Comment 22 for bug 1705748

One curious thing I note, probably irrelevant, is that after resume, there is lots of stuff recorded in the logs that seem to be about suspending...... e.g. Freezing remaing tasks after the computer has resumed...

ul 25 01:42:58 phs08 systemd[1]: Reached target Sleep.
Jul 25 01:42:58 phs08 systemd[1]: Starting Suspend...
Jul 25 01:42:58 phs08 systemd-sleep[5315]: Failed to connect to non-global ctrl_ifname: (nil) error: No such file or directory
Jul 25 01:42:58 phs08 systemd-sleep[5316]: /lib/systemd/system-sleep/wpasupplicant failed with error code 255.
Jul 25 01:42:58 phs08 systemd-sleep[5315]: Suspending system...

System is now sleeping, system wakes....

Jul 25 01:43:33 phs08 kernel: [ 735.437613] PM: Syncing filesystems ... done.
Jul 25 01:43:33 phs08 kernel: [ 735.469300] PM: Preparing system for sleep (mem)
Jul 25 01:43:33 phs08 kernel: [ 735.469480] Freezing user space processes ... (elapsed 0.002 seconds) done.
Jul 25 01:43:33 phs08 kernel: [ 735.471929] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
Jul 25 01:43:33 phs08 kernel: [ 735.473849] PM: Suspending system (mem)
Jul 25 01:43:33 phs08 kernel: [ 735.473869] Suspending console(s) (use no_console_suspend to debug)
Jul 25 01:43:33 phs08 kernel: [ 735.474317] sd 1:0:0:0: [sdb] Synchronizing SCSI cache
Jul 25 01:43:33 phs08 kernel: [ 735.474394] sd 1:0:0:0: [sdb] Stopping disk
Jul 25 01:43:33 phs08 kernel: [ 735.474620] sd 0:0:0:0: [sda] Synchronizing SCSI cache
Jul 25 01:43:33 phs08 kernel: [ 735.482777] sd 0:0:0:0: [sda] Stopping disk
Jul 25 01:43:33 phs08 kernel: [ 735.483625] i8042 kbd 00:04: System wakeup enabled by ACPI
Jul 25 01:43:33 phs08 kernel: [ 735.483765] nouveau 0000:27:00.0: DRM: suspending console...
Jul 25 01:43:33 phs08 kernel: [ 735.483771] nouveau 0000:27:00.0: DRM: suspending display...
Jul 25 01:43:33 phs08 kernel: [ 735.505047] nouveau 0000:27:00.0: DRM: evicting buffers...
Jul 25 01:43:33 phs08 kernel: [ 735.580082] nouveau 0000:27:00.0: DRM: waiting for kernel channels to go idle...
Jul 25 01:43:33 phs08 kernel: [ 735.580105] nouveau 0000:27:00.0: DRM: suspending fence...
Jul 25 01:43:33 phs08 kernel: [ 735.581462] nouveau 0000:27:00.0: DRM: suspending object tree...
Jul 25 01:43:33 phs08 kernel: [ 737.956791] PM: suspend of devices complete after 2482.515 msecs
Jul 25 01:43:33 phs08 kernel: [ 737.957846] PM: late suspend of devices complete after 1.050 msecs
Jul 25 01:43:33 phs08 kernel: [ 737.958651] xhci_hcd 0000:28:00.3: System wakeup enabled by ACPI
Jul 25 01:43:33 phs08 kernel: [ 737.959028] xhci_hcd 0000:22:00.0: System wakeup enabled by ACPI
Jul 25 01:43:33 phs08 kernel: [ 737.959043] r8169 0000:25:00.0: System wakeup enabled by ACPI
Jul 25 01:43:33 phs08 kernel: [ 737.959044] xhci_hcd 0000:03:00.0: System wakeup enabled by ACPI
Jul 25 01:43:33 phs08 kernel: [ 743.441059] PM: noirq suspend of devices complete after 5482.825 msecs
Jul 25 01:43:33 phs08 kernel: [ 743.441087] ACPI: Preparing to enter system sleep state S3
Jul 25 01:43:33 phs08 kernel: [ 743.761477] PM: Saving platform NVS memory
Jul 25 01:43:33 phs08 kernel: [ 743.761495] Disabling non-boot CPUs ...