how to set brightness

[Member stephenbbb]

Hello,

is it possible to set the screen brightness in a config file, so it will use that level after a restart?
also is it possible to make antix use the keys on the laptop keyboard that increase/decrease brightness? there is a blue FN key and when pressed in combination with the left arrow, it should decrease the screen brightness.
I know I can do that by running the control center and then the special tool for brightness.
Thanks everybody.
S

[Forum Admin Dave]

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Currently you can add
backlight-brightness -s 50
to your startup file (~/.desktop-session/startup or ~/.wm/startup) where 50 is percentage value from 0-100.
Maybe we can make this more streamlined.

The up and down keys can be handled in a similar way by binding the key pair to run
backlight-brightness +10
or
backlight-brightness -10

Computers are like air conditioners. They work fine until you start opening Windows. ~Author Unknown

[Member stephenbbb]

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I use Icewm. setting the startup value worked.
then I tried:

key "Fn+KP_Left" backlight-brightness -10
key "Fn+KP_Right" backlight-brightness +10

and that does not work. there are no examples of how to refer to the blue Fn key and I am not sure if KP_Left is the correct way to refer to my left arrow key. this is a laptop without a number pad on the right.

[Moderator Brian Masinick]

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https://wiki.linuxquestions.org/wiki/List_of_keysyms

List_of_Keysyms_Recognised_by_Xmodmap

https://wiki.linuxquestions.org/wiki/List_of_Keysyms_Recognised_by_Xmodmap

--
Brian Masinick

[Forum Admin Dave]

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You should be able to use the command ‘xev’ to find the key map names.

Edit: Being a function key they may not show up. If they do not I am not 100% certain on how to make them work. You may be able to change the behaviour in the bios. It may also be made to work by adding / modifying acpi settings via the grub boot line (such as acpi_osi= ).

• This reply was modified 2 years, 3 months ago by Dave.

Computers are like air conditioners. They work fine until you start opening Windows. ~Author Unknown

[Member ensabahnur]

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I’m facing the same problem here, did you figure out how to set the brightness using the brightness key from the laptop? 🙂

[Member stephenbbb]

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I could never figure out how to refer to the keys on my laptop even after looking at the keymap reference provided. the only line in my .icewm/startup is the line setting initial brightness to 50%. however, the keys started working after updating some antix system files. try updating your antix.

[Member Xecure]

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Editing the keys file for your preferred window manager.

For icewm:

###Brightness keys
key "XF86MonBrightnessDown" backlight-brightness -5
key "XF86MonBrightnessUp"   backlight-brightness +5

For fluxbox:

! Brightness keys
XF86MonBrightnessDown :ExecCommand backlight-brightness -5
XF86MonBrightnessUp :ExecCommand backlight-brightness +5

For jwm:

<Key key="XF86MonBrightnessDown" exec:backlight-brightness -5</Key>
<Key key="XF86MonBrightnessUp" exec:backlight-brightness +5</Key>

I took them from the latest update to antiX 21 (not sure if also available in antiX 19)

antiX Live system enthusiast.
General Live Boot Parameters for antiX.

[Member ensabahnur]

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Unfortunately none of these keys worked here on any windows manager. 🙁

I don’t know if is related with kernel problem or kernel commands or sysvinit config, but in MX is working flawlessly. However my machine supports only antiX its really a pretty old one.

Anyway, thanks a lot for your answers guys.

[Member manyroads]

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Have you tried using brightnessctl? From your start script(s) you should be able to define any key binding. Here’s what I use:

I start this in .xsessionrc:

# shared common keybindings (applications)
sxhkd -c ~/.config/sxhkd/base.conf &

Then in base.conf I have:

#Brightness control
XF86MonBrightnessDown
	sudo brightnessctl s 10%- && notify-send -u normal -t 5000 "Backlight    (Down)"
XF86MonBrightnessUp
	sudo brightnessctl s 10%+  && notify-send -u normal -t 5000 "Backlight    (Up)"

You could define XF86MonBrightnessDown (if you don’t have that) to be something like:

#Brightness control
Super + d
	sudo brightnessctl s 10%- && notify-send -u normal -t 5000 "Backlight    (Down)"

• This reply was modified 1 year, 7 months ago by manyroads.

Pax vobiscum,
Mark Rabideau - http://many-roads.com
"For every complex problem there is an answer that is clear, simple, and wrong." H. L. Mencken
dwm & i3wm ~Reg. Linux User #449130
20 Jan 2021 ~ "End of an Error"

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