Yes, this was an overlooked mismerge from Debian which dropped this
special casing from the 'init' implementation, but is still needed in
Ubuntu because our resume implementation diverges from Debian's.
This fix has been uploaded to the queue and should be accepted after the
20.04 beta freeze ends.
** Changed in: initramfs-tools (Ubuntu)
Status: New => In Progress
** Changed in: initramfs-tools (Ubuntu)
Assignee: (unassigned) => Steve Langasek (vorlon)
** Changed in: initramfs-tools (Ubuntu)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1869996
Title:
Hibernation can NOT work due to incorrect RESUME=
Status in initramfs-tools package in Ubuntu:
Fix Committed
Status in linux-azure package in Ubuntu:
New
Bug description:
In Ubuntu 18.04 I have the below 4 lines, but in Ubuntu 20.04 (dev
build) these lines are missing:
--- /usr/share/initramfs-tools/init 2020-04-01 01:15:20.533208700 +0000
+++ /usr/share/initramfs-tools/init 2020-04-01 00:59:43.931655200 +0000
@@ -163,6 +163,10 @@
;;
resume=*)
RESUME="${x#resume=}"
+ case $RESUME in
+ UUID=*)
+ RESUME="/dev/disk/by-uuid/${RESUME#UUID=}"
+ esac
;;
resume_offset=*)
resume_offset="${x#resume_offset=}"
As a result, hibernation can not work: the saved state in the swap
partition is lost and no resume happens.
The issue is: when I use the "resume=UUID=533b2cd9-31ac-449b-82ff-
014f09ab0a9c" kernel parameter for hibernation, due to the missing
lines, the variable 'resume' in a later place in "/usr/share
/initramfs-tools/init" is set to "UUID=533b2cd9-31ac-449b-82ff-
014f09ab0a9c" rather than "/dev/disk/by-uuid/533b2cd9-31ac-449b-82ff-
014f09ab0a9c". Next, in /usr/share/initramfs-tools/scripts/local-
premount/resume:
DEV=$(readlink "$resume")
DEV=/sys/class/block/${DEV##*/}/dev
if [ -r "$DEV" ]; then
read -r MAJMIN < "$DEV"
fi
if [ -z "$MAJMIN" ]; then
exit 1
fi
Here the 'readlink' will fail, so $DEV is not pointing to a valid device, and
then $MAJMIN is empty and
we "exit 1", so no resume can happen!
Not sure why the 4 lines are removed in Ubuntu 20.04...
PS, this is my version info:
root@localhost:~# dpkg-query -s initramfs-tools-core
Package: initramfs-tools-core
Status: install ok installed
Priority: optional
Section: utils
Installed-Size: 271
Maintainer: Ubuntu Developers <ubuntu-devel-disc...@lists.ubuntu.com>
Architecture: all
Multi-Arch: foreign
Source: initramfs-tools
Version: 0.136ubuntu1
Replaces: initramfs-tools (<< 0.121~)
Depends: busybox-initramfs (>= 1:1.30.1-4ubuntu5~), initramfs-tools-bin (=
0.136ubuntu1), klibc-utils (>= 2.0.4-8~), cpio (>= 2.12), lz4, kmod, udev,
coreutils (>= 8.24), logsave | e2fsprogs (<< 1.45.3-1~)
Suggests: bash-completion
Breaks: busybox-initramfs (<< 1:1.30.1-4ubuntu5~), initramfs-tools (<< 0.121~)
Conffiles:
/etc/initramfs-tools/initramfs.conf 4ec999d424d01b9ca685e65ba0f22a13
Description: generic modular initramfs generator (core tools)
This package contains the mkinitramfs program that can be used to
create a bootable initramfs for a Linux kernel. The initramfs should
be loaded along with the kernel and is then responsible for mounting
the root filesystem and starting the main init system.
Original-Maintainer: Debian kernel team <debian-ker...@lists.debian.org>
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