When I first installed Ubuntu Studio 14.04 a few months ago, I chose the option for the disk to be encrypted. I have had two issues since then that I believe have to do with it.
For a while every time I booted up, my screen went dead after BIOS finished loading, and the only way to get out of that was to press Escape - no other key, only ESC worked. Then boot-up proceeded just fine.
After replacing my graphics driver with one from Nvidia that problem was replaced with the USB keyboard not being loaded when I have to enter the password for the encryption program. Now I keep a standard keyboard connected just to enter that, and afterwards switch to the wireless USB keyboard.
I would prefer to keep the disk encryption - as much because I would rather not have to reinstall Ubuntu as because I find it reassuring. Is there anything I can do about the keyboard problem?
I included a description of the previous dead-screen problem in case that gives a clue what is going on. I asked about that here at Ask.SE at the time and got help for it.
Edit: My machine has only the Ubuntu OS on it, nothing else. It does have two old drives on it that I have never been able to mount and just left... could that be a factor?