[vbox-dev] IFramebuffer resolution limits

Rūdolfs Bundulis rudolfs.bundulis at gmail.com
Thu Sep 18 21:20:13 UTC 2014


Hi,

thanks, so I assume I can also do that via IDisplay::setVideoModeHint(),
I'll try that out, it would be an interesting alternative to using multiple
monitors.

2014-09-18 22:23 GMT+03:00 Vitali Pelenjow <Vitali.Pelenjow at oracle.com>:

> Hi,
>
> it is possible to add arbitrary custom resolutions using the
> vboxcontrol.exe (from the guest additions):
> vboxcontrol addcustommode <width> <height> <bpp>
> This mode will then be available in the "Adjust Resolution" dialog.
>
> Also you could try to set an arbitrary high resolution mode either from
> the guest:
> vboxcontrol setvideomode <width> <height> <bpp> <screen>
> where screen = 0 is the primary display.
> Or from the host using the VBoxManage controlvm setvideomodehint command.
>
> Vitali
>
> Rūdolfs Bundulis wrote:
>
>> Hi,
>>
>> another question on IFramebuffer and monitors, yesterday while playing
>> around with my headless implementation I saw that a guest Windows 7
>> actually offers resolutions up to 6400x1200 (I hope I remember correctly)
>> in the "Adjust Resolution" dialog, I assume that comes from the fact that I
>> always return supported as true in IFramebuffer::videoModeSupported (I
>> didn't actually check if resize to this mode would happen). This is also
>> quite interesting since then that would actually give me a way of having a
>> high resolution surface that I could internally split into 1920 x something
>> tiles. But at least from what I saw it looked like only the width was
>> large, not the height, I would have expected a 6400 x something (something
>> being in 16:9 or 4:3 proportion), can anyone advise me on are these modes
>> actually working and can I get a high 16:9/4:3 resolution mode?
>>
>>
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>>
>
>
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