VM doesn't take up full-screen on start-up, but...

[JeWu]

The problem is inconsistency. To further explain:

I boot up my Linux Mint 18 VM, the machine boots up properly, and I am directed to the start/login screen.

The issue at this step is that even though I have my window set to fill the entire screen (via ctrl+f), the screen only takes up a small box of the screen—leaving the rest of the screen to be filed by black "borders".

What happens after I successfully login is that the screen then and only then readjusts itself. It is not an issue with the guest additions as I already have them configured.

So, you might be thinking: "well, it's only in the logon screen, right? What's the big deal?"

The "big" deal is that it's inconsistent.

Got a similar issue here, too.


VirtualBox 5.1.22 + ExtPack

Host:
Fujitsu A556A (Laptop)
DualCore i5 6200U, 8 GB RAM, 256 GB SDD
Internal Intel GFX only

VM:
Mint Mate 18.1, Kernel 4.10.20
2 CPU, 4 GB RAM, Execution Cap: 80%
I/O APIC (on), PAE/NX (on)
ParaVirt Interface: default
Hardware Virt: VT-x/AMD-V (on), Nested Paging (on)
VideoMemory: 128 MB
Acceleration: 3D (on), 2D (off)