I am using the minimum install of CentOS 7 with command line access only (no graphic support installed).
After spending hours reading online about editing grub files, installing guest additions, and setting VB options, absolutely nothing is working for me.
First, guest additions is installed. Secondly, the only grub file I have is /boot/grub2/grub.cfg, and it says not to edit it as it's dynamically generated. Finally, editing the Display under VB's > Machine > settings to automatic, none, or hint with the resolution I want does not make a difference.
Step by step, what exactly do I have to do in order to get my screen resolution to be larger than 640 x 400 as well as provide for a buffer (currently there is no buffer)?