Kde nightlight forces (me) to use color accuracy instead of color efficiency

Support KDE Plasma
1

Hi Manjaro,
if I want to have a usable night light, meaning:
a) working progessively with temperature slider
b) working as expected regardless of display luminosity

I’m forced to use “prefer color accuracy” in display setting. If I use “prefer efficency” what I get is a sort “step” behaviour as in:

  1. change in kelvin temperature has no effect, until I reach super “warm” setting, say 2000K. Until say 2100k no change appears, then suddenly the color turns super “warm” (unusable)
  2. If I increase display luminosity say to 70% the above behaviour happens in higher (colder color) kelvin, like 2600k

Thx

inxi:

Kernel: 6.18.39-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 16.1.1
    clocksource: tsc avail: hpet,acpi_pm
    parameters: root=UUID=dcd2885d-ae78-4f92-b3e7-c8507caef8a3 rw quiet
    splash udev.log_priority=3 initrd=boot\initramfs-6.18-x86_64.img
  Desktop: KDE Plasma v: 6.7.3 tk: Qt v: N/A info: frameworks v: 6.28.0
    wm: kwin_wayland vt: 2 dm: N/A Distro: Manjaro base: Arch Linux
Machine:
  Type: Desktop System: Apple product: iMac12,1 v: 1.0
    serial: <superuser required> Chassis: type: 13 v: Mac-942B5BF58194151B
    serial: <superuser required>
  Mobo: Apple model: Mac-942B5BF58194151B serial: <superuser required>
    uuid: <superuser required> Firmware: UEFI vendor: Apple v: 87.0.0.0.0
    date: 06/14/2019
Battery:
  Message: No system battery data found. Is one present?
Memory:
  System RAM: total: 12 GiB available: 11.65 GiB used: 3.71 GiB (31.8%)
  Message: For most reliable report, use superuser + dmidecode.
  Array-1: capacity: 16 GiB slots: 4 modules: 4 EC: None
    max-module-size: 4 GiB note: est.
  Device-1: DIMM0 type: DDR3 detail: synchronous size: 2 GiB
    speed: 1333 MT/s volts: N/A width: N/A manufacturer: 0x02FE
    part-no: 0x45424A3231554538424655302D444A2D4620 serial: <filter>
  Device-2: DIMM0 type: DDR3 detail: synchronous size: 2 GiB
    speed: 1333 MT/s volts: N/A width: N/A manufacturer: 0x02FE
    part-no: 0x45424A3231554538424655302D444A2D4620 serial: <filter>
  Device-3: DIMM1 type: DDR3 detail: synchronous size: 4 GiB
    speed: 1333 MT/s volts: N/A width: N/A manufacturer: 0x80CE
    part-no: 0x4D34373142353237334348302D4348392020 serial: <filter>
  Device-4: DIMM1 type: DDR3 detail: synchronous size: 4 GiB
    speed: 1333 MT/s volts: N/A width: N/A manufacturer: 0x80CE
    part-no: 0x4D34373142353237334348302D4348392020 serial: <filter>
PCI Slots:
  Permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: model: Intel Core i5-2400S bits: 64 type: MCP arch: Sandy Bridge
    gen: core 2 level: v2 built: 2010-12 process: Intel 32nm family: 6
    model-id: 0x2A (42) stepping: 7 microcode: 0x2F
  Topology: cpus: 1x dies: 1 clusters: 4 cores: 4 smt: <unsupported> cache:
    L1: 256 KiB desc: d-4x32 KiB; i-4x32 KiB L2: 1024 KiB desc: 4x256 KiB
    L3: 6 MiB desc: 1x6 MiB
  Speed (MHz): avg: 1600 min/max: 1600/3300 scaling: driver: intel_cpufreq
    governor: schedutil cores: 1: 1600 2: 1600 3: 1600 4: 1600 bogomips: 20000
  Flags: acpi aes aperfmperf apic arat arch_perfmon avx bts clflush cmov
    constant_tsc cpuid cx16 cx8 de ds_cpl dtes64 dtherm dts ept est
    flexpriority flush_l1d fpu fxsr ht ibpb ibrs ida lahf_lm lm mca mce
    md_clear mmx monitor msr mtrr nonstop_tsc nopl nx pae pat pbe pcid
    pclmulqdq pdcm pebs pge pln pni popcnt pse pse36 pti pts rdtscp rep_good
    sep smx ssbd sse sse2 sse4_1 sse4_2 ssse3 stibp syscall tm tm2 tpr_shadow
    tsc tsc_deadline_timer vme vmx vnmi vpid x2apic xsave xsaveopt xtopology
    xtpr
  Vulnerabilities:
  Type: gather_data_sampling status: Not affected
  Type: ghostwrite status: Not affected
  Type: indirect_target_selection status: Not affected
  Type: itlb_multihit status: KVM: Split huge pages
  Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT
    disabled
  Type: mds mitigation: Clear CPU buffers; SMT disabled
  Type: meltdown mitigation: PTI
  Type: mmio_stale_data status: Not affected
  Type: old_microcode status: Not affected
  Type: reg_file_data_sampling status: Not affected
  Type: retbleed status: Not affected
  Type: spec_rstack_overflow status: Not affected
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
    prctl
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
    sanitization
  Type: spectre_v2 mitigation: Retpolines; IBPB: conditional; IBRS_FW;
    STIBP: disabled; RSB filling; PBRSB-eIBRS: Not affected; BHI: Not
    affected
  Type: srbds status: Not affected
  Type: tsa status: Not affected
  Type: tsx_async_abort status: Not affected
  Type: vmscape mitigation: IBPB before exit to userspace
Graphics:
  Device-1: Intel 2nd Generation Core Processor Family Integrated Graphics
    driver: i915 v: kernel arch: Gen-6 code: Sandybridge process: Intel 32nm
    built: 2011 ports: active: none empty: VGA-1 bus-ID: 00:02.0
    chip-ID: 8086:0102 class-ID: 0380
  Device-2: Advanced Micro Devices [AMD/ATI] Whistler [Radeon HD
    6630M/6650M/6750M/7670M/7690M] vendor: Apple driver: radeon v: kernel
