Mensaje de error al apagar y encender

Cada vez que apago, prendo o reinicio mi laptop, se presenta el siguiente mensaje:
[Failed] Fail to start Load/Save #s of leds:dell::kbd_backlight

Mi pregunta es: ¿qué es kbd_backlight y cómo lo desactivo?

Ejecutando systemctl | grep failed muestra lo siguiente:
● systemd-backlight@leds:dell::kbd_backlight.service loaded failed failed Load/Save Screen Backlight Brightness of leds:dell::kbd_backlight

Ejecutando systemctl status systemd-backlight@leds\:dell\:\:kbd_backlight.service muestra lo siguiente:

     Loaded: loaded (/usr/lib/systemd/system/systemd-backlight@.service; static)
     Active: failed (Result: exit-code) since Sat 2021-03-20 11:40:20 -03; 6h ago
       Docs: man:systemd-backlight@.service(8)
    Process: 392 ExecStart=/usr/lib/systemd/systemd-backlight load leds:dell::kbd_backlight (code=exited, status=1/FAILURE)
   Main PID: 392 (code=exited, status=1/FAILURE)

mar 20 11:40:20 adriik-inspiron143467 systemd[1]: Starting Load/Save Screen Backlight Brightness of leds:dell::kbd_backlight...
mar 20 11:40:20 adriik-inspiron143467 systemd-backlight[392]: dell::kbd_backlight: Failed to read current brightness: Invalid argument
mar 20 11:40:20 adriik-inspiron143467 systemd[1]: systemd-backlight@leds:dell::kbd_backlight.service: Main process exited, code=exited, status=1/FAILURE
mar 20 11:40:20 adriik-inspiron143467 systemd[1]: systemd-backlight@leds:dell::kbd_backlight.service: Failed with result 'exit-code'.
mar 20 11:40:20 adriik-inspiron143467 systemd[1]: Failed to start Load/Save Screen Backlight Brightness of leds:dell::kbd_backlight
Info de mi laptop


  Kernel: 5.11.6-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.0 
  parameters: BOOT_IMAGE=/boot/vmlinuz-5.11-x86_64 
  root=UUID=7c66e5a6-0ac0-409e-a7c7-4abb200d69cb ro quiet apparmor=1 
  security=apparmor udev.log_priority=3 
  Desktop: KDE Plasma 5.21.3 tk: Qt 5.15.2 wm: kwin_x11 vt: 1 dm: SDDM 
  Distro: Manjaro Linux base: Arch Linux 
  Type: Laptop System: Dell product: Inspiron 14-3467 v: N/A serial: <filter> 
  Chassis: type: 9 serial: <filter> 
  Mobo: Dell model: 0JXKVV v: A00 serial: <filter> UEFI: Dell v: 2.9.0 
  date: 01/17/2019 
  ID-1: BAT0 charge: 38.3 Wh (100.0%) condition: 38.3/41.4 Wh (92.5%) 
  volts: 16.7 min: 14.8 model: LGC-LGC2.80 DELL 991XP71 type: Li-poly 
  serial: <filter> status: Full 
  RAM: total: 3.71 GiB used: 2.58 GiB (69.5%) 
  RAM Report: permissions: Unable to run dmidecode. Root privileges required. 
  Info: Dual Core model: Intel Core i3-6006U bits: 64 type: MT MCP 
  arch: Skylake family: 6 model-id: 4E (78) stepping: 3 microcode: E2 cache: 
  L2: 3 MiB bogomips: 16006 
  Speed: 800 MHz min/max: 400/2000 MHz Core speeds (MHz): 1: 800 2: 800 3: 800 
  4: 800 
  Flags: 3dnowprefetch abm acpi adx aes aperfmperf apic arat 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 intel_pt invpcid invpcid_single 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 
  Device-1: Intel Skylake GT2 [HD Graphics 520] vendor: Dell driver: i915 
  v: kernel bus-ID: 00:02.0 chip-ID: 8086:1916 class-ID: 0300 
  Device-2: Sunplus Innovation Integrated Webcam type: USB driver: uvcvideo 
  bus-ID: 1-5:2 chip-ID: 1bcf:2c00 class-ID: 0e02 
  Display: x11 server: X.Org 1.20.10 compositor: kwin_x11 driver: 
  loaded: modesetting unloaded: intel alternate: fbdev,vesa display-ID: :0 
  screens: 1 
  Screen-1: 0 s-res: 1366x768 s-dpi: 96 s-size: 361x203mm (14.2x8.0") 
  s-diag: 414mm (16.3") 
  Monitor-1: eDP-1 res: 1366x768 hz: 60 dpi: 112 size: 309x173mm (12.2x6.8") 
  diag: 354mm (13.9") 
  OpenGL: renderer: Mesa Intel HD Graphics 520 (SKL GT2) v: 4.6 Mesa 20.3.4 
  direct render: Yes 
  Device-1: Intel Sunrise Point-LP HD Audio vendor: Dell driver: snd_hda_intel 
  v: kernel alternate: snd_soc_skl bus-ID: 00:1f.3 chip-ID: 8086:9d70 
  class-ID: 0403 
  Sound Server-1: ALSA v: k5.11.6-1-MANJARO running: yes 
  Sound Server-2: sndio v: N/A running: no 
  Sound Server-3: JACK v: 0.125.0 running: no 
  Sound Server-4: PulseAudio v: 14.2 running: yes 
  Sound Server-5: PipeWire v: 0.3.23 running: no 
  Device-1: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter 
  vendor: Dell Vostro 3470 driver: ath9k v: kernel port: f040 bus-ID: 01:00.0 
  chip-ID: 168c:0036 class-ID: 0280 
  IF: wlp1s0 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: dynamic noprefixroute scope: global 
  IP v6: <filter> type: noprefixroute scope: link 
  Device-2: Realtek RTL810xE PCI Express Fast Ethernet vendor: Dell 
  driver: r8169 v: kernel port: e000 bus-ID: 02:00.0 chip-ID: 10ec:8136 
  class-ID: 0200 
  IF: enp2s0 state: down mac: <filter> 
  WAN IP: <filter> 
  Device-1: Qualcomm Atheros type: USB driver: btusb v: 0.8 bus-ID: 1-8:28 
  chip-ID: 0cf3:e005 class-ID: e001 
  Report: This feature requires one of these tools: hciconfig/bt-adapter 
  Message: No LVM data was found. 
  Message: No RAID data was found. 
  Local Storage: total: 223.57 GiB used: 56.43 GiB (25.2%) 
  SMART Message: Unable to run smartctl. Root privileges required. 
  ID-1: /dev/sda maj-min: 8:0 vendor: Kingston model: SA400S37240G 
  size: 223.57 GiB block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s 
  rotation: SSD serial: <filter> rev: B1H5 scheme: GPT 
  Message: No Optical or Floppy data was found. 
  ID-1: / raw-size: 223.27 GiB size: 218.77 GiB (97.98%) 
  used: 56.43 GiB (25.8%) fs: ext4 dev: /dev/sda2 maj-min: 8:2 label: N/A 
  uuid: 7c66e5a6-0ac0-409e-a7c7-4abb200d69cb 
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%) 
  used: 312 KiB (0.1%) fs: vfat dev: /dev/sda1 maj-min: 8:1 label: N/A 
  uuid: 6BBE-DC20 
  Alert: No Swap data was found. 
  Message: No Unmounted partitions found. 
  Hub-1: 1-0:1 info: Full speed (or root) Hub ports: 12 rev: 2.0 
  speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900 
  Device-1: 1-1:26 info: USB OPTICAL MOUSE type: Mouse,Keyboard 
  driver: hid-generic,usbhid interfaces: 2 rev: 1.1 speed: 1.5 Mb/s 
  power: 100mA chip-ID: 4e53:5407 class-ID: 0301 
  Device-2: 1-2:23 info: Samsung Galaxy A5 (MTP) type: Still Imaging 
  driver: N/A interfaces: 1 rev: 2.0 speed: 480 Mb/s power: 96mA 
  chip-ID: 04e8:6860 class-ID: 0601 serial: <filter> 
  Device-3: 1-5:2 info: Sunplus Innovation Integrated Webcam type: Video 
  driver: uvcvideo interfaces: 2 rev: 2.0 speed: 480 Mb/s power: 500mA 
  chip-ID: 1bcf:2c00 class-ID: 0e02 
  Device-4: 1-6:3 info: Realtek RTS5129 Card Reader Controller 
  type: <vendor specific> driver: rtsx_usb,rtsx_usb_ms,rtsx_usb_sdmmc 
  interfaces: 1 rev: 2.0 speed: 480 Mb/s power: 500mA chip-ID: 0bda:0129 
  class-ID: ff00 serial: <filter> 
  Device-5: 1-8:28 info: Qualcomm Atheros type: Bluetooth driver: btusb 
  interfaces: 2 rev: 1.1 speed: 12 Mb/s power: 100mA chip-ID: 0cf3:e005 
  class-ID: e001 
  Hub-2: 2-0:1 info: Full speed (or root) Hub ports: 6 rev: 3.0 speed: 5 Gb/s 
  chip-ID: 1d6b:0003 class-ID: 0900 
  System Temperatures: cpu: 43.0 C mobo: 43.0 C 
  Fan Speeds (RPM): cpu: 0 
  Processes: 192 Uptime: 6h 54m wakeups: 9 Init: systemd v: 247 
  tool: systemctl Compilers: gcc: 10.2.0 clang: 11.1.0 Packages: 1589 
  pacman: 1586 lib: 479 flatpak: 0 snap: 3 Shell: Bash v: 5.1.0 
  running-in: konsole inxi: 3.3.03

Por su nombre, debe ser el servicio de retroiluminación del teclado. Puedes desactivarlo para la sesión actual con:
systemctl stop systemd-backlight@leds\:dell\:\:kbd_backlight.service

Y definitivamente con:
systemctl disable systemd-backlight@leds\:dell\:\:kbd_backlight.service

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