I had to update my xubuntu install to xubuntu 16 recently, as 15 is not longer supported. Running through the do-release-upgrade without any error I unfortunately ended up with a black screen after rebooting. This seem to be a persistent problem, as it survived several reboots. Not using the NVIDIA driver wasn’t an option either, as it was killing my 3 monitor setup. Searching google/duckduckgo brought the tip to add “nomodeset” to the kernel boot options. So fire up vim /etc/defaults/grub and add “nomodeset” to “GRUB_CMDLINE_LINUX_DEFAULT”. Save it, run “update-grub” and hope for the reboot…
No luck for me.. I do no longer got a black screen but a awkward zoomed splash screen without the ability to enter my full-disk encrytion password. At this point in time my “GRUB_CMDLINE_LINUX_DEFAULT” looked like this:
But to be honest, how needs a splash screen and why booting quite if you have issues to fix. So I removed all three parameters, run “update-grub” again and rebooted.
Issue solved, got my verbose boot, the ability to enter my full-disk encryption password and use the NVIDIA driver which gave me my three screens back. Successfull config in the end: