Ubuntu Installation over USB and DVD fails

I managed to solve the issue for now: By pressing F6 (or, FN+F6 in my case) I could open an "extras" menu, where I had to select the option acpi=off. With that option, I was able to finally proceed the installation.

I had a similar problem (SQUASHFS error: sb_bread failed reading block) while using USB stick to install both ubuntu 16.04 and ubuntu 17.10 on Dell Inspiron 15R. However, My problem was with USB stick and was solved by changing the USB Stick.