VirtualBox + Guest Additional Disk

[vbabko]

Hello, All.
I am need some help.

I installed Ubuntu 14.04 on VirtualBox (Lesson 1. Learn the Essentials of creating uBoot, Linux and YOCTO for a board) , but after installing Guest Additional Disk, I could no longer log into Ubuntu. Constantly throws into the login window.
Does anyone know what the problem is and how to solve it?
My hardware :
i5-2400, 8Gb RAM, Asus P8P67-M, Windows 10 Pro
Video:

https://www.dropbox.com/s/pd6zxjrmfokv9w2/Video_2018-02-27_220539.wmv?dl=0

P.S. I tried to do all this with an even older machine - everything was installed there without problems

[robertferanec]

vbabko, I think, once I had similar problem. I do not know if it is same, but try something like this (it was problem with graphics settings): https://askubuntu.com/questions/9829...ution-too-high

[vbabko]

No, I did not have a black screen, but I still got into the video settings of the virtual machine and tried to change them.
Oddly enough the problem disappeared after the tick was removed "Enable 3D Acceleration"

[robertferanec]

Awesome So it works now?

[vbabko]

Yes.
Thanks for the quick response.
Although he did not respond to my problem directly but gave the right direction for his thoughts