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Last modified by Mélodie on 2026/02/18 07:15
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1 = Configure brightness control keys =
2
3 On a Lenovo Thinkpad X230 netbook, the Fn+F8/F9 keys did not change the screen brightness. The following procedure resolves this issue.
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5
6 ~1. Package installation
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8 {{code language="bash"}}
9 sudo apt update && sudo apt install brightnessctl
10 {{/code}}
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12
13 2. Hardware permissions configuration (udev)
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15 Create the file:
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17 {{code language="bash"}}sudo nano /etc/udev/rules.d/90-backlight.rules{{/code}} // ~~ nano or vim or mcedit or vi or le (text editor)//
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19
20 Add the following line:
21 {{code language="bash"}}ACTION=="add", SUBSYSTEM=="backlight", KERNEL=="intel_backlight", GROUP="video", MODE="0664"{{/code}}
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23
24 3. Keyboard shortcuts configuration (Openbox)
25 Edit the files:
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27 ///etc/xdg/openbox/rc.xml //and// /.config/openbox/lxde-rc.xml//
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29
30 Insert inside the <keyboard> section:
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32 ><keybind key="XF86MonBrightnessUp">
33 ><action name="Execute">
34 ><command>brightnessctl set +5%</command>
35 ></action>
36 ></keybind>
37 ><keybind key="XF86MonBrightnessDown">
38 ><action name="Execute">
39 ><command>brightnessctl set 5%-</command>
40 ></action>
41 ></keybind>
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43
44 4. Default user profile installation (skel)
45
46 {{code language="bash"}}
47 sudo mkdir -p /etc/skel/.config/openbox && sudo rsync ~/.config/openbox/lxde-rc.xml /etc/skel/.config/openbox/lxde-rc.xml
48 {{/code}}
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50
51 5. Reboot
52
53 {{code language="bash"}}
54 sudo reboot
55 {{/code}}