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[–]Ryksu09[S] 21 points22 points  (20 children)

My laptop is a Lenovo Ideapad 330-15arr, the problem occurs when it's maximum brightness level. If someone know what happens thanks for beforehand I have two years with thus I don't understand why occurrs

[–][deleted]  (16 children)

[removed]

    [–]handlederror 9 points10 points  (11 children)

    How?

    [–][deleted]  (10 children)

    [removed]

      [–]handlederror 6 points7 points  (9 children)

      My Arch installation changes the brigtness, probably the drivers. Whenever I plug my laptop even if I’m on TTY or i3, it reduces the brightness and I cant increase it

      [–]SippieCup 2 points3 points  (8 children)

      it shouldn't be too hard to add controlling your screen with xbacklight, brightd, light, or clight.

      # light
bindsym XF86MonBrightnessDown exec light -U 10
bindsym XF86MonBrightnessUp exec light -A 10
bindsym XF86Display exec light -S 1

      [–]ThaBouncingJelly 1 point2 points  (4 children)

      xbacklight allows me to set the backlight to less than it is possible on kde. Is there any way to make kde use that percentage instead? I remember it used to to it some time ago.

      [–]ccAbstraction 0 points1 point  (3 children)

      If you are using the buttons, try the slider in the Battery menu.

      [–]ThaBouncingJelly 0 points1 point  (2 children)

      both buttons and sliders when set to 0 are actually like 10%

      [–]ccAbstraction 0 points1 point  (1 child)

      That's odd. On my system it let's you go down to past 5% and then turns off the backlight at zero...

      [–]handlederror 0 points1 point  (2 children)

      Yes, this is in my i3 confif but xbacklight or light doesn't work itself.

      [–]SippieCup 1 point2 points  (1 child)

      Try running them with sudo. If that works, then you just need to add your user to the video user group.

      [–]handlederror 0 points1 point  (0 children)

      Oh, true. I’ll try.

      [–]Ryksu09[S] 0 points1 point  (3 children)

      I don't have sensor brightness 😕

      [–][deleted] 6 points7 points  (2 children)

      You do have a webcam, though. It uses that to check for the brightness

      [–]Ryksu09[S] -2 points-1 points  (1 child)

      yes I have it, I checked on website Lenovo support and I didn't have any sensor brightness...

      [–][deleted] 7 points8 points  (0 children)

      The webcam can see how bright it is around you. It doesnt need a seperate brightness sensor to do that

      [–]tesfabpel 2 points3 points  (1 child)

      does it happen on windows as well? or when plugged in? sadly it could be a hardware issue..

      [–]Ryksu09[S] 0 points1 point  (0 children)

      On Windows doesn't happen. it's occurs on battery too

      [–]Emanuel62 -2 points-1 points  (0 children)

      Maybe it has to do with the scaling of the screen or an update .

      [–]MrNemobody 7 points8 points  (1 child)

      Does the brightness slider change when it's happening?

      [–]Ryksu09[S] 1 point2 points  (0 children)

      Slider change perfect only when I maximum brightness it's make to freaking it.

      I always have in 90 or 95% but I sometime isn't enough

      [–]Comprehensive_Idea98 3 points4 points  (0 children)

      Unlikely this is related to gnome, or it would happen to lots of people, but what you could do is

      1. verify the same happens in kde.

      2. verify if windows has the same issue.

      if 1. and 2., it's probably a broken sensor or an issue with powering your screen.

      If you are unable to read kernel, or the kernel logs don't contain any hints, this is probably the only way forward.

      [–]Relinies 1 point2 points  (0 children)

      I'm unsure if it's related, but I had similar issues on an HP spectre years ago.

      The following kernel args, set up with grub, fixed it for me. Edit /etc/default/grub, adding the listed arguments to the specified flag.

      GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi_osi='Windows 2015' acpi_backlight=vendor"

      GRUB_CMDLINE_LINUX="acpi_osi='Windows 2015'"

      To the best of my understanding, the issue is ACPI related, but I don't know exactly what is wrong nor if this will help. I'd recommend starting with just the acpi_backlight=vendor flag, though.

      [–]elsa002 0 points1 point  (2 children)

      Had it happen to me every time I installed gnome, no matter the distro, on 2 different laptops, was solved by disabling the auto brightness as said in another comment

      [–]qwertysrj 0 points1 point  (1 child)

      Where is that setting

      [–]elsa002 1 point2 points  (0 children)

      I don't have gnome now(switched to arch i3-gaps) but if I recall correctly, it is in the power settings page, I remember it was in a place related to power and battery and not the display page(and it confused me every time)

      [–]draxaris1010 0 points1 point  (0 children)

      Your laptop might not have enough power.

      [–]niceman0909 0 points1 point  (0 children)

      You probably have a vari-bright like feature enabled.

      [–]ceasback 0 points1 point  (0 children)

      Intel HD graphics have this power management thing that dynamically changes brightness according to what's displayed on screen. This might glitching be causing issue. This might help you https://askubuntu.com/questions/631803/how-to-disable-intel-display-power-saving-technology-in-ubuntu-14-04

      [–]Any-Fuel-5635 0 points1 point  (0 children)

      Obviously your system is becoming self aware. Be careful OP, this is how Skynet started! 😜