If changed the solution via Grub Customizer, simply click on “Save” button. Without running command, you can also set it via Grub Customizer under its ‘Appearance settings’ page. Multiple resolutions can be specified, the default is auto. Next set a screen resolution by changing value of “GRUB_GFXMODE”. Now boot into Ubuntu, open terminal from system app launcher, and run command to edit the Grub configuration file: sudo gedit /etc/default/grub Take a picture of the output, or write down your desired resolution, e.g., 1024x768xx1024x32.Ģ.) Set a custom screen resolution for Grub boot menu: Now run the Guest Addition setup again: sudo rcvboxadd setup Using VirtualBox Guest Addition features. Next run command videoinfo to list supported video modes. Just to clarify, you need to run these commands in the virtual Ubuntu system: sudo apt install build-essential dkms linux-headers-generic. When you’re at Grub boot-menu, press c to get into command console. You can try it by opening terminal (Ctrl+Alt+T) and run command: sudo apt install hwinfo & hwinfo -framebufferī.) If howinfo does not work, use videoinfo instead which however runs in Grub command console.įirstly restart your machine. The font size of startup boot menu is too small or too large? It’s easy to fix by setting an appropriate screen resolution for the Grub boot-menu in Ubuntu.ġ.) Tell which video modes your graphics card support.īefore starting to configure the Grub bootloader, you firstly need to know which video modes are supported.Ī.) The hwinfo command has an option to display the information.
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