    alternate: amdgpu arch: TeraScale-2 code: Evergreen process: TSMC 32-40nm
    built: 2009-15 pcie: gen: 1 speed: 2.5 GT/s lanes: 16 ports: active: eDP-1
    empty: DP-1, DP-2, DP-3, VGA-2 bus-ID: 01:00.0 chip-ID: 1002:6741
    class-ID: 0300
  Device-3: Apple FaceTime HD Camera (Built-in) driver: uvcvideo type: USB
    rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 3-2:3 chip-ID: 05ac:850b
    class-ID: 0e02 serial: <filter>
  Display: wayland server: X.org v: 1.21.1.24 with: Xwayland v: 24.1.13
    compositor: kwin_wayland driver: X: loaded: modesetting,radeon
    alternate: fbdev,vesa dri: r600,crocus gpu: radeon display-ID: 0
  Monitor-1: eDP-1 model: Apple iMac built: 2010 res: mode: 1920x1080 hz: 60
    scale: 100% (1) dpi: 103 gamma: 1.2 chroma: red: x: 0.655 y: 0.333 green:
    x: 0.298 y: 0.620 blue: x: 0.145 y: 0.047 white: x: 0.314 y: 0.329
    size: 475x267mm (18.7x10.51") diag: 545mm (21.5") ratio: 16:9
    modes: 1920x1080
  API: EGL v: 1.5 hw: drv: intel crocus drv: amd r600 platforms: device: 0
    drv: r600 device: 1 drv: crocus device: 2 drv: swrast gbm: drv: kms_swrast
    surfaceless: drv: r600 wayland: drv: r600 x11: drv: r600
  API: OpenGL v: 4.6 compat-v: 3.3 vendor: mesa v: 26.1.5-arch1.1 glx-v: 1.4
    direct-render: yes renderer: AMD TURKS (DRM 2.51.0 / 6.18.39-1-MANJARO)
    device-ID: 1002:6741 memory: 500 MiB unified: no display-ID: :0.0
  API: Vulkan Message: No Vulkan data available.
  Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
    de: kscreen-console,kscreen-doctor gpu: radeontop wl: wayland-info
    x11: xdpyinfo, xprop, xrandr
Audio:
  Device-1: Intel 6 Series/C200 Series Family High Definition Audio
    driver: snd_hda_intel v: kernel bus-ID: 00:1b.0 chip-ID: 8086:1c20
    class-ID: 0403
  Device-2: Advanced Micro Devices [AMD/ATI] Turks HDMI Audio [Radeon HD
    6500/6600 / 6700M Series] vendor: Apple driver: snd_hda_intel v: kernel
    pcie: gen: 1 speed: 2.5 GT/s lanes: 16 bus-ID: 01:00.1 chip-ID: 1002:aa90
    class-ID: 0403
  API: ALSA v: k6.18.39-1-MANJARO status: kernel-api tools: N/A
  Server-1: sndiod v: N/A status: off tools: aucat,midicat,sndioctl
  Server-2: JACK v: 1.9.22 status: off tools: N/A
  Server-3: PipeWire v: 1.6.8 status: active with: 1: pipewire-pulse
    status: active 2: wireplumber status: active 3: pipewire-alsa type: plugin
    tools: pactl,pw-cat,pw-cli,wpctl
Network:
  Device-1: Broadcom NetXtreme BCM57765 Gigabit Ethernet PCIe driver: tg3
    v: kernel pcie: gen: 1 speed: 2.5 GT/s lanes: 1 port: N/A bus-ID: 02:00.0
    chip-ID: 14e4:16b4 class-ID: 0200
  IF: enp2s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
  IP v4: <filter> type: dynamic noprefixroute scope: global
    broadcast: <filter>
  IP v6: <filter> type: dynamic noprefixroute scope: global
  IP v6: <filter> type: noprefixroute scope: link
  Device-2: Qualcomm Atheros AR93xx Wireless Network Adapter
    vendor: Apple AirPort Extreme driver: ath9k v: kernel pcie: gen: 1
    speed: 2.5 GT/s lanes: 1 bus-ID: 03:00.0 chip-ID: 168c:0030 class-ID: 0280
  IF: wlp3s0 state: down mac: <filter>
  IF-ID-1: wg0-mullvad state: unknown speed: N/A duplex: N/A mac: N/A
  IP v4: <filter> scope: global
  Info: services: NetworkManager,systemd-timesyncd
  WAN IP: <filter>
Bluetooth:
  Device-1: Apple Built-in Bluetooth 2.0+EDR HCI driver: btusb v: 0.8
    type: USB rev: 2.0 speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 3-1.1.1:6
    chip-ID: 05ac:8215 class-ID: fe01 serial: <filter>
  Report: rfkill ID: hci0 rfk-id: 0 state: down bt-service: enabled,running
    rfk-block: hardware: no software: yes address: see --recommends
Logical:
  Message: No logical block device data found.
  Device-1: luks_home maj-min: 253:0 type: LUKS dm: dm-0 size: 273.36 GiB
  Components:
  p-1: sda8 maj-min: 8:8 size: 273.37 GiB
  Device-2: luks2_Media maj-min: 253:1 type: LUKS dm: dm-1 size: 1.3 TiB
  Components:
  p-1: sdb1 maj-min: 8:17 size: 1.3 TiB
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 2.27 TiB used: 988.12 GiB (42.4%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/sda maj-min: 8:0 vendor: Seagate model: ST3500418AS
    size: 465.76 GiB block-size: physical: 512 B logical: 512 B speed: 3.0 Gb/s
    tech: HDD rpm: 7200 serial: <filter> fw-rev: AP2A scheme: GPT
  ID-2: /dev/sdb maj-min: 8:16 vendor: Samsung model: ST2000LM003 HN-M201RAD
    size: 1.82 TiB block-size: physical: 4096 B logical: 512 B type: USB
    rev: 2.1 spd: 480 Mb/s lanes: 1 mode: 2.0 tech: HDD rpm: 5400
    serial: <filter> fw-rev: 1153 scheme: GPT
  Optical-1: /dev/sr0 vendor: HL-DT-ST model: DVDRW GA32N rev: KE06
    dev-links: cdrom
  Features: speed: 24 multisession: yes audio: yes dvd: yes
    rw: cd-r,cd-rw,dvd-r state: running
Partition:
  ID-1: / raw-size: 48.83 GiB size: 47.76 GiB (97.81%) used: 28.29 GiB (59.2%)
    fs: ext4 dev: /dev/sda4 maj-min: 8:4 label: Manjaro
    uuid: dcd2885d-ae78-4f92-b3e7-c8507caef8a3
  ID-2: /boot/efi raw-size: 200 MiB size: 196.9 MiB (98.44%)
    used: 34.6 MiB (17.6%) fs: vfat dev: /dev/sda1 maj-min: 8:1 label: EFI
