I upgraded Kubuntu from 12.10 to 13.04 via the do-release-upgrade command. However, the system won't boot anymore after that. When I start the computer, it will go past the BIOS screen (I checked the boot order and it is correct). However, after that it will just stay at a blank screen with a blinking cursor.
My system is an Acer AM3790-UR13P with an Intel i5 2320 and Intel HD Graphics. It has a SSD for all system folders and a HDD for the home folder.
I already read that there are problems with dual-boot system, but my system is a single-boot with Kubuntu only. I can't seem to be able to go into GRUB either (holding shift during booting gets me to the same screen).
Does anyone have an idea what to do?