: X11 only Build Options ============= KWIN_BUILD_DECORATIONS: yes KWIN_BUILD_TABBOX: yes KWIN_BUILD_ACTIVITIES: yes HAVE_X11_XCB: yes HAVE_EPOXY_GLX: yes X11 === Vendor: The X.Org Foundation Vendor Release: 12101011 Protocol Version/Revision: 11/0 SHAPE: yes; Version: 0x11 RANDR: yes; Version: 0x14 DAMAGE: yes; Version: 0x11 Composite: yes; Version: 0x4 RENDER: yes; Version: 0xb XFIXES: yes; Version: 0x50 SYNC: yes; Version: 0x31 GLX: yes; Version: 0x0 Decoration ========== Plugin: org.kde.breeze Theme: Plugin recommends border size: None onAllDesktopsAvailable: false alphaChannelSupported: true closeOnDoubleClickOnMenu: false decorationButtonsLeft: 0, 2 decorationButtonsRight: 6, 3, 4, 5 borderSize: 0 gridUnit: 14 font: Noto Sans,10,-1,0,50,0,0,0,0,0 smallSpacing: 3 largeSpacing: 14 Output backend ============== Name: KWin::X11StandaloneBackend Cursor ====== themeName: Breeze_Snow themeSize: 24 Options ======= focusPolicy: 0 xwaylandCrashPolicy: xwaylandMaxCrashCount: 3 nextFocusPrefersMouse: false clickRaise: true autoRaise: false autoRaiseInterval: 0 delayFocusInterval: 0 shadeHover: false shadeHoverInterval: 250 separateScreenFocus: false activeMouseScreen: true placement: activationDesktopPolicy: 0 focusPolicyIsReasonable: true borderSnapZone: 10 windowSnapZone: 10 centerSnapZone: 0 snapOnlyWhenOverlapping: false rollOverDesktops: false focusStealingPreventionLevel: 1 operationTitlebarDblClick: 5000 operationMaxButtonLeftClick: 5000 operationMaxButtonMiddleClick: 5015 operationMaxButtonRightClick: 5014 commandActiveTitlebar1: 0 commandActiveTitlebar2: 28 commandActiveTitlebar3: 2 commandInactiveTitlebar1: 4 commandInactiveTitlebar2: 28 commandInactiveTitlebar3: 2 commandWindow1: 7 commandWindow2: 8 commandWindow3: 8 commandWindowWheel: 28 commandAll1: 10 commandAll2: 3 commandAll3: 14 keyCmdAllModKey: 16777250 condensedTitle: false electricBorderMaximize: true electricBorderTiling: true electricBorderCornerRatio: 0.25 borderlessMaximizedWindows: false killPingTimeout: 5000 hideUtilityWindowsForInactive: true compositingMode: 1 useCompositing: true hiddenPreviews: 1 glSmoothScale: 2 glStrictBinding: false glStrictBindingFollowsDriver: true glPreferBufferSwap: 99 glPlatformInterface: 1 windowsBlockCompositing: true latencyPolicy: renderTimeEstimator: allowTearing: true Screen Edges ============ desktopSwitching: false desktopSwitchingMovingClients: false cursorPushBackDistance: 1x1 timeThreshold: 150 reActivateThreshold: 350 actionTopLeft: 0 actionTop: 0 actionTopRight: 0 actionRight: 0 actionBottomRight: 0 actionBottom: 0 actionBottomLeft: 0 actionLeft: 0 Screens ======= Active screen follows mouse: yes Number of Screens: 1 Screen 0: --------- Name: DP-0 Enabled: 1 Geometry: 0,0,3840x2160 Scale: 1 Refresh Rate: 143999 Adaptive Sync: incapable Compositing =========== Compositing is active Compositing Type: OpenGL OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: NVIDIA GeForce RTX 3080/PCIe/SSE2 OpenGL version string: 3.1.0 NVIDIA 580.95.05 OpenGL platform interface: GLX OpenGL shading language version string: 1.40 NVIDIA via Cg compiler Driver: NVIDIA Driver version: 