    uuid: 2860-11F4
  ID-3: /home raw-size: 273.36 GiB size: 268.89 GiB (98.36%)
    used: 145.37 GiB (54.1%) fs: ext4 dev: /dev/dm-0 maj-min: 253:0
    mapped: luks_home label: N/A uuid: N/A
  ID-4: /run/media/redmanjaro/Media raw-size: 1.3 TiB
    size: 1.27 TiB (98.35%) used: 814.42 GiB (62.4%) fs: ext4 dev: /dev/dm-1
    maj-min: 253:1 mapped: luks2_Media label: N/A uuid: N/A
Swap:
  Alert: No swap data was found.
Unmounted:
  ID-1: /dev/sda2 maj-min: 8:2 size: 93.94 GiB fs: cs_fvault2 label: N/A
    uuid: 87aeccd7-cb94-4f39-98bb-942c9cfaa3c9
  ID-2: /dev/sda3 maj-min: 8:3 size: 619.9 MiB fs: hfsplus
    label: Recovery HD uuid: 9db3ecb9-8192-3e57-99bd-5a2711e45985
  ID-3: /dev/sda5 maj-min: 8:5 size: 48.83 GiB fs: ext4 label: rootMX25
    uuid: d22d3f57-0440-4190-a428-e72091abf0ca
USB:
  Hub-1: 1-0:1 info: full speed or root hub ports: 2 rev: 1.1
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 chip-ID: 1d6b:0001
    class-ID: 0900
  Hub-2: 2-0:1 info: full speed or root hub ports: 8 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-3: 2-1:2 info: Microchip (formerly SMSC) USB 2.0 Hub ports: 4 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 2mA
    chip-ID: 0424:2514 class-ID: 0900
  Device-1: 2-1.1:3 info: Apple Internal Memory Card Reader
    type: mass storage driver: usb-storage interfaces: 1 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 500mA
    chip-ID: 05ac:8403 class-ID: 0806 serial: <filter>
  Device-2: 2-1.2:4 info: Apple Built-in IR Receiver type: HID
    driver: appleir,usbhid interfaces: 1 rev: 2.0 speed: 1.5 Mb/s (183 KiB/s)
    lanes: 1 mode: 1.0 power: 100mA chip-ID: 05ac:8242 class-ID: 0300
  Hub-4: 3-0:1 info: full speed or root hub ports: 6 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-5: 3-1:2 info: Microchip (formerly SMSC) USB 2.0 Hub ports: 3 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 2mA
    chip-ID: 0424:2514 class-ID: 0900
  Hub-6: 3-1.1:4 info: Broadcom BCM2046B1 USB 2.0 Hub (part of BCM2046
    Bluetooth) ports: 3 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1
    chip-ID: 0a5c:4500 class-ID: 0900
  Device-1: 3-1.1.1:6 info: Apple Built-in Bluetooth 2.0+EDR HCI
    type: bluetooth driver: btusb interfaces: 4 rev: 2.0
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 chip-ID: 05ac:8215
    class-ID: fe01 serial: <filter>
  Device-2: 3-1.2:5 info: LaCie Rugged THB USB 3.0 type: mass storage
    driver: uas interfaces: 1 rev: 2.1 speed: 480 Mb/s (57.2 MiB/s) lanes: 1
    mode: 2.0 power: 500mA chip-ID: 059f:1075 class-ID: 0806 serial: <filter>
  Device-3: 3-1.3:7 info: Logitech Logi Bolt Receiver
    type: keyboard,mouse,HID driver: hid-generic,hid-multitouch,usbhid
    interfaces: 4 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1
    power: 98mA chip-ID: 046d:c548 class-ID: 0300
  Device-4: 3-2:3 info: Apple FaceTime HD Camera (Built-in) type: video
    driver: uvcvideo interfaces: 3 rev: 2.0 speed: 480 Mb/s (57.2 MiB/s)
    lanes: 1 mode: 2.0 power: 500mA chip-ID: 05ac:850b class-ID: 0e02
    serial: <filter>
  Hub-7: 4-0:1 info: full speed or root hub ports: 2 rev: 1.1
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 chip-ID: 1d6b:0001
    class-ID: 0900
Sensors:
  System Temperatures: cpu: 54.0 C mobo: N/A
  Fan Speeds (rpm): cpu: 1198
Repos:
  Packages: 1376 pm: pacman pkgs: 1369 libs: 352 tools: octopi,pamac,yay
    pm: flatpak pkgs: 7
  Active pacman repo servers in: /etc/pacman.d/mirrorlist
    1: https://mirror.rabisu.com/mirrors/manjaro/stable/$repo/$arch
    2: https://ftp.snt.utwente.nl/pub/linux/manjaro/stable/$repo/$arch
    3: https://ftp.cc.uoc.gr/mirrors/linux/manjaro/stable/$repo/$arch
    4: https://irltoolkit.mm.fcix.net/manjaro/stable/$repo/$arch
    5: https://mirror.telepoint.bg/manjaro/stable/$repo/$arch
    6: https://mirrors.sonic.net/manjaro/stable/$repo/$arch
    7: https://mirrors.xtom.jp/manjaro/stable/$repo/$arch
Processes:
  CPU top: 5 of 261
  1: cpu: 100% command: ps pid: 37157 mem: 3.70 MiB (0.0%)
  2: cpu: 17.0% command: ./mullvadbrowser.real pid: 35683
    mem: 464.2 MiB (3.8%)
  3: cpu: 12.3% command: mullvadbrowser.real pid: 35931
    mem: 296.0 MiB (2.4%)
  4: cpu: 4.2% command: mullvadbrowser.real pid: 35935 mem: 327.5 MiB (2.7%)
  5: cpu: 2.4% command: audiotube pid: 34124 mem: 465.1 MiB (3.8%)
  Memory top: 5 of 261
  1: mem: 573.1 MiB (4.8%) command: thunderbird pid: 4934 cpu: 0.1%
  2: mem: 465.1 MiB (3.8%) command: audiotube pid: 34124 cpu: 2.4%
  3: mem: 464.2 MiB (3.8%) command: ./mullvadbrowser.real pid: 35683
    cpu: 17.0%
  4: mem: 462.6 MiB (3.8%) command: plasmashell pid: 1001 cpu: 0.2%
  5: mem: 327.5 MiB (2.7%) command: mullvadbrowser.real pid: 35935 cpu: 4.2%
Info:
  Processes: 261 Power: uptime: 1d 20h 25m states: freeze,mem,disk
    suspend: deep avail: s2idle wakeups: 2 hibernate: platform avail: shutdown,
    reboot, suspend, test_resume image: 4.61 GiB
    services: org_kde_powerdevil,upowerd Init: systemd v: 261
    default: graphical tool: systemctl
  Compilers: gcc: 16.1.1 Shell: Bash v: 5.3.15 default: Zsh v: 5.9.2
    running-in: konsole inxi: 3.3.41
2

