I have seen this for some time (perhaps since install) on F28. I
suspend to ram and the system seems to suspend then immediately restarts
by itself. I unlock and suspend again and this 2nd attempt 'takes'.
It seems this happens one the 1st suspend after a powerup and login. I
don't believe I see it on later suspends.
LOTS of log messages I will provide a few. Trying to find some of the
failure to suspend
...
Jul 16 10:41:10 lx121e systemd[1]: Reached target Sleep.
Jul 16 10:41:10 lx121e systemd[1]: Starting Suspend...
Jul 16 10:41:11 lx121e systemd-sleep[3896]: Suspending system...
Jul 16 10:41:11 lx121e kernel: PM: suspend entry (deep)
