Install was successful but system enters grub prompt

atsol

I am on a Dell Precision M4700 with its standard disk as sda and an extra SSD as sdb. The disk sda is /home. System gets installed in sdb. Bootloader in sda (as proposed by cnchi). Installation finishes, informs that grub was successfully installed and asks for reboot. So I say
OK, reboot, but shutdown never finishes, it gets stuck. If I forcefully power down the machine then on boot I am left with the grub prompt.
On the Bios level, I have Legacy bios enabled (uefi disabled) and my system only holds this installation (no Windows or anything else).

Is such an issue known? Thanks.

robgriff444

@atsol There is at least one current issue this could be so is there an error message on the grub screen? Can you type anything? Can you switch to a TTY (Ctrl-alt-F2)?

joekamprad

@atsol why you are choosing to use legacy instead of more modern uefi?

manuel

@atsol
To have a better picture of the issues, could you show the output of these terminal commands:

sudo fdisk -l
lsblk -fm

e.g. by booting the USB installer stick?