I’m not able to reproduce this issue. Possibly hardware related?

inxi -zv8 
System:
  Kernel: 7.1.6-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 16.1.1
    clocksource: tsc avail: acpi_pm
    parameters: BOOT_IMAGE=/@/boot/vmlinuz-7.1-x86_64
    root=UUID=ca0fb9dc-ae10-46f2-a467-6c788f67cecc rw rootflags=subvol=@
    quiet splash resume=UUID=a044a1dc-dfd0-493a-b7d8-18cbe3abe8c1
    udev.log_priority=3 sysrq_always_enabled=1 zswap.enabled=1
  Desktop: KDE Plasma v: 6.7.3 tk: Qt v: N/A info: frameworks v: 6.28.0
    wm: kwin_wayland vt: 2 dm: N/A Distro: Manjaro base: Arch Linux
Machine:
  Type: Convertible System: Dell product: XPS 15 9575 v: N/A
    serial: <superuser required> Chassis: type: 31 serial: <superuser required>
  Mobo: Dell model: 0C32VW v: A00 serial: <superuser required> part-nu: 080D
    uuid: <superuser required> Firmware: UEFI vendor: Dell v: 1.28.0
    date: 07/11/2023
Battery:
  ID-1: BAT0 charge: 27.6 Wh (62.1%) condition: 44.4/75 Wh (59.2%)
    volts: 12.15 min: 11.4 model: BYD DELL TMFYT8C type: Li-poly
    serial: <filter> charging: status: not charging type: custom
    avail: adaptive,custom,fast,standard,trickle cycles: N/A
Memory:
  System RAM: total: 16 GiB available: 15.46 GiB used: 4.61 GiB (29.8%)
  Message: For most reliable report, use superuser + dmidecode.
  Array-1: capacity: 16 GiB slots: 1 modules: 1 EC: None
    max-module-size: 16 GiB note: est.
  Device-1: Motherboard type: DDR4 detail: synchronous unbuffered
    (unregistered) size: 16 GiB speed: 2400 MT/s volts: note: check curr: 1
    min: 1 max: 1 width (bits): data: 64 total: 64 manufacturer: SK Hynix
    part-no: HMAA51S6AMR6N-UH serial: N/A
PCI Slots:
  Permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: model: Intel Core i7-8705G bits: 64 type: MT MCP arch: Kaby Lake
    gen: core 8 level: v3 note: check built: 2018 process: Intel 14nm family: 6
    model-id: 0x9E (158) stepping: 9 microcode: 0xF8
  Topology: cpus: 1x dies: 1 clusters: 4 cores: 4 threads: 8 tpc: 2
    smt: enabled cache: L1: 256 KiB desc: d-4x32 KiB; i-4x32 KiB L2: 1024 KiB
    desc: 4x256 KiB L3: 8 MiB desc: 1x8 MiB
  Speed (MHz): avg: 800 min/max: 800/4100 scaling: driver: intel_pstate
    governor: powersave cores: 1: 800 2: 800 3: 800 4: 800 5: 800 6: 800 7: 800
    8: 800 bogomips: 49599
  Flags: 3dnowprefetch abm acpi adx aes aperfmperf apic arat
    arch_capabilities arch_perfmon art avx avx2 bmi1 bmi2 bts clflush
    clflushopt cmov constant_tsc cpuid cpuid_fault cx16 cx8 de ds_cpl dtes64
    dtherm dts epb ept ept_ad erms est f16c flexpriority flush_l1d fma fpu
    fsgsbase fxsr ht hwp hwp_act_window hwp_epp hwp_notify ibpb ibrs ida
    intel_pt invpcid lahf_lm lm mca mce md_clear mmx monitor movbe mpx msr
    mtrr nonstop_tsc nopl nx pae pat pbe pcid pclmulqdq pdcm pdpe1gb pebs pge
    pln pni popcnt pse pse36 pti pts rdrand rdseed rdtscp rep_good sdbg sep
    smap smep ss ssbd sse sse2 sse4_1 sse4_2 ssse3 stibp syscall tm tm2
    tpr_shadow tsc tsc_adjust tsc_deadline_timer vme vmx vnmi vpid x2apic
    xgetbv1 xsave xsavec xsaveopt xsaves xtopology xtpr
  Vulnerabilities:
  Type: gather_data_sampling mitigation: Microcode
  Type: ghostwrite status: Not affected
  Type: indirect_target_selection status: Not affected
  Type: itlb_multihit status: KVM: Split huge pages
  Type: l1tf mitigation: PTE Inversion; VMX: conditional cache flushes, SMT
    vulnerable
  Type: mds mitigation: Clear CPU buffers; SMT vulnerable
  Type: meltdown mitigation: PTI
  Type: mmio_stale_data mitigation: Clear CPU buffers; SMT vulnerable
  Type: old_microcode status: Not affected
  Type: reg_file_data_sampling status: Not affected
  Type: retbleed mitigation: IBRS
  Type: spec_rstack_overflow status: Not affected
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
    prctl
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
    sanitization
  Type: spectre_v2 mitigation: IBRS; IBPB: conditional; STIBP: conditional;
    RSB filling; PBRSB-eIBRS: Not affected; BHI: Not affected
  Type: srbds mitigation: Microcode
  Type: tsa status: Not affected
  Type: tsx_async_abort status: Not affected
  Type: vmscape mitigation: IBPB before exit to userspace
Graphics:
  Device-1: Intel Kaby Lake-H GT2 [HD Graphics 630] vendor: Dell driver: i915
    v: kernel arch: Gen-9.5 process: Intel 14nm built: 2016-20 ports:
    active: eDP-1 empty: DP-1,DP-2,DP-3 bus-ID: 00:02.0 chip-ID: 8086:591b
    class-ID: 0300
  Device-2: Advanced Micro Devices [AMD/ATI] Polaris 22 XL [Radeon RX Vega
    M GL] vendor: Dell driver: amdgpu v: kernel arch: GCN-4
    code: Arctic Islands process: GF 14nm built: 2016-20 pcie: gen: 3
    speed: 8 GT/s lanes: 8 bus-ID: 01:00.0 chip-ID: 1002:694e class-ID: 0380
    temp: 51.0 C
  Device-3: Realtek Integrated_Webcam_HD driver: uvcvideo type: USB rev: 2.0
    speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 1-1:2 chip-ID: 0bda:58f4
    class-ID: 0e02 serial: <filter>
  Display: wayland server: X.org v: 1.21.1.24 with: Xwayland v: 24.1.13
    compositor: kwin_wayland driver: X: loaded: amdgpu,modesetting
    alternate: fbdev,vesa dri: iris,radeonsi gpu: i915 display-ID: 0
  Monitor-1: eDP-1 model: Sharp 0x148d built: 2018 res: mode: 2560x1440
    hz: 60 scale: 125% (1.25) to: 2048x1152 dpi: 284 gamma: 1.2 chroma: red:
    x: 0.667 y: 0.325 green: x: 0.208 y: 0.737 blue: x: 0.145 y: 0.047 white:
    x: 0.318 y: 0.337 size: 344x194mm (13.54x7.64") diag: 395mm (15.5")
    ratio: 16:9 modes: 3840x2160
  EDID-Warnings: 1: parse_edid: unknown flag 0
  API: EGL v: 1.5 hw: drv: intel iris drv: amd radeonsi platforms: device: 0
    drv: radeonsi device: 1 drv: iris device: 2 drv: swrast gbm: drv: radeonsi
    surfaceless: drv: radeonsi wayland: drv: iris x11: drv: iris
  API: OpenGL v: 4.6 vendor: intel mesa v: 26.1.6-arch1.1 glx-v: 1.4
    direct-render: yes renderer: Mesa Intel HD Graphics 630 (KBL GT2)
    device-ID: 8086:591b memory: 15.09 GiB unified: yes display-ID: :0.0
  API: Vulkan v: 1.4.357 layers: 13 device: 0 type: integrated-gpu
    name: Intel HD Graphics 630 (KBL GT2) driver: mesa intel v: 26.1.6-arch1.1
    device-ID: 8086:591b surfaces: N/A device: 1 type: discrete-gpu name: AMD
    Radeon RX Vega M GL Graphics (RADV VEGAM) driver: mesa radv
    v: 26.1.6-arch1.1 device-ID: 1002:694e surfaces: N/A
  Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
    de: kscreen-console,kscreen-doctor gpu: amdgpu_top wl: wayland-info
    x11: xdpyinfo, xprop, xrandr
Audio:
  Device-1: Intel HM175/QM175/CM238 HD Audio vendor: Dell
    driver: snd_hda_intel v: kernel alternate: snd_soc_avs bus-ID: 00:1f.3
    chip-ID: 8086:a171 class-ID: 0403
  API: ALSA v: k7.1.6-1-MANJARO status: kernel-api with: aoss
    type: oss-emulator tools: alsactl,alsamixer,amixer
  Server-1: sndiod v: N/A status: off tools: aucat,midicat,sndioctl
  Server-2: JACK v: 1.9.22 status: off tools: N/A
  Server-3: PipeWire v: 1.6.8 status: active with: 1: pipewire-pulse
    status: active 2: wireplumber status: active 3: pipewire-alsa type: plugin
    tools: pactl,pw-cat,pw-cli,wpctl
Network:
  Device-1: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter
    vendor: Rivet Networks Killer 1435 Wireless-AC driver: ath10k_pci v: kernel
    pcie: gen: 1 speed: 2.5 GT/s lanes: 1 bus-ID: 02:00.0 chip-ID: 168c:003e
    class-ID: 0280 temp: 41.0 C
  IF: wlp2s0 state: up mac: <filter>
  IP v4: <filter> type: dynamic noprefixroute scope: global
    broadcast: <filter>
  IP v6: <filter> type: dynamic noprefixroute scope: global
  IP v6: <filter> type: noprefixroute scope: link
  Device-2: Realtek RTL8153 Gigabit Ethernet Adapter driver: r8152 type: USB
    rev: 3.0 speed: 5 Gb/s lanes: 1 mode: 3.2 gen-1x1 bus-ID: 2-2.2:3
    chip-ID: 0bda:8153 class-ID: 0000 serial: <filter>
  IF: enp0s20f0u2u2 state: down mac: <filter>
  Info: services: NetworkManager, systemd-timesyncd, wpa_supplicant
  WAN IP: <filter>
Bluetooth:
  Device-1: Foxconn / Hon Hai driver: btusb v: 0.8 type: USB rev: 1.1
    speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 1-6:4 chip-ID: 0489:e0a2
    class-ID: e001
  Report: btmgmt ID: hci0 rfk-id: 0 state: up address: <filter> bt-v: 4.2
    lmp-v: 8 status: discoverable: no pairing: no class-ID: 6c0000
Logical:
  Message: No logical block device data found.
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 1.82 TiB used: 179.14 GiB (9.6%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Crucial model: CT2000T710SSD8
    size: 1.82 TiB block-size: physical: 512 B logical: 512 B speed: 126 Gb/s
    lanes: 4 tech: SSD serial: <filter> fw-rev: PBCR5103 temp: 35.9 C
    scheme: GPT
  Message: No optical or floppy data found.
Partition:
  ID-1: / raw-size: 1.8 TiB size: 1.8 TiB (100.00%) used: 179.14 GiB (9.7%)
    fs: btrfs dev: /dev/nvme0n1p3 maj-min: 259:3 label: Manjaro
    uuid: ca0fb9dc-ae10-46f2-a467-6c788f67cecc
  ID-2: /boot/efi raw-size: 512 MiB size: 511 MiB (99.80%)
    used: 664 KiB (0.1%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1 label: EFI
    uuid: FF0B-6823
  ID-3: /home raw-size: 1.8 TiB size: 1.8 TiB (100.00%)
    used: 179.14 GiB (9.7%) fs: btrfs dev: /dev/nvme0n1p3 maj-min: 259:3
    label: Manjaro uuid: ca0fb9dc-ae10-46f2-a467-6c788f67cecc
  ID-4: /home/<filter>/mnt/Dropbox raw-size: N/A size: 2.01 TiB
    used: 340.68 GiB (16.6%) fs: fuse.rclone remote: Dropbox:
  ID-5: /home/<filter>/mnt/GDrive raw-size: N/A size: 102 GiB
    used: 85.28 GiB (83.6%) fs: fuse.rclone remote: GDrive:
  ID-6: /home/<filter>/mnt/OneDrive raw-size: N/A size: 205 GiB
    used: 143.4 GiB (70.0%) fs: fuse.rclone remote: OneDrive:
  ID-7: /var/cache raw-size: 1.8 TiB size: 1.8 TiB (100.00%)
