Installer Stuck At "creating ext4 file system"

Question

Info: Ubuntu Livecd 15.10. The Screen where it's stuck at:

Disk Utility:

Solution

It happens to me all the time.

To solve this, I format concerned linux partitions ( Filesystem Partition 5 and Swap partition 6 in your case) from disk utility ie gnome-disks manually.

To do so you must select Try ubuntu instead of Install ubuntu after booting from bootable cd/usb.