FAILED to start Load/Save #ness of backlight:acpi_video0

Getting this error when restarting or shutting down the system. Does not affect it in any way I can notice but still do not like any "failed" messages so :smiley:

Output of systemctl status systemd-backlight@backlight:acpi_video0.service is the following:

thomas@laptop ~> systemctl status systemd-backlight@backlight:acpi_video0.service
● systemd-backlight@backlight:acpi_video0.service - Load/Save Screen Backlig>
   Loaded: loaded (/usr/lib/systemd/system/systemd-backlight@.service; stati>
   Active: failed (Result: exit-code) since Mon 2020-01-27 13:28:03 CET; 5mi>
     Docs: man:systemd-backlight@.service(8)
  Process: 782 ExecStart=/usr/lib/systemd/systemd-backlight load backlight:a>
 Main PID: 782 (code=exited, status=1/FAILURE)

Jan 27 13:28:03 laptop systemd[1]: Starting Load/Save Screen Backlight Brigh>
Jan 27 13:28:03 laptop systemd-backlight[782]: Failed to get backlight or LE>
Jan 27 13:28:03 laptop systemd[1]: systemd-backlight@backlight:acpi_video0.s>
Jan 27 13:28:03 laptop systemd[1]: systemd-backlight@backlight:acpi_video0.s>
Jan 27 13:28:03 laptop systemd[1]: Failed to start Load/Save Screen Backligh>
lines 1-12/12 (END)...skipping...
● systemd-backlight@backlight:acpi_video0.service - Load/Save Screen Backlight Brightness of backlight:acpi_video0
   Loaded: loaded (/usr/lib/systemd/system/systemd-backlight@.service; static; vendor preset: disabled)
   Active: failed (Result: exit-code) since Mon 2020-01-27 13:28:03 CET; 5min ago
     Docs: man:systemd-backlight@.service(8)
  Process: 782 ExecStart=/usr/lib/systemd/systemd-backlight load backlight:acpi_video0 (code=exited, status=1/FAILURE)
 Main PID: 782 (code=exited, status=1/FAILURE)

Jan 27 13:28:03 laptop systemd[1]: Starting Load/Save Screen Backlight Brightness of backlight:acpi_video0...
Jan 27 13:28:03 laptop systemd-backlight[782]: Failed to get backlight or LED device 'backlight:acpi_video0': No such device
Jan 27 13:28:03 laptop systemd[1]: systemd-backlight@backlight:acpi_video0.service: Main process exited, code=exited, status=1/FAILURE
Jan 27 13:28:03 laptop systemd[1]: systemd-backlight@backlight:acpi_video0.service: Failed with result 'exit-code'.
Jan 27 13:28:03 laptop systemd[1]: Failed to start Load/Save Screen Backlight Brightness of backlight:acpi_video0.
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lines 1-12/12 (END)...skipping...
● systemd-backlight@backlight:acpi_video0.service - Load/Save Screen Backlight Brightness of backlight:acpi_video0
   Loaded: loaded (/usr/lib/systemd/system/systemd-backlight@.service; static; vendor preset: disabled)
   Active: failed (Result: exit-code) since Mon 2020-01-27 13:28:03 CET; 5min ago
     Docs: man:systemd-backlight@.service(8)
  Process: 782 ExecStart=/usr/lib/systemd/systemd-backlight load backlight:acpi_video0 (code=exited, status=1/FAILURE)
 Main PID: 782 (code=exited, status=1/FAILURE)

Jan 27 13:28:03 laptop systemd[1]: Starting Load/Save Screen Backlight Brightness of backlight:acpi_video0...
Jan 27 13:28:03 laptop systemd-backlight[782]: Failed to get backlight or LED device 'backlight:acpi_video0': No such device
Jan 27 13:28:03 laptop systemd[1]: systemd-backlight@backlight:acpi_video0.service: Main process exited, code=exited, status=1/FAILURE
Jan 27 13:28:03 laptop systemd[1]: systemd-backlight@backlight:acpi_video0.service: Failed with result 'exit-code'.
Jan 27 13:28:03 laptop systemd[1]: Failed to start Load/Save Screen Backlight Brightness of backlight:acpi_video0.
~

Appreciate any help! Thanks in advance! :slight_smile:

Don't look at the journal then you'll give yourself a heart attack especially on kde.

Seems like its come up a couple of times on arch, I don't think its anything to worry about though, just saving the brightness level for the next boot.
https://bbs.archlinux.org/viewtopic.php?id=187921
https://bbs.archlinux.org/viewtopic.php?id=183638

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That is a systemd service that tries to save the level of backlight for your monitor when you shut down and restore it when you boot.

To disable that as it doesn't seem to work on your system anyway (It doesn't on mine neither) just execute:

sudo systemctl disable systemd-backlight@.service

:grin: :wink:

3 Likes

Yeah that really gave me an heart atttack :smiley: As you said, the system is not affected in any way I can notice so as long as there is no easy fix I will just leave it that way.

Thanks for the explanation! :slight_smile: Unfortunately the error still persists, but as I said above as long as there is no fix for my system I will leave it as it is I guess :smiley:

1 Like

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Old post: FAILED to start Load/Save #ness of backlight:acpi_video0

Rewriting this in case anyone has found a way/has an idea on how to fix that persisting issue with my system.

Would appreciate it very much! :slight_smile:

Output regarding the issue:

thomas@Asus-Laptop ~> systemctl status systemd-backlight@backlight:acpi_video0.service 
● systemd-backlight@backlight:acpi_video0.service - Load/Save Screen Backlight Brightnes>
     Loaded: loaded (/usr/lib/systemd/system/systemd-backlight@.service; static; vendor >
     Active: failed (Result: exit-code) since Mon 2020-04-06 17:15:09 CEST; 32min ago
       Docs: man:systemd-backlight@.service(8)
    Process: 949 ExecStart=/usr/lib/systemd/systemd-backlight load backlight:acpi_video0>
   Main PID: 949 (code=exited, status=1/FAILURE)

Apr 06 17:15:09 Asus-Laptop systemd[1]: Starting Load/Save Screen Backlight Brightness o>
Apr 06 17:15:09 Asus-Laptop systemd-backlight[949]: Failed to get backlight or LED devic>
Apr 06 17:15:09 Asus-Laptop systemd[1]: systemd-backlight@backlight:acpi_video0.service:>
Apr 06 17:15:09 Asus-Laptop systemd[1]: systemd-backlight@backlight:acpi_video0.service:>
Apr 06 17:15:09 Asus-Laptop systemd[1]: Failed to start Load/Save Screen Backlight Brigh>
thomas@Asus-Laptop ~ [3]> 

1 Like

i too have this issue in my laptop, so as @10yearslate and @Fabby said, it fails to save the current brightness level while shutting dow, as a result when booting up the system the brightness is at 100% and i have to reduce it everytime after boot. :frowning:
My Laptop Model :-
Acer nitro 5 AN515-43
Ryzen 5 3550H with vega 8
Gtx 1650 4GB
8 GB RAM
Manjaro KDE edition.

I'm also experiencing this issue with a brand new Lenovo Thinkpad T14 AMD.
Ryzen 7 Pro 4750U
Vega 7

I was able to resolve this on my AMD Thinkpad X13 by setting acpi_backlight=none in Grub per this forum post. Although I just updated /etc/default/grub directly

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