Somehow, I have mysteriously acquired an additional swap partition. Actually it's a RAM drive designated for swap and when I do 'free' it shows as an additional 998MB added to my current swap of 4GB. This RAM drive is shown as /dev/zram0 by blkid. Nothing for it shows with fdisk -l. The only items listed for mount in my fstab is / and my normal swap partition. This unwanted and never created (by me) swap mounts at every boot. I have no idea where it came from, how it is getting mounted or why. What else besides fstab would possibly be controlling this? I really, really want to get rid of it.