When the VM is off, go to the VM settings and make sure to have in the ‘Screen’ section the video memory at maximum (usually 128Mb) moreover the 2D and 3D video acceleration tick must be empty. Theres one thing you need to keep in mind as you increase the resolution of your virtual machine, especially for higher resolutions like QHD and 4K.
VIRTUALBOX CHANGE RESOLUTION INSTALL
NOTE: as an alternative to the Additions command it is possible to ‘mount’ the additions disk on the VM directly from the Virtualbox tools menu a window will appear on the screen asking if you want to install the addons, you have to click on yes and reboot. The resolution should now change automatically, but if it doesn’t, just go to the control panel and screen settings: the dropdown will now be enabled. Install the VirtualBox Guest Additions apt-get install virtualbox-guest-dkms As you can see from the image, the actually screen in the VirtualBox doesnt completely fill to the edge of the actual screen. To change the displayed resolution at will, proceed as follows: If not possible, close the Virtualbox window for the VM with the Power Off option set. Step 9: Now you have to change the Display setting on VirtualBox, Go to File > Preferences > Display, and from the drop-down menu select Hint. Run until you see the problem happen, then shut down the VM from within the VM OS if possible. Now, you need to go to View Full-screen Mode or press Right Ctrl + F (Right Ctrl is the default host key) to open the VirtualBox VM in full screen on your.
My solution was simpler than I had anticipated. I tried installing the aforementioned packages but had no luck. You will have also noticed that going on the screen settings it is not possible to change this resolution from the dropdown. Feb 2021, 16:28 Start the VM from full power off, not save-state. 11 Answers Sorted by: 40 I had this problem as well running a newly installed version of VirtualBox (VirtualBox 6.0). If you have installed Ubuntu Linux in a virtual machine on VirtualBox you will surely realize that by default its resolution is set to 640×480, very poor for any type of use.
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