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grufo

Member

Registered: 2012-08-09

Posts: 100

[SOLVED] Failed to start Load/Save Screen Backlight Brightness

Hi everyone!

I am writing because since months ago I have been having the same problem described in this topic – i.e., during the boot process the following message appears:

[FAILED] Failed to start Load/Save Screen Backlight Brightness of backlight:acpi_video0
See 'systemctl status systemd-backlight@backlight:acpi_video0.service' for details.

But, differently than in that topic, immediately afterwards this other message appears:

[OK] Started Load/Save Screen Backlight Brightness of backlight:radeon_b10

So, my question is: is here anyone who knows how I can avoid that first “FAILED” status message?

*grufo*

Last edited by grufo (2014-10-07 10:10:27)

jasonwryan

Anarchist

From: .nz

Registered: 2009-05-09

Posts: 30,424

Website

Re: [SOLVED] Failed to start Load/Save Screen Backlight Brightness

What does the status message say?

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grufo

Member

Registered: 2012-08-09

Posts: 100

Re: [SOLVED] Failed to start Load/Save Screen Backlight Brightness

What does the status message say?

● 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)
   Active: failed (Result: exit-code) since dom 2014-10-05 18:02:29 CEST; 1h 55min ago
     Docs: man:systemd-backlight@.service(8)
  Process: 334 ExecStart=/usr/lib/systemd/systemd-backlight load %i (code=exited, status=1/FAILURE)
 Main PID: 334 (code=exited, status=1/FAILURE)

ott 05 18:02:29 alba systemd[1]: systemd-backlight@backlight:acpi_video0.service: main process exited, code=exited, status=1/FAILURE
ott 05 18:02:29 alba systemd[1]: Failed to start Load/Save Screen Backlight Brightness of backlight:acpi_video0.
ott 05 18:02:29 alba systemd[1]: Unit systemd-backlight@backlight:acpi_video0.service entered failed state.

(thank you for the answer)

MoonSwan

Member

From: Great White North

Registered: 2008-01-23

Posts: 881

Re: [SOLVED] Failed to start Load/Save Screen Backlight Brightness

I have the same error message and problem.  However, I found a fix for it by adding this to my kernel line in rEFInd: 

acpi_osi="!Windows 2012"

  Unfortunately I cannot get this line to register properly in rEFInd's refind.conf file.  I've tried to escape the quotes, using various incarnations and even trying without the quotes, but rEFInd keeps chopping off everything after the "=" symbol.  Funnily, though, I can manually edit the menu entry when rEFInd's menu comes up and everything works just fine.

If you're not using rEFInd this method may work for you.

grufo

Member

Registered: 2012-08-09

Posts: 100

Re: [SOLVED] Failed to start Load/Save Screen Backlight Brightness

@MoonSwan

I do have a EFI laptop but I do not use rEFInd (I use just GRUB). How you think could I solve?

Last edited by grufo (2014-10-06 10:53:10)

MoonSwan

Member

From: Great White North

Registered: 2008-01-23

Posts: 881

Re: [SOLVED] Failed to start Load/Save Screen Backlight Brightness

On the kernel line you can put that "acpi_osi..." command and that might work for you.  I don't know how to use grub but a menu entry in your grub config file should look something like this:

title  Arch Linux Stock Kernel
root   (hd0,0)
kernel /vmlinuz-linux root=/dev/sda2 ro acpi_osi="!Windows 2012"
initrd /initramfs-linux.img

You'll have to look at the wiki to find out how to insert that into the menu entry and I do hope it works for you.

Last edited by MoonSwan (2014-10-06 16:16:09)

grufo

Member

Registered: 2012-08-09

Posts: 100

Re: [SOLVED] Failed to start Load/Save Screen Backlight Brightness

@MoonSwan

Ohhh yeeeaaah!! Thank you very much!! It works!!
I edited the file /etc/default/grub by adding that parameter (I replaced «"» with «'»):

GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi_osi='!Windows 2012'"

Then I ran grub-mkconfig again and everything worked fine

Solved!

*grufo*

Last edited by grufo (2014-10-07 12:50:28)

MoonSwan

Member

From: Great White North

Registered: 2008-01-23

Posts: 881

Re: [SOLVED] Failed to start Load/Save Screen Backlight Brightness

You're very welcome.  I'm glad I was able to help you solve your issue.