    used: 179.14 GiB (9.7%) fs: btrfs dev: /dev/nvme0n1p3 maj-min: 259:3
    label: Manjaro uuid: ca0fb9dc-ae10-46f2-a467-6c788f67cecc
  ID-8: /var/log raw-size: 1.8 TiB size: 1.8 TiB (100.00%)
    used: 179.14 GiB (9.7%) fs: btrfs dev: /dev/nvme0n1p3 maj-min: 259:3
    label: Manjaro uuid: ca0fb9dc-ae10-46f2-a467-6c788f67cecc
Swap:
  Kernel: swappiness: 10 (default 60) cache-pressure: 100 (default) zswap: yes
    compressor: zstd max-pool: 20%
  ID-1: swap-1 type: partition size: 17.58 GiB used: 0 KiB (0.0%)
    priority: -1 dev: /dev/nvme0n1p2 maj-min: 259:2 label: N/A
    uuid: a044a1dc-dfd0-493a-b7d8-18cbe3abe8c1
Unmounted:
  Message: No unmounted partitions found.
USB:
  Hub-1: 1-0:1 info: hi-speed hub with single TT ports: 16 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Device-1: 1-1:2 info: Realtek Integrated_Webcam_HD type: video
    driver: uvcvideo interfaces: 4 rev: 2.0 speed: 480 Mb/s (57.2 MiB/s)
    lanes: 1 mode: 2.0 power: 500mA chip-ID: 0bda:58f4 class-ID: 0e02
    serial: <filter>
  Hub-2: 1-2:3 info: VIA Labs VL820 Hub ports: 5 rev: 2.1
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 2109:2820
    class-ID: 0900
  Device-1: 1-2.1:6 info: Bizlink DELL DA300 type: HID
    driver: hid-generic,usbhid interfaces: 1 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s)
    lanes: 1 mode: 1.1 power: 100mA chip-ID: 06c4:c412 class-ID: 0300
    serial: <filter>
  Device-2: 1-2.3:8 info: Lite-On USB Multimedia Keyboard type: keyboard,HID
    driver: hid-generic,usbhid interfaces: 2 rev: 1.1
    speed: 1.5 Mb/s (183 KiB/s) lanes: 1 mode: 1.0 power: 100mA
    chip-ID: 04ca:0027 class-ID: 0300
  Device-3: 1-6:4 info: Foxconn / Hon Hai type: bluetooth driver: btusb
    interfaces: 2 rev: 1.1 speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1
    power: 100mA chip-ID: 0489:e0a2 class-ID: e001
  Device-4: 1-10:5 info: Shenzhen Goodix Fingerprint Reader
    type: abstract (modem),CDC-data driver: N/A interfaces: 2 rev: 2.0
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 power: 100mA
    chip-ID: 27c6:5395 class-ID: 0a00 serial: <filter>
  Device-5: 1-11:7 info: Logitech G502 Mouse type: mouse,HID
    driver: hid-generic,usbhid interfaces: 2 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s)
    lanes: 1 mode: 1.1 power: 300mA chip-ID: 046d:c07d class-ID: 0300
    serial: <filter>
  Hub-3: 2-0:1 info: super-speed hub ports: 8 rev: 3.0
    speed: 5 Gb/s (596.0 MiB/s) lanes: 1 mode: 3.2 gen-1x1 chip-ID: 1d6b:0003
    class-ID: 0900
  Hub-4: 2-2:2 info: VIA Labs VL820 Hub ports: 4 rev: 3.1
    speed: 5 Gb/s (596.0 MiB/s) lanes: 1 mode: 3.2 gen-1x1 chip-ID: 2109:0820
    class-ID: 0900
  Device-1: 2-2.2:3 info: Realtek RTL8153 Gigabit Ethernet Adapter
    type: Network driver: r8152 interfaces: 1 rev: 3.0
    speed: 5 Gb/s (596.0 MiB/s) lanes: 1 mode: 3.2 gen-1x1 power: 288mA
    chip-ID: 0bda:8153 class-ID: 0000 serial: <filter>
Sensors:
  System Temperatures: cpu: 63.0 C pch: 41.0 C mobo: N/A gpu: amdgpu
    temp: 51.0 C
  Fan Speeds (rpm): N/A
Repos:
  Packages: pm: pacman pkgs: 1831 libs: 473 tools: pamac,yay pm: flatpak
    pkgs: 0
  Active pacman repo servers in: /etc/pacman.d/mirrorlist
    1: https://ziply.mm.fcix.net/manjaro/testing/$repo/$arch
    2: https://ask4.mm.fcix.net/manjaro/testing/$repo/$arch
    3: https://ipng.mm.fcix.net/manjaro/testing/$repo/$arch
    4: https://ftp.rz.tu-bs.de/pub/mirror/manjaro.org/repos/testing/$repo/$arch
    5: https://ftp.tsukuba.wide.ad.jp/Linux/manjaro/testing/$repo/$arch
Processes:
  CPU top: 5 of 308
  1: cpu: 12.2% command: librewolf pid: 4343 mem: 792.1 MiB (5.0%)
  2: cpu: 7.0% command: kinfocenter pid: 6818 mem: 313.4 MiB (1.9%)
  3: cpu: 4.2% command: kwin_wayland pid: 2669 mem: 308.4 MiB (1.9%)
  4: cpu: 4.2% command: konsole pid: 6870 mem: 112.4 MiB (0.7%)
  5: cpu: 4.0% command: librewolf pid: 5196 mem: 398.8 MiB (2.5%)
  Memory top: 5 of 308
  1: mem: 792.1 MiB (5.0%) command: librewolf pid: 4343 cpu: 12.2%
  2: mem: 398.8 MiB (2.5%) command: librewolf pid: 5196 cpu: 4.0%
  3: mem: 388.8 MiB (2.4%) command: plasmashell pid: 3451 cpu: 0.7%
  4: mem: 383.7 MiB (2.4%) command: librewolf pid: 4992 cpu: 2.4%
  5: mem: 366.4 MiB (2.3%) command: librewolf pid: 4628 cpu: 0.6%
Info:
  Processes: 308 Power: uptime: 22m states: freeze,mem,disk suspend: deep
    avail: s2idle wakeups: 0 hibernate: platform avail: shutdown, reboot,
    suspend, test_resume image: 6.14 GiB services: org_kde_powerdevil,
    power-profiles-daemon, upowerd Init: systemd v: 261 default: graphical
    tool: systemctl
  Compilers: clang: 22.1.8 gcc: 16.1.1 Shell: Zsh v: 5.9.2
    running-in: konsole inxi: 3.3.41
qdbus6 org.kde.KWin /KWin org.kde.KWin.supportInformation 
Version
=======
KWin version: 6.7.3
Qt Version: 6.11.1
Qt compile version: 6.11.1
XCB compile version: 1.17.0

