I tried updating to 15.04 and while booting, it failed midstream. Last thing it says is "Started LSB: Tool to automatically collect and submit kernal crash signatures....ut down.."
In February I got a Republic of Gamers motherboard (Maximus VII Hero). Boot would fail 1 of 5 times, but it would generally work the second time. After updating, it won't boot at all.
Any clues would be really helpful...
Dan