Screen backlight increase to 100% after active screensaver

[whoomee]

I am using Linux Mint 20.2 Cinnamon and have noticed a (for me) very annoying problem.

The screen backlight on my laptop often increases to 100% after the screensaver has been activated. This happens nerly every time the screensaver has been active. I assume it not shall be like this. If it should, how can I switch of the increase to 100 % brightness?

I often set the screen brightness to about 15 - 20 % because my computer has a very strong backlight. It can nearly be used outdoors.
I have a Huawei Matebook Pro X laptop and I use it often in a dark room. So I really need to reduce the backlight.
I guess the wast majority never notice this problem because their screens are not as bright as my.

It is very annoying to have to reduce the brightness every time I unlock the computer after the screen saver has been activated.
When the screensaver has been activated the it dims the screans brightness. I guess it is here the problem occur, when the brightness shall be set back to what it was before screensaver started.

It works great in all aspects Linux Mint, but not in this area.

What to do?

[SMG]

What to do?

Please give us information about your install by entering this command in a terminal: inxi -Fxxxrz
Click </> from the mini toolbar above the textbox where you type your reply and then place your cursor between the code markers and paste the results of the command between the code markers [code]Results[/code]. This will let us know how Mint sees your hardware.

[whoomee]

Code: Select all

erik@erik-MACH-WX9:~$ inxi -Fxxxrz
System:
  Kernel: 5.11.0-38-generic x86_64 bits: 64 compiler: N/A 
  Desktop: Cinnamon 5.0.6 wm: muffin 5.0.2 dm: LightDM 1.30.0 
  Distro: Linux Mint 20.2 Uma base: Ubuntu 20.04 focal 
Machine:
  Type: Laptop System: HUAWEI product: MACH-WX9 v: M12 serial: <filter> 
  Mobo: HUAWEI model: MACH-WX9 v: M12 serial: <filter> UEFI: HUAWEI v: 1.28 
  date: 03/15/2019 
Battery:
  ID-1: BAT0 charge: 52.8 Wh condition: 52.8/56.3 Wh (94%) volts: 8.6/7.6 
  model: DYNAPACK HB4593R1ECW type: Li-ion serial: <filter> status: Full 
  cycles: 119 
CPU:
  Topology: Quad Core model: Intel Core i7-8550U bits: 64 type: MT MCP 
  arch: Kaby Lake rev: A L2 cache: 8192 KiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
  bogomips: 31999 
  Speed: 832 MHz min/max: 400/4000 MHz Core speeds (MHz): 1: 961 2: 1806 
  3: 930 4: 801 5: 963 6: 800 7: 800 8: 800 
Graphics:
  Device-1: Intel UHD Graphics 620 vendor: Huawei driver: i915 v: kernel 
  bus ID: 00:02.0 chip ID: 8086:5917 
  Device-2: NVIDIA GP108M [GeForce MX150] vendor: Huawei driver: nvidia 
  v: 460.91.03 bus ID: 01:00.0 chip ID: 10de:1d12 
  Display: x11 server: X.Org 1.20.11 driver: modesetting,nvidia 
  unloaded: fbdev,nouveau,vesa resolution: 3000x2000~60Hz 
  OpenGL: renderer: Mesa Intel UHD Graphics 620 (KBL GT2) v: 4.6 Mesa 21.0.3 
  direct render: Yes 
Audio:
  Device-1: Intel Sunrise Point-LP HD Audio vendor: Huawei 
  driver: snd_hda_intel v: kernel bus ID: 00:1f.3 chip ID: 8086:9d71 
  Sound Server: ALSA v: k5.11.0-38-generic 
Network:
  Device-1: Intel Wireless 8265 / 8275 vendor: Huawei driver: iwlwifi 
  v: kernel port: 3000 bus ID: 3c:00.0 chip ID: 8086:24fd 
  IF: wlp60s0 state: up mac: <filter> 
Drives:
  Local Storage: total: 476.94 GiB used: 162.06 GiB (34.0%) 
  ID-1: /dev/nvme0n1 vendor: Samsung model: MZVLB512HAJQ-00000 
  size: 476.94 GiB speed: 31.6 Gb/s lanes: 4 serial: <filter> rev: EXA7201Q 
  scheme: GPT 
Partition:
  ID-1: / size: 217.95 GiB used: 97.57 GiB (44.8%) fs: ext4 
  dev: /dev/nvme0n1p3 
Sensors:
  System Temperatures: cpu: 33.0 C mobo: N/A 
  Fan Speeds (RPM): N/A 
Repos:
  No active apt repos in: /etc/apt/sources.list 
  No active apt repos in: /etc/apt/sources.list.d/additional-repositories.list 
  Active apt repos in: /etc/apt/sources.list.d/google-chrome.list 
  1: deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
  Active apt repos in: /etc/apt/sources.list.d/nordvpn.list 
  1: deb https://repo.nordvpn.com/deb/nordvpn/debian stable main
  Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
  1: deb http://packages.linuxmint.com uma main upstream import backport #id:linuxmint_main
  2: deb http://archive.ubuntu.com/ubuntu focal main restricted universe multiverse
  3: deb http://archive.ubuntu.com/ubuntu focal-updates main restricted universe multiverse
  4: deb http://archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse
  5: deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
  6: deb http://archive.canonical.com/ubuntu/ focal partner
  Active apt repos in: /etc/apt/sources.list.d/opencpn-opencpn-focal.list 
  1: deb http://ppa.launchpad.net/opencpn/opencpn/ubuntu focal main
  Active apt repos in: /etc/apt/sources.list.d/spotify.list 
  1: deb http://repository.spotify.com stable non-free
  Active apt repos in: /etc/apt/sources.list.d/svtplay-dl.list 
  1: deb https://apt.svtplay-dl.se/ svtplay-dl release
  Active apt repos in: /etc/apt/sources.list.d/teams.list 
  1: deb [arch=amd64] https://packages.microsoft.com/repos/ms-teams stable main
Info:
  Processes: 353 Uptime: 8d 22h 16m Memory: 15.39 GiB used: 8.18 GiB (53.2%) 
  Init: systemd v: 245 runlevel: 5 Compilers: gcc: 9.3.0 alt: 7/8/9 
  Shell: bash v: 5.0.17 running in: gnome-terminal inxi: 3.0.38 
erik@erik-MACH-WX9:~$ BB

[SMG]

The screen backlight on my laptop often increases to 100% after the screensaver has been activated. This happens nerly every time the screensaver has been active.

Does the backlight increase when the screensaver starts or after you unlock the computer? Considering how low you normally keep the brightness, I would think there would be a flash of light when the setting changes from 15-20% to 100%.

I do not see anything in your data which could indicate an issue. The next time you unlock the computer after this happens, run dmesg -T | tail -n 200 in a terminal. Maybe it will give an indication of what is happening.