Xubuntu 14.04.1 amd64 guest crashes on OS X 10.10.1 host, VirtualBox 4.3.20 r96996

[thomaslc]

Xubuntu 14.04.1 amd64 guest will boot and run, but eventually crashes (the amount of time the vm will run before crashing varies) an OS X 10.10.1 host running VB 4.3.20 r96996. Same behavior running the 4.3.21 r97018. Same behavior after building new Xubuntu 14.04.1 amd64 VMs (applying all Xubuntu updates, installing dkms, installing guest additons). One aspect of my setup that may be unique compared to other users is that I have an external USB drive that contains my Xubuntu account's home directory. My setup (OS X host, VB, Xubuntu guest, externa USB drive) ran reliably till recently. I was running OS X 10.9 on the host and Xubuntu 12.04 amd64 on the guest until one or two weeks ago; I'm guessing at the version number, but I started having problems with VB 4.3.10 or maybe one of the last few releases of 4.2.X. Thought my old external USB drive was going bad so I replaced that but had the same behavior: VM hung sporadically. Updated OS X on the host and Xubuntu on the guest with the result that the VM hangs more frequently.

[thomaslc]

VB log file for Xubuntu VM saved after crash

[Frank Mehnert]

Can you provide a core dump?

[aeichner]

Please reopen if still relevant with a recent VirtualBox release.