> -----Original Message----- > From: Michael Biebl [mailto:bi...@debian.org] > Sent: Friday, July 6, 2018 9:53 AM > To: Limonciello, Mario; j...@kazbak.co.uk; 902...@bugs.debian.org > Subject: Re: Bug#902416: systemd: systemctl hibernate: unable to resume after > upgrade > > Am 06.07.2018 um 14:41 schrieb mario.limoncie...@dell.com: > > > Yes I could see two swap partitions causing the wrong one to be picked. > > It's trying to select the bigger of the two. > > > > If they don't match the one you're putting in > > /etc/initramfs-tools/conf.d/resume > > then that would cause problems. Please do confirm if you switch what's in > > initramfs conf.d/resume that the problem is fixed. > > If you have multiple swap partitions and you run > echo "disk" > /sys/power/state > which partition does the kernel use? >
Whichever one was configured in /sys/power/resume prior to running that command. The kernel can't know which one /to/ hibernate to unless it was configured in advance. Just like the initramfs can't know which one to resume /from/ unless it knew which one it resumed to. You can confirm which one the kernel is using by turning on debugging for hibernate and looking for this message: https://github.com/torvalds/linux/commit/648464076160ee7a4112d05eea13621790ab9d04#diff-4bc504812a6e5edefe9068b56aa3ddf0