580.95.5 GPU class: Unknown OpenGL version: 3.1 GLSL version: 1.40 X server version: 1.21.1 Linux kernel version: 6.14 Direct rendering: Requires strict binding: no GLSL shaders: yes Texture NPOT support: yes Virtual Machine: no OpenGL 2 Shaders are used Loaded Effects: --------------- colorpicker outputlocator screenshot screenedge zoom blur contrast kwin4_effect_sessionquit kwin4_effect_logout kwin4_effect_login slidingpopups kwin4_effect_windowaperture slide kwin4_effect_fullscreen kwin4_effect_squash kwin4_effect_maximize kwin4_effect_morphingpopups kwin4_effect_frozenapp kwin4_effect_fadingpopups kwin4_effect_scale kwin4_effect_dialogparent desktopgrid highlightwindow overview tileseditor windowview blendchanges startupfeedback kscreen Currently Active Effects: ------------------------- blur contrast Effect Settings: ---------------- colorpicker: outputlocator: screenshot: screenedge: zoom: zoomFactor: 1.2 mousePointer: 0 mouseTracking: 0 focusTrackingEnabled: false textCaretTrackingEnabled: false focusDelay: 350 moveFactor: 20 targetZoom: 1 blur: contrast: kwin4_effect_sessionquit: pluginId: kwin4_effect_sessionquit isActiveFullScreenEffect: false kwin4_effect_logout: pluginId: kwin4_effect_logout isActiveFullScreenEffect: false kwin4_effect_login: pluginId: kwin4_effect_login isActiveFullScreenEffect: false slidingpopups: slideInDuration: 1 slideOutDuration: 1 kwin4_effect_windowaperture: pluginId: kwin4_effect_windowaperture isActiveFullScreenEffect: false slide: horizontalGap: 45 verticalGap: 20 slideBackground: true kwin4_effect_fullscreen: pluginId: kwin4_effect_fullscreen isActiveFullScreenEffect: false kwin4_effect_squash: pluginId: kwin4_effect_squash isActiveFullScreenEffect: false kwin4_effect_maximize: pluginId: kwin4_effect_maximize isActiveFullScreenEffect: false kwin4_effect_morphingpopups: pluginId: kwin4_effect_morphingpopups isActiveFullScreenEffect: false kwin4_effect_frozenapp: pluginId: kwin4_effect_frozenapp isActiveFullScreenEffect: false kwin4_effect_fadingpopups: pluginId: kwin4_effect_fadingpopups isActiveFullScreenEffect: false kwin4_effect_scale: pluginId: kwin4_effect_scale isActiveFullScreenEffect: false kwin4_effect_dialogparent: pluginId: kwin4_effect_dialogparent isActiveFullScreenEffect: false desktopgrid: activeView: gridRows: 1 gridColumns: 1 animationDuration: 1 layout: 1 partialActivationFactor: 0 gestureInProgress: false showAddRemove: true desktopNameAlignment: 0 desktopLayoutMode: 0 customLayoutRows: 2 highlightwindow: overview: activeView: animationDuration: 1 layout: 1 ignoreMinimized: false blurBackground: true partialActivationFactor: 0 gestureInProgress: false searchText: tileseditor: activeView: animationDuration: 200 windowview: activeView: animationDuration: 1 layout: 1 ignoreMinimized: false mode: 6488165 partialActivationFactor: 0 gestureInProgress: false searchText: blendchanges: startupfeedback: type: 3 kscreen: Loaded Plugins: --------------- kwin5_plugin_krunner kwin5_plugin_nightcolor Available Plugins: ------------------ kwin5_plugin_buttonrebinds kwin5_plugin_colord kwin5_plugin_krunner kwin5_plugin_nightcolor
