I came across this bug report after experiencing the same problem and wanted to ensure anyone who finds this uses the correct command in case it's not obvious.
It should be... echo "RESUME=/dev/mapper/<vg>-<lv>" > /etc/initramfs-tools/conf.d/resume thanks -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
