Comment 84 for bug 1386005

I am running Ubuntu 16.04 LTS on a Dell I5555 with a radeon card. This started happening after a few successful boots in graphics mode. I suspect, although I am not sure, that it started after I needed to install an extra library for a package that I had installed. But BEFORE that, in order for the system to boot at all, I had to enter the "nomodeset" option in /etc/default/grub . Without that it did not let me get past the point where it complained about the lack of UMS support on my radeon graphics module. Removing the "splash" option helped me to then enter the encryption password and boot in text mode. The extra installations that I needed to do, which may have broken the boot [i.e., my ability to enter the encryption key password in graphics mode] are: the libicu52 library, which, in turn, required xcb - and that then wanted xcb-proto . It may be worth checking what these graphics libraries do to influence a boot in graphics mode.