RHEL7 on VirtualBox graphics controller

I have a RHEL7 VM on VirtualBox 6.0 which crashed right after a full update to RHEL 7.7, including kernel. Just typed "startx" (I usually make VMs boot into console), and it crashed immediately with a "Guru Meditation" from VirtualBox.

Taking a stab, I changed the Graphics Controller for the VM from VMSVGA to VBoxVGA, and it launched the GUI just fine.

Missing Adobe fonts

If you try to start up remote X11 application to display on your Ubuntu machine, and get errors complaining about missing fonts like:

-adobe-helvetica-medium-r-*-*-10-*-*-*-*-*-iso8859-1

here's how to fix it.

You have to install not just fonts, but also the font server. First, the font server:

sudo apt-get install xfs xfstt 

and the fonts:

sudo apt-get install t1-xfree86-nonfree ttf-xfree86-nonfree ttf-xfree86-nonfree-syriac xfonts-75dpi xfonts-100dpi

And then, restart X11 on your Ubuntu machine, or just reboot.