For some reason while using KDE nightcolor option does not auto-start. If ienable it manually sometimes it will flicker and then work. I had once redshift installed and it might have messed some config I really don´t know.
Relevant info:
inxi -Fxz System: Kernel: 5.10.30-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.0 Desktop: KDE Plasma 5.21.4 Distro: Manjaro Linux base: Arch Linux Machine: Type: Desktop Mobo: Micro-Star model: Z390-A PRO (MS-7B98) v: 1.0 serial: <filter> UEFI: American Megatrends v: 1.80 date: 12/25/2019 CPU: Info: 6-Core model: Intel Core i5-9600K bits: 64 type: MCP arch: Kaby Lake note: check rev: C cache: L2: 9 MiB flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 44398 Speed: 800 MHz min/max: 800/4700 MHz Core speeds (MHz): 1: 800 2: 800 3: 800 4: 800 5: 800 6: 800 Graphics: Device-1: NVIDIA vendor: eVga.com. driver: nvidia v: 460.67 bus-ID: 01:00.0 Device-2: Logitech Logitech Webcam C925e type: USB driver: snd-usb-audio,uvcvideo bus-ID: 1-1.2:8 Display: x11 server: X.Org 1.20.11 driver: loaded: nvidia resolution: 1920x1080 OpenGL: renderer: GeForce RTX 3060/PCIe/SSE2 v: 4.6.0 NVIDIA 460.67 direct render: Yes Audio: Device-1: Intel Cannon Lake PCH cAVS vendor: Micro-Star MSI driver: snd_hda_intel v: kernel bus-ID: 00:1f.3 Device-2: NVIDIA vendor: eVga.com. driver: snd_hda_intel v: kernel bus-ID: 01:00.1 Device-3: Logitech Logitech Webcam C925e type: USB driver: snd-usb-audio,uvcvideo bus-ID: 1-1.2:8 Sound Server-1: ALSA v: k5.10.30-1-MANJARO running: yes Sound Server-2: JACK v: 1.9.17 running: no Sound Server-3: PulseAudio v: 14.2 running: yes Sound Server-4: PipeWire v: 0.3.25 running: no Network: Device-1: Intel Ethernet I219-V vendor: Micro-Star MSI driver: e1000e v: kernel port: efa0 bus-ID: 00:1f.6 IF: eno1 state: up speed: 1000 Mbps duplex: full mac: <filter> IF-ID-1: br-232fd21ea23b state: down mac: <filter> IF-ID-2: br-5d01cbb2628b state: down mac: <filter> IF-ID-3: docker0 state: down mac: <filter> Bluetooth: Device-1: Cambridge Silicon Radio Bluetooth Dongle (HCI mode) type: USB driver: btusb v: 0.8 bus-ID: 1-1.3:7 Report: bt-adapter ID: hci0 rfk-id: 0 state: up address: <filter> Drives: Local Storage: total: 1.33 TiB used: 222.26 GiB (16.3%) ID-1: /dev/sda vendor: A-Data model: SU630 size: 447.13 GiB ID-2: /dev/sdb vendor: Samsung model: SSD 840 EVO 500GB size: 465.76 GiB ID-3: /dev/sdc vendor: Kingston model: SA400S37480G size: 447.13 GiB Partition: ID-1: / size: 290.65 GiB used: 214.35 GiB (73.7%) fs: ext4 dev: /dev/sdc1 ID-2: /boot/efi size: 96 MiB used: 35.3 MiB (36.7%) fs: vfat dev: /dev/sdb2 Swap: ID-1: swap-1 type: file size: 4 GiB used: 0 KiB (0.0%) file: /swapfile Sensors: System Temperatures: cpu: 38.0 C mobo: N/A gpu: nvidia temp: 51 C Fan Speeds (RPM): N/A gpu: nvidia fan: 0% Info: Processes: 251 Uptime: 17m Memory: 15.57 GiB used: 5.78 GiB (37.1%) Init: systemd Compilers: gcc: 10.2.0 Packages: 1697 Shell: Bash v: 5.1.0 inxi: 3.3.04