Operation Mode: Wayland

Build Options
=============
KWIN_BUILD_DECORATIONS: yes
KWIN_BUILD_TABBOX: yes
KWIN_BUILD_ACTIVITIES: yes
HAVE_X11_XCB: yes

X11
===
Vendor: The X.Org Foundation
Vendor Release: 12401013
Protocol Version/Revision: 11/0
SHAPE: yes; Version: 0x11
RANDR: yes; Version: 0x14
Composite: yes; Version: 0x4
RENDER: yes; Version: 0xb
XFIXES: yes; Version: 0x50
SYNC: yes; Version: 0x31
RES: yes; Version: 0x12

Decoration
==========
Plugin: org.kde.breeze
Theme: 
Plugin recommends border size: None
onAllDesktopsAvailable: true
alphaChannelSupported: true
closeOnDoubleClickOnMenu: false
alwaysShowExcludeFromCapture: false
decorationButtonsLeft: 0, 2, 12
decorationButtonsRight: 6, 3, 4, 5
borderSize: 0
gridUnit: 10
font: Noto Sans,10,-1,0,400,0,0,0,0,0,0,0,0,0,0,1,,0,0
smallSpacing: 2
largeSpacing: 10

LogicalOutput backend
==============
Name: DRM
Atomic Mode Setting on GPU 0: true

Cursor
======
themeName: breeze_cursors
themeSize: 24

Options
=======
focusPolicy: ClickToFocus
xwaylandCrashPolicy: 1
xwaylandMaxCrashCount: 3
nextFocusPrefersMouse: false
clickRaise: true
autoRaise: false
autoRaiseInterval: 0
delayFocusInterval: 0
separateScreenFocus: true
placement: 5
activationDesktopPolicy: SwitchToOtherDesktop
focusPolicyIsReasonable: true
borderSnapZone: 10
windowSnapZone: 10
centerSnapZone: 0
snapOnlyWhenOverlapping: false
edgeBarrier: 100
cornerBarrier: 1
rollOverDesktops: false
perOutputVirtualDesktops: false
focusStealingPreventionLevel: 1
operationTitlebarDblClick: 5000
operationMaxButtonLeftClick: 5000
operationMaxButtonMiddleClick: 5013
operationMaxButtonRightClick: 5012
commandActiveTitlebar1: MouseRaise
commandActiveTitlebar2: MouseNothing
commandActiveTitlebar3: MouseOperationsMenu
commandInactiveTitlebar1: MouseActivateAndRaise
commandInactiveTitlebar2: MouseNothing
commandInactiveTitlebar3: MouseOperationsMenu
commandWindow1: MouseActivateRaiseOnReleaseAndPassClick
commandWindow2: MouseActivateAndPassClick
commandWindow3: MouseActivateAndPassClick
commandWindowWheel: MouseNothing
commandAll1: MouseUnrestrictedMove
commandAll2: MouseToggleRaiseAndLower
commandAll3: MouseUnrestrictedResize
keyCmdAllModKey: 16777250
doubleClickBorderToMaximize: true
condensedTitle: false
electricBorderMaximize: true
electricBorderTiling: true
electricBorderAllScreenCorner: true
electricBorderCornerRatio: 0.25
borderlessMaximizedWindows: true
killPingTimeout: 5000
compositingMode: 1
allowTearing: false
interactiveWindowMoveEnabled: true
pictureInPictureHomeCorner: BottomRightCorner
pictureInPictureMargin: 20
overlayVirtualKeyboardOnWindows: false

Screen Edges
============
desktopSwitching: false
desktopSwitchingMovingClients: false
cursorPushBackDistance: 1x1
actionTopLeft: 0
actionTop: 0
actionTopRight: 0
actionRight: 0
actionBottomRight: 0
actionBottom: 0
actionBottomLeft: 0
actionLeft: 0

Screens
=======
Number of Screens: 1

Screen 0:
---------
Name: eDP-1
Enabled: 1
Geometry: 0,0,2048x1152
Physical size: 344x194mm
Scale: 1.25
Refresh Rate: 59961
Adaptive Sync: incapable

Compositing
===========
Compositing is active
Compositing Type: OpenGL
OpenGL vendor string: Intel
OpenGL renderer string: Mesa Intel(R) HD Graphics 630 (KBL GT2)
OpenGL version string: 4.6 (Core Profile) Mesa 26.1.6-arch1.1
OpenGL platform interface: EGL
OpenGL shading language version string: 4.60
Driver: Intel
GPU class: Kaby Lake
OpenGL version: 4.6
GLSL version: 4.60
Mesa version: 26.1.6
X server version: 1.24.1
Linux kernel version: 7.1.6
Direct rendering: Requires strict binding: no
Virtual Machine:  no
OpenGL 2 Shaders are used

Loaded Effects:
---------------
shakecursor
outputlocator
colorpicker
zoom
blur
sessionquit
logout
login
slidingpopups
slidingnotifications
windowaperture
slide
glide
frozenapp
fadingpopups
dimscreen
dialogparent
windowview
tileseditor
overview
highlightwindow
blendchanges
startupfeedback
systembell
screentransform
kscreen

Currently Active Effects:
-------------------------
blur

Effect Settings:
----------------
shakecursor:

outputlocator:

colorpicker:

zoom:
zoomFactor: 1.2
mouseTracking: 0
focusDelay: 350
moveFactor: 20
targetZoom: 1

blur:

sessionquit:
pluginId: sessionquit
isActiveFullScreenEffect: false

logout:
pluginId: logout
isActiveFullScreenEffect: false

login:
pluginId: login
isActiveFullScreenEffect: false

slidingpopups:
slideInDuration: 50
slideOutDuration: 50

slidingnotifications:

windowaperture:
pluginId: windowaperture
isActiveFullScreenEffect: false

slide:
horizontalGap: 45
verticalGap: 20
slideBackground: true

glide:
duration: 40
inRotationEdge: Top
inRotationAngle: 3
inDistance: 30
inOpacity: 0.4
outRotationEdge: Bottom
outRotationAngle: 3
outDistance: 30
outOpacity: 0

frozenapp:
pluginId: frozenapp
isActiveFullScreenEffect: false

fadingpopups:
pluginId: fadingpopups
isActiveFullScreenEffect: false

dimscreen:
pluginId: dimscreen
isActiveFullScreenEffect: false

dialogparent:
pluginId: dialogparent
isActiveFullScreenEffect: false

windowview:
activeView: 
delegate: 
animationDuration: 75
ignoreMinimized: false
mode: ModeAllDesktops
partialActivationFactor: 0
gestureInProgress: false
searchText: 
selectedIds: 

tileseditor:
activeView: 
delegate: 
animationDuration: 200

overview:
activeView: 
delegate: 
animationDuration: 75
ignoreMinimized: false
filterWindows: true
organizedGrid: true
overviewPartialActivationFactor: 0
overviewGestureInProgress: false
transitionPartialActivationFactor: 0
transitionGestureInProgress: false
gridPartialActivationFactor: 0
gridGestureInProgress: false
searchText: 

highlightwindow:

blendchanges:

startupfeedback:
type: 1

systembell:

screentransform:

kscreen:


Loaded Plugins:
---------------
BounceKeysPlugin
KeyNotificationPlugin
MouseKeysPlugin
SlowKeysPlugin
StickyKeysPlugin
TouchpadShortcutsPlugin
buttonsrebind
eis
krunnerintegration
nightlight
screencast
screenshot

Available Plugins:
------------------
BounceKeysPlugin
KeyNotificationPlugin
MouseKeysPlugin
SlowKeysPlugin
StickyKeysPlugin
TouchpadShortcutsPlugin
buttonsrebind
eis
gamecontroller
krunnerintegration
nightlight
screencast
screenshot
3

Hi bananamangodog, I’d say not hw. If I use “color accuracy” setting all works as expected … My catch from a quick search is “color efficiency” locks to 10bit depth. I’d point to the device driver, as my imac is 15 years old. May be the last implementations iterations introduced some regressions. But just guessing, I’ve no real idea …

4

Correct - if your display supports higher bit depth changing the option to “prefer accuracy” will allow higher bit depth (and usually selects it automatically).

Which is the interface between linux and your hardware - so it is a hardware limitation in that there is no suitable controller to use it.

5

Right next to that setting, if you hover over the (:information_source:) icon, it says:

DDC/CI is a feature supported by many
monitors. Plasma can use it to adjust
screen brightness with desktop controls,
as if using the monitor's own hardware
buttons and OSD menu.

So both your monitor and the graphics/display hardware need to support DDC/CI.

A quick search suggests that the built-in display on this iMac does not support DDC/CI.

The built-in LCD panel does not expose DDC/CI. You cannot control its brightness using ddcutil or other DDC/CI tools because it’s connected internally over Apple’s embedded display interface, not via a standard DisplayPort/DDC channel.

Change your lock/desktop to a solid background and warm it to what you like. :grin:

7

Hi there, curious my (I)nfo icon does not show that message … I opened this topic because:

  1. that same (I)nfo states “Note that this setting may have a large impact on performance” and
  2. a “few” updates ago all was working as expected. I’ve another distro on the same machine based on X11 KDE 6.3 and there with “color efficiency” all is fine. It is either wayland or recent KDE

Anyway with color accuracy all works as expected (so far) and I’m not experiencing “impacts on performance” :wink: