I want to shrink my second (LVM) partition, in order to create a new partition in the newly freed space. I am using the Live CD to do so, because I know I can't resize/move this partition while it is in use. When I opened GParted in the Live CD, I realized that I could not resize the partition, because when I right-click it, the option "resize/move" is disabled.
I tried to unmount it, to "lazy" unmount it (
umount -l /dev/sda2) but it didn't work.
A screenshot from GParted: