Installing Ubuntu 32-bit In VirtualBox
For some time I have been unable to install in VirtualBox any 32-bit version of Ubuntu 16.04.x. I tried Ubuntu MATE, Ubuntu, and Xubuntu. For me the problem began after the official 16.04 release. I had no problems booting and installing in VirtualBox the 16.04 beta versions. I am able to install the 16.04.x 64-bit version in VirtualBox.
The disk ISO always boots fine. When X starts there is a second or two when the screen display resizes as expected to the usual default 1024x768. Then the screen abruptly corrupts to 1152x400 and is unusable.
Seems the symptoms vary among people experiencing this problem.
The work-around is funky but straightforward. After the display corrupts, toggle the guest virtual machine (VM) virtual displays.
The common advice found on the web is to press
Host_Key+F1 then return to the X desktop with
Host_Key+F7. That keyboard shortcut combination fails with 16.04 because 16.04 uses systemd. With systemd the X environment boots on the same virtual console (tty1). Therefore, the trick is to press
Host_Key+F[2|3|4|5|6] and then return to X with
Host_Key+F1. The first toggle can be any virtual console other than F1.
Yet Another WTF Moment. Virtualization is now standard and common. I am lost how this kind of bug gets past quality assurance testers.