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I've installed Ubuntu 14.04 LTS in an Oracle VM Virtualbox on an HP Pavilion laptop. When I start it, I get a logon screen, but when I logon it just hangs with a blank purple screen.

I tried the advice at http://turriebuntu.wordpress.com/general-ubuntu-pages/ubuntu-boot-freeze-lockup-it-stops-with-a-blank-purple-or-black-screen/ -- intercepted the boot sequence and entered nomodeset but it made no difference (although that was for a different version, and I suspect getting to the logon screen means I'd already got past that point).

What's a Linux/Ubuntu novice to do to actually get into Ubuntu?

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What version of VirtualBox are you running? What host OS? Try upgrading VirtualBox, or the GPU driver on your host OS, or enable/disable 3D acceleration in the VM settings. –  bain Jun 19 '14 at 9:43
@bain: enabling 3D acceleration fixed it for me, thanks ! –  conradk Apr 1 at 19:13

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