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