Guest screen too small

Discussions related to using VirtualBox on Mac OS X hosts.

Guest screen too small

Postby gol » 6. Jan 2019, 05:49

Hi,

I have installed Virtualbox 6.0 on my Mac OSX (Mojave) with ubuntu 18.04.1 LTS (Desktop) as my guest OS. Guest OS installation went fine. However, the desktop screen is just too tiny to read anything. After installing Guest additions, I am getting a blank screen (not even login prompt). How should I proceed?

Other trials
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I then downloaded previous versions of Virtualbox 5.20 and 5.18. The screen size is a little better but still isn't still full even after installing guest additions. Tried to attach the screenshot but is too big.
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Re: Guest screen too small

Postby socratis » 6. Jan 2019, 10:42

  • With VirtualBox 6.0.0 you need to go to the VirtualBox Preferences » Display » Scale Factor = 200%.
  • If you created the Ubuntu VM with 6.0.0, you need to shut down the VM, go to the VM Settings » Display » Screen » Graphics Controller = VBoxVGA.
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Re: Guest screen too small

Postby gol » 6. Jan 2019, 20:38

socratis wrote:
  • If you created the Ubuntu VM with 6.0.0, you need to shut down the VM, go to the VM Settings » Display » Screen » Graphics Controller = VBoxVGA.

This fixed the issue! Thanks.
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Re: Guest screen too small

Postby socratis » 6. Jan 2019, 21:10

I guess the VBoxVGA fixed the black screen issue.
Did you fix the small screen size issue, as per the thread title?
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.
socratis
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Posts: 26901
Joined: 22. Oct 2010, 11:03
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Re: Guest screen too small

Postby mike_hore » 17. Jan 2019, 02:09

i have an iMac with a large screen, and setting the display scale factor to 200% worked for me.
-- Mike.
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Re: Guest screen too small

Postby karuhanga » 12. Sep 2019, 12:11

Copy pasting the answer here because I can't post urls.


You simply need to install the "Guest Additions".
In the Devices menu in the virtual machine's menu bar, Oracle VM VirtualBox has a menu item Insert Guest Additions CD Image, which mounts the Guest Additions ISO file inside your virtual machine. A Windows guest should then automatically start the Guest Additions installer, which installs the Guest Additions on your Windows guest.

Once installed, reboot the VM and you will be able to resize the "window".
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