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1 backlight |
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2 ========= |
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3 |
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4 This tool adjust your laptop brightness using ACPI. |
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5 |
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6 It has been designed for broken ACPI (e.g. HP) where fn-keys do not work, |
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7 instead, you can map these keys to call this tool. |
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8 |
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9 Supported systems |
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10 ================= |
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11 |
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12 - Linux, requires video ACPI module, |
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13 - FreeBSD, requires the acpi_video(4) loaded. |
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14 |
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15 Installation |
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16 ============ |
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17 |
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18 It is recommended to install this tool using the setuid to allow non-root users |
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19 to change the laptop backlight. |
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20 |
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21 make |
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22 sudo make install |
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23 |
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24 For FreeBSD, add the following to your **/boot/loader.conf**: |
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25 |
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26 acpi_video_load=YES |
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27 |
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28 Alternatively, you can compile this module into the kernel. |
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29 |
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30 Usage |
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31 ===== |
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32 |
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33 The backlight tool supports two commands, `up` and `down` which increment and |
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34 decrement backlight respectively. |
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35 |
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36 Example: |
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37 |
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38 backlight up |
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39 backlight down |