| 1 | <?xml version='1.0' encoding='UTF-8'?>
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| 2 | <!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
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| 3 | <topic xml:lang="en-us" id="customvesa">
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| 4 | <title>Custom VESA Resolutions</title>
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| 5 |
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| 6 | <body>
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| 7 | <p>
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| 8 | Apart from the standard VESA resolutions, the Oracle VM VirtualBox
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| 9 | VESA BIOS enables you to add up to 16 custom video modes which
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| 10 | will be reported to the guest operating system. When using
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| 11 | Windows guests with the Oracle VM VirtualBox Guest Additions, a custom
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| 12 | graphics driver will be used instead of the fallback VESA
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| 13 | solution so this information does not apply.
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| 14 | </p>
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| 15 | <p>
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| 16 | Additional video modes can be configured for each VM using the
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| 17 | extra data facility. The extra data key is called
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| 18 | <codeph>CustomVideoMode<varname>x</varname>
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| 19 | </codeph>
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| 20 | with <varname>x</varname> being a number from 1 to 16.
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| 21 | Please note that modes will be read from 1 until either the
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| 22 | following number is not defined or 16 is reached. The following
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| 23 | example adds a video mode that corresponds to the native display
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| 24 | resolution of many notebook computers:
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| 25 | </p>
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| 26 | <pre xml:space="preserve">$ VBoxManage setextradata <varname>VM-name</varname> "CustomVideoMode1" "1400x1050x16"</pre>
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| 27 | <p>
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| 28 | The VESA mode IDs for custom video modes start at
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| 29 | <codeph>0x160</codeph>. In order to use the above defined
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| 30 | custom video mode, the following command line has to be supplied
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| 31 | to Linux:
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| 32 | </p>
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| 33 | <pre xml:space="preserve">vga = 0x200 | 0x160
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| 34 | vga = 864</pre>
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| 35 | <p>
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| 36 | For guest operating systems with Oracle VM VirtualBox Guest Additions,
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| 37 | a custom video mode can be set using the video mode hint
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| 38 | feature.
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| 39 | </p>
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| 40 | </body>
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| 41 |
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| 42 | </topic>
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