Ubuntu login takes 15 seconds, "I/O error dev fd0 sector 0"

Login to your system as you would normally do. Press alt+f2 . Type: sudo gedit /etc/fstab .

Here, you should see a line with /dev/fd0 . Put a # to the beginning of that line, save the file, do a reboot.

For example it looks like this:
/dev/fd0 /media/floppy0 auto rw,users,noauto 0 0

Make it look like this:
#/dev/fd0 /media/floppy0 auto rw,users,noauto 0 0

---

Let's disable the floppy then. Alt+f2 , sudo gedit /etc/modprobe.d/blacklist.conf .

Start a new line with:
blacklist floppy

Reboot.