Comment 87 for bug 1768230

Well, if you're a LVM user i recommend to leave ubuntu/debian. I know this sounds somewhat hard, but this nasty bug inside the ramdisk mouning script exist now more or less since a year! I can't accept a 30 seconds delay on boot for nothing and moved on to other distros.
Yes you can fix it inside the script which will be copied, but with a new package the file will be overwritten without any warning or save/new file.

Time to untrack this bug now. Good luck!