VirtualBox full screen mode, wrong aspect ratio

Discussions about using Windows guests in VirtualBox.
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haba713
Posts: 3
Joined: 6. May 2009, 17:25
Primary OS: Debian other
VBox Version: OSE Debian
Guest OSses: Windows 10 Pro
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VirtualBox full screen mode, wrong aspect ratio

Post by haba713 »

Hi all

When running VirtualBox guest in the full-screen mode in an external monitor attached to a laptop computer (HDMI) how can I choose the external monitor native resolution in the guest OS?

Only the internal screen maximum resolution (and lower resolutions) seems to be available. My external monitor native resolution is 1920 x 1200 (aspect ratio 16:10) and the internal screen native resolution is 1920 x 1080 (aspect ratio 16:9).

I've tried to re-install Guest Additions, switched between normal and full-screen modes,
VBoxManage setextradata "Windows 10" "CustomVideoMode1" "1920x1200x32"
etc. but nothing helps.

- Host: Dell Precision 7510, Radeon HD 8890M, Debian Linux Stretch 64-bit, Xfce 4.12, VirtualBox 5.2.18
- Guest: Windows 10 Pro 1809 64-bit, VirtualBox Guest Additions 5.2.18

Kind regards,

Harri
socratis
Site Moderator
Posts: 27330
Joined: 22. Oct 2010, 11:03
Primary OS: Mac OS X other
VBox Version: PUEL
Guest OSses: Win(*>98), Linux*, OSX>10.5
Location: Greece

Re: VirtualBox full screen mode, wrong aspect ratio

Post by socratis »

Under the View menu, choose Full Screen Mode. Don't mess with the resolutions manually. If you go full screen, you go full screen, that's it. You don't "set" the resolution.
Do NOT send me Personal Messages (PMs) for troubleshooting, they are simply deleted.
Do NOT reply with the "QUOTE" button, please use the "POST REPLY", at the bottom of the form.
If you obfuscate any information requested, I will obfuscate my response. These are virtual UUIDs, not real ones.
Afflospark
Posts: 2
Joined: 20. Apr 2019, 19:27
Primary OS: MS Windows 10
VBox Version: OSE Fedora
Guest OSses: fedora31
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Re: VirtualBox full screen mode, wrong aspect ratio

Post by Afflospark »

Hello,
You have to go to the File menu and activate the Environment setting.
Then you select The Display option and change the setting for Maximum guest size.
After that, you have to reboot your virtual machine.
set your arbitrary size there both width and height.
Thanks
socratis
Site Moderator
Posts: 27330
Joined: 22. Oct 2010, 11:03
Primary OS: Mac OS X other
VBox Version: PUEL
Guest OSses: Win(*>98), Linux*, OSX>10.5
Location: Greece

Re: VirtualBox full screen mode, wrong aspect ratio

Post by socratis »

@Afflospark
You don't have to do any of these things in a default VirtualBox installation.

If you had to do a single one of them, I would have mentioned it... ;)
Do NOT send me Personal Messages (PMs) for troubleshooting, they are simply deleted.
Do NOT reply with the "QUOTE" button, please use the "POST REPLY", at the bottom of the form.
If you obfuscate any information requested, I will obfuscate my response. These are virtual UUIDs, not real ones.
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