This seems to be caused by Focal's 5.4 kernel: after booting Ubuntu 19.10's linux-image-5.3.0-40-generic (5.3.0-40.32), which remained on the system after upgrading to 20.04, hibernate-disk (and resume afterwards) works fine.
** Also affects: linux-5.4 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-5.4 in Ubuntu. https://bugs.launchpad.net/bugs/1866984 Title: linux-5.4 regression: hibernate-disk resumes instantly Status in hibernate package in Ubuntu: Confirmed Status in linux-5.4 package in Ubuntu: New Bug description: Since upgrading from 19.10 (eoan) to 20.04 (focal), hibernate-disk fails to properly hibernate and shutdown the system; instead, Ubuntu resumes instantly. $ sudo hibernate-disk [sudo] password for xyz: hibernate-disk:Warning: Tuxonice binary signature file not found. $ (Note that this warning has been there earlier and is presumably not associated with this bug.) Expected: Switch to console, memory-page writeout progress indication, poweroff Observed: Switch to console, very quickly switch back to X11 Excerpt from dmesg: [ 418.377514] usbcore: deregistering interface driver uvcvideo [ 419.227465] Filesystems sync: 0.006 seconds [ 419.227468] Freezing user space processes ... (elapsed 0.002 seconds) done. [ 419.229889] OOM killer disabled. [ 419.230429] PM: Marking nosave pages: [mem 0x00000000-0x00000fff] [ 419.230432] PM: Marking nosave pages: [mem 0x0009d000-0x000fffff] [ 419.230440] PM: Marking nosave pages: [mem 0x99438000-0xffffffff] [ 419.233760] PM: Basic memory bitmaps created [ 419.234176] PM: Preallocating image memory... done (allocated 1188843 pages) [ 420.040021] PM: Allocated 4755372 kbytes in 0.80 seconds (5944.21 MB/s) [ 420.040021] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done. [ 420.041324] printk: Suspending console(s) (use no_console_suspend to debug) [ 420.041755] wlp3s0: deauthenticating from cc:ce:1e:61:2e:d0 by local choice (Reason: 3=DEAUTH_LEAVING) [ 421.278599] ACPI: EC: interrupt blocked [ 421.297107] ACPI: Preparing to enter system sleep state S4 [ 421.301832] ACPI: EC: event blocked [ 421.301833] ACPI: EC: EC stopped [ 421.301834] PM: Saving platform NVS memory [ 421.302557] Disabling non-boot CPUs ... [ 421.303996] smpboot: CPU 1 is now offline [ 421.307624] smpboot: CPU 2 is now offline [ 421.309904] IRQ 129: no longer affine to CPU3 [ 421.310921] smpboot: CPU 3 is now offline [ 421.314818] smpboot: CPU 4 is now offline [ 421.317033] IRQ 16: no longer affine to CPU5 [ 421.317040] IRQ 132: no longer affine to CPU5 [ 421.318049] smpboot: CPU 5 is now offline [ 421.320365] IRQ 126: no longer affine to CPU6 [ 421.320373] IRQ 130: no longer affine to CPU6 [ 421.321405] smpboot: CPU 6 is now offline [ 421.325743] smpboot: CPU 7 is now offline [ 421.330059] PM: Creating hibernation image: [ 422.045974] PM: Need to copy 1182218 pages [ 422.045977] PM: Normal pages needed: 1182218 + 1024, available pages: 7053219 [ 423.427947] PM: Hibernation image created (1182218 pages copied) [ 421.330504] PM: Restoring platform NVS memory [ 421.330638] ACPI: EC: EC started [ 421.331412] Enabling non-boot CPUs ... [ 421.331453] x86: Booting SMP configuration: [ 421.331454] smpboot: Booting Node 0 Processor 1 APIC 0x2 [ 421.332297] CPU1 is up [ 421.332327] smpboot: Booting Node 0 Processor 2 APIC 0x4 [ 421.333137] CPU2 is up [ 421.333164] smpboot: Booting Node 0 Processor 3 APIC 0x6 [ 421.333987] CPU3 is up [ 421.334013] smpboot: Booting Node 0 Processor 4 APIC 0x1 [ 421.334926] CPU4 is up [ 421.334956] smpboot: Booting Node 0 Processor 5 APIC 0x3 [ 421.335640] CPU5 is up [ 421.335666] smpboot: Booting Node 0 Processor 6 APIC 0x5 [ 421.336447] CPU6 is up [ 421.336469] smpboot: Booting Node 0 Processor 7 APIC 0x7 [ 421.337232] CPU7 is up [ 421.340095] ACPI: Waking up from system sleep state S4 [ 421.347884] ACPI: EC: interrupt unblocked [ 421.390488] ACPI: EC: event unblocked [ 421.391425] tpm tpm0: tpm_try_transmit: send(): error -5 [ 421.403775] iwlwifi 0000:03:00.0: Applying debug destination EXTERNAL_DRAM [ 421.553049] iwlwifi 0000:03:00.0: Applying debug destination EXTERNAL_DRAM [ 421.603306] [drm] Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS. [ 421.634367] iwlwifi 0000:03:00.0: FW already configured (0) - re-configuring [ 421.714565] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300) [ 421.715010] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded [ 421.715012] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out [ 421.715083] ata1.00: ACPI cmd ef/10:09:00:00:00:a0 (SET FEATURES) succeeded [ 421.715396] ata1.00: supports DRM functions and may not be fully accessible [ 421.716087] ata1.00: disabling queued TRIM support [ 421.718110] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded [ 421.718112] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out [ 421.718178] ata1.00: ACPI cmd ef/10:09:00:00:00:a0 (SET FEATURES) succeeded [ 421.718400] ata1.00: supports DRM functions and may not be fully accessible [ 421.718987] ata1.00: disabling queued TRIM support ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: hibernate 2.0+15+g88d54a8-1 ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18 Uname: Linux 5.4.0-14-generic x86_64 ApportVersion: 2.20.11-0ubuntu19 Architecture: amd64 CurrentDesktop: KDE Date: Wed Mar 11 11:55:21 2020 InstallationDate: Installed on 2016-11-26 (1200 days ago) InstallationMedia: Kubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.1) PackageArchitecture: all SourcePackage: hibernate UpgradeStatus: Upgraded to focal on 2020-03-06 (5 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/hibernate/+bug/1866984/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp