VirtualBox Graphics Corruption
Today I was setting up a VirtualBox instance to run Linux Mint 19 in a Linux Mint 19 host. After boot, I was greeted with an unreadable graphics issue.
Turns out sometimes VirtualBox, when running on Linux based hosts, will exhibit a screen buffer corruption in the guest when first starting. The solution, found on StackOverflow, is triggering a kernel graphics buffer refresh.
F1(you will see the shell) and then
F7. Depending on the Virtualbox configuration use Left Ctrl+Alt together instead of Right Ctrl.
This works by forcing the kernel's graphics buffer / X / XRandR to re-detect the monitor and display in the proper resolution.
F1 and equivalent
F7 would switch a Linux system from the Gui->TTY Text Console->Gui. In the above case, we use the VirtualBox host key,
Right Ctrl to trigger this process in the guest.
This is one of those posts for my own documentation.