I had Ubuntu 17.04 (no longer supported) in VirtualBox. After upgrading the VB guest additions to 5.2.6 from 5.2.4 it would only boot to a black screen.
I decided to reinstall Ubuntu from scratch. I installed 17.10. After installing the VB guest additions, the boot process hangs with the message
A start job is running for Hold until boot process finishes up (23s / no limit)
The system would only boot if I disable 3D acceleration for VirtualBox. But if I do that, the Ubuntu desktop is very slow.
Is there any way to get 17.10 running in VirtualBox 5.2.6 with good performance, like I could run 17.04?
The host is macOS 10.13.3, NVIDIA 750M graphics