Low brightness issues

Hi,

I have been using Manjaro for 1 month without any problem but suddenly, after a reboot, brightness went at its minimum level. I’ve tried to edit /etc/default/grub adding i915.enable_dpcd_backlight=0 but nothing has changed. I’ve tried to install xbacklight too but it doesn’t work. Any advice?

Thank you in advance.

System:
  Kernel: 5.10.34-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.0 
  Desktop: Xfce 4.16.0 tk: Gtk 3.24.24 wm: xfwm4 dm: LightDM 
  Distro: Manjaro Linux base: Arch Linux 
Machine:
  Type: Laptop System: ASUSTeK product: VivoBook_ASUSLaptop X571GT_X571GT 
  v: 1.0 serial: <filter> 
  Mobo: ASUSTeK model: X571GT v: 1.0 serial: <filter> 
  UEFI: American Megatrends v: X571GT.308 date: 12/17/2020 
Battery:
  ID-1: BAT1 charge: 5.9 Wh (98.3%) condition: 6.0/42.3 Wh (14.1%) 
  volts: 12.5 min: 11.6 model: ASUS A32-K55 serial: N/A status: Charging 
CPU:
  Info: 6-Core model: Intel Core i7-9750H bits: 64 type: MT MCP 
  arch: Kaby Lake note: check rev: A cache: L2: 12 MiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
  bogomips: 62399 
  Speed: 900 MHz max: 800 MHz Core speeds (MHz): 1: 900 2: 900 3: 898 4: 849 
  5: 900 6: 900 7: 900 8: 900 9: 900 10: 900 11: 900 12: 849 
Graphics:
  Device-1: Intel UHD Graphics 630 vendor: ASUSTeK driver: i915 v: kernel 
  bus-ID: 00:02.0 chip-ID: 8086:3e9b 
  Device-2: NVIDIA TU117M [GeForce GTX 1650 Mobile / Max-Q] vendor: ASUSTeK 
  driver: N/A bus-ID: 01:00.0 chip-ID: 10de:1f91 
  Device-3: IMC Networks USB2.0 HD UVC WebCam type: USB driver: uvcvideo 
  bus-ID: 1-7:4 chip-ID: 13d3:56a8 
  Display: x11 server: X.Org 1.20.11 driver: loaded: modesetting 
  resolution: 1920x1080~60Hz s-dpi: 96 
  OpenGL: renderer: Mesa Intel UHD Graphics 630 (CFL GT2) v: 4.6 Mesa 21.0.3 
  direct render: Yes 
Audio:
  Device-1: Intel Cannon Lake PCH cAVS vendor: ASUSTeK driver: snd_hda_intel 
  v: kernel bus-ID: 00:1f.3 chip-ID: 8086:a348 
  Sound Server-1: ALSA v: k5.10.34-1-MANJARO running: yes 
  Sound Server-2: JACK v: 0.125.0 running: no 
  Sound Server-3: PulseAudio v: 14.2 running: yes 
  Sound Server-4: PipeWire v: 0.3.26 running: no 
Network:
  Device-1: Intel Wireless-AC 9560 [Jefferson Peak] driver: iwlwifi 
  v: kernel port: 5000 bus-ID: 00:14.3 chip-ID: 8086:a370 
  IF: wlo1 state: up mac: <filter> 
  Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
  vendor: ASUSTeK driver: r8169 v: kernel port: 3000 bus-ID: 03:00.0 
  chip-ID: 10ec:8168 
  IF: enp3s0 state: down mac: <filter> 
Bluetooth:
  Device-1: Intel Bluetooth 9460/9560 Jefferson Peak (JfP) type: USB 
  driver: btusb v: 0.8 bus-ID: 1-14:5 chip-ID: 8087:0aaa 
  Report: rfkill ID: hci0 rfk-id: 3 state: down bt-service: enabled,running 
  rfk-block: hardware: no software: yes address: see --recommends 
RAID:
  Hardware-1: Intel 82801 Mobile SATA Controller [RAID mode] driver: ahci 
  v: 3.0 bus-ID: 00:17.0 chip-ID: 8086.282a 
Drives:
  Local Storage: total: 1.38 TiB used: 57.79 GiB (4.1%) 
  ID-1: /dev/nvme0n1 vendor: Intel model: SSDPEKNW512G8 size: 476.94 GiB 
  speed: 31.6 Gb/s lanes: 4 serial: <filter> temp: 29.9 C 
  ID-2: /dev/sda vendor: Toshiba model: MQ04ABF100 size: 931.51 GiB 
  speed: 6.0 Gb/s serial: <filter> 
Partition:
  ID-1: / size: 228.77 GiB used: 57.75 GiB (25.2%) fs: ext4 
  dev: /dev/nvme0n1p5 
  ID-2: /boot/efi size: 96 MiB used: 36.9 MiB (38.4%) fs: vfat 
  dev: /dev/nvme0n1p2 
Swap:
  Alert: No swap data was found. 
Sensors:
  System Temperatures: cpu: 44.0 C mobo: 27.8 C 
  Fan Speeds (RPM): cpu: 0 
Info:
  Processes: 280 Uptime: 27m Memory: 15.49 GiB used: 1.67 GiB (10.7%) 
  Init: systemd v: 247 Compilers: gcc: 10.2.0 Packages: 1118 pacman: 1112 
  snap: 6 Shell: Bash v: 5.1.4 running-in: xfce4-terminal inxi: 3.3.04

P.S. when I do “sudo powertop --calibrate” brightness is ok, but after calibration returns low.