** Description changed:
+ [impact]
+
+ unable to resume from hibernation when resume= boot param is specified
+ as device path
+
+ [test case]
+
+ set up device/partition for swap, e.g. /dev/vda2
+
+ add 'resume=/dev/vda2' kernel boot parameter
+
+ hibernate
+
+ power system back on; it should resume from /dev/vda2 instead of
+ coldboot
+
+ [regression potential]
+
+ any regression would likely result in failure to correctly resume from
+ hibernation, incorrectly attempting to resume from hibernation, or
+ failing to resume from hibernation.
+
+ [scope]
+
+ this is needed in b/f/g/h
+
+ this bug was introduced, ironically, by bug 1644975, which was added in
+ bionic, so this bug doesn't exist in xenial.
+
+ this code that introduced this bug isn't included in Debian, so no
+ change is needed there.
+
+ [original description]
+
I originally experienced this on Pop!_OS but I have reproduced it on a
freshly installed Ubuntu.
1. Ubuntu 20.04 LTS
2. initramfs-tools-core 0.136ubuntu6
3. I expect the system to resume from hibernation when running pm_hibernate
4. The system starts up anew when I try to resume
I have setup a swap partition on /dev/vda2 in /etc/fstab. To enable
hibernate I added the kernel parameter "resume=/dev/vda2" to
GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub and run update-grub.
From debugging initramfs it tries to follow a symbolic link
DEV=$(readlink "$resume")
(see /usr/share/initramfs-tools/scripts/local-premount/resume, line 35)
which works well when swap is specified with uuid. When swap is
specified as a device directly the readlink returns an empty string and
the system does not resume from hibernation.
To verify this I added the parameter -f to readlink and run "update-
initramfs -u". The system now hibernates successfully.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: initramfs-tools 0.136ubuntu6
ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
Uname: Linux 5.4.0-28-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun May 3 13:26:02 2020
InstallationDate: Installed on 2020-05-03 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
SourcePackage: initramfs-tools
UpgradeStatus: No upgrade log present (probably fresh install)
** Also affects: initramfs-tools (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: initramfs-tools (Ubuntu Hirsute)
Importance: Medium
Status: Confirmed
** Also affects: initramfs-tools (Ubuntu Groovy)
Importance: Undecided
Status: New
** Also affects: initramfs-tools (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: initramfs-tools (Ubuntu Hirsute)
Assignee: (unassigned) => Dan Streetman (ddstreet)
** Changed in: initramfs-tools (Ubuntu Groovy)
Assignee: (unassigned) => Dan Streetman (ddstreet)
** Changed in: initramfs-tools (Ubuntu Focal)
Assignee: (unassigned) => Dan Streetman (ddstreet)
** Changed in: initramfs-tools (Ubuntu Bionic)
Assignee: (unassigned) => Dan Streetman (ddstreet)
** Changed in: initramfs-tools (Ubuntu Groovy)
Importance: Undecided => Medium
** Changed in: initramfs-tools (Ubuntu Focal)
Importance: Undecided => Medium
** Changed in: initramfs-tools (Ubuntu Bionic)
Importance: Undecided => Medium
** Changed in: initramfs-tools (Ubuntu Bionic)
Status: New => In Progress
** Changed in: initramfs-tools (Ubuntu Focal)
Status: New => In Progress
** Changed in: initramfs-tools (Ubuntu Groovy)
Status: New => In Progress
** Changed in: initramfs-tools (Ubuntu Hirsute)
Status: Confirmed => In Progress
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https://bugs.launchpad.net/bugs/1876570
Title:
Could not resume from hibernation when swap is specified as device
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