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popetto
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Joined: 13 Aug 2019
Posts: 27
Location: Italy
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 Posted: Sat Apr 03, 2021 5:47 pm Post subject: Save last session screen brightness |
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Hi all,
I'm writing here after a deep search on the web on the topic. I'm trying to make Gentoo save last session's screen brightness in order to use it in the next session. I found several topics on this problem but what I need isn't a script that does this job. I did this on another laptop but unfortunately I don't remember how and I don't know how to find the guide I used. So, the question is: has anyone got a solution for this problem that doesn't involve the use of scripts or something external to the system?
Thanks in advance 
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gasmat
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Joined: 15 Feb 2021
Posts: 10
Location: Italy
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| Posted: Sun Apr 04, 2021 3:12 pm Post subject: |
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I think you read this https://wiki.archlinux.org/index.php/Backlight#Kernel_command-line_options, it's one of the three examples but I don't know which one (try, at the moment I haven't the computer...)
P.S.: Thank you for reminding me of something I always forget
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popetto
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Joined: 13 Aug 2019
Posts: 27
Location: Italy
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| Posted: Mon Apr 05, 2021 7:14 am Post subject: |
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 What I meant was make Gentoo (or Plasma, in my case) have the same brightness it had in the last session (i.e. 25% - 25%) and not a fixed brightness at every start.
Probably I didn't read well the Arch guide
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Banana
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Joined: 21 May 2004
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Location: Germany
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popetto
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Joined: 13 Aug 2019
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| Posted: Mon Apr 05, 2021 7:59 am Post subject: |
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| Banana wrote: | | do you use a desktop enviroment? |
Yes, I use plasma.
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gasmat
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Joined: 15 Feb 2021
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| Posted: Mon Apr 05, 2021 7:59 am Post subject: |
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I tried to add
| Code: | | acpi_backlight = vendor |
(as they say on arch linux) but it doesn't work for me (when I was using Arch it worked...).
Did you run sudo grub-mkconfig -o /boot/grub/grub.cfg after changing the kernel parameters?
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popetto
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Joined: 13 Aug 2019
Posts: 27
Location: Italy
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| Posted: Mon Apr 05, 2021 8:09 am Post subject: |
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| gasmat wrote: | I tried to add
| Code: | | acpi_backlight = vendor |
(as they say on arch linux) but it doesn't work for me (when I was using Arch it worked...).
Did you run sudo grub-mkconfig -o /boot/grub/grub.cfg after changing the kernel parameters? |
Yes, I ran it but it doesn't work... I have no idea of how to achieve it...
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