I have the same issue after upgrade Ubuntu 14.04 -> Ubuntu 14.10.
I get black screen during boot.
Workaround: Alt+F1 (to get a screen with text cursor) and then Alt+F7. Then I can enter passphrase for my encrypted partition and continue in boot.
For me it's a regression in kernel 3.16 because it works with older kernel 3.13.
I have the same issue after upgrade Ubuntu 14.04 -> Ubuntu 14.10.
I get black screen during boot.
Workaround: Alt+F1 (to get a screen with text cursor) and then Alt+F7. Then I can enter passphrase for my encrypted partition and continue in boot.
For me it's a regression in kernel 3.16 because it works with older kernel 3.13.