0

I have had issues with screen brightness not saving in my Clevo Sky-X4C-P7xxTM1-G since 18.04 LTS. I have tried this solution and it didn't work for me. I did make some progress with editing grub when I put GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=video" at least the slide bar would save it's position after a reboot. Moving the bar will change the brightness too.

enter image description here

However, when I reboot the screen remains at full brightness even though the bar is showing the lower setting.

Next I tried to make the /usr/share/X11/xorg.conf.d/80-backlight.conf file with the following settings:

Section "Device"
    Identifier  "Intel Graphics"
    Driver      "intel"
    Option      "AccelMethod"     "sna"
    Option      "Backlight"       "acpi_video0"
    BusID       "PCI:0:2:0"
EndSection

I sudo update-grub each time. After reboot I'm in a black screen with a prompt. I hit alt+F1 and am able to get shell prompt. I commented out everything in the conf file than reboot and now I'm stuck. As I mentioned before I have a Clevo which comes with Intel onboard graphics disabled. All of the video is handled by the Nvidia graphics card. I suspect that the reason this didn't work in my case is because the 80-backlight.conf doesn't have the correct parameters. Does anyone have any clue how I can put the right information into the file? Does the xbacklight package even handle this?

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.