[CLOSED] Backlight:acpi_video1.service & backlight:amdgpu_bl1.service failed

# systemctl --failed
  UNIT                                            LOAD   ACTIVE SUB    DESCRIPTION                                                   
● systemd-backlight@backlight:acpi_video1.service loaded failed failed Load/Save Screen Backlight Brightness of backlight:acpi_video1
● systemd-backlight@backlight:amdgpu_bl1.service  loaded failed failed Load/Save Screen Backlight Brightness of backlight:amdgpu_bl1

When only using external monitor via HDMI for the laptop, the the laptop’s screen display nothing, but the backlight of the screen is always on. What’s the problem? How to fix it?

Version Info

  • manjaro xfce updated on 2020-10-26
  • kernel 5.8.16-2

Harware Info

  • CPU: R7-4800H with amd integrated gpu
  • nvidia display adapter (the xorg.conf is auto generated by nvidia-xconfig, only this gpu is listed. BTW, when using the auto generated xorg.conf, the laptop’s screen can’t be detected anymore, why?)

:+1: Welcome to Manjaro! :+1:

Please read this:

and post some more information so we can see what’s really going on. Now we know the symptom of the disease, but we need some more probing to know where the origin lies…

An inxi --admin --verbosity=7 --filter --no-host --width would be the minimum required information… (Personally Identifiable Information like serial numbers and MAC addresses will be filtered out by the above command)


P.S. If you enter a bit more details in your profile, we can also see which Desktop Environment you’re using, which CPU/GPU you have, …

1 Like

When using the default xorg.conf (i.e. none) on my lap, there is no problem, only the external monitor tears up.

When using the xorg.conf generated by nvidia-xconfg, got this problem, and wakup from suspension not work, booting failaure and success alternate.

I think the essential problem is that my laptop used a private modified nvidia adaptor. So I’ve reinstalled Windows, easy to use but uncontrollable about telemetry.
BTW, I think Linux is more developer friendly, I should buy a Linux compatible computer next time.


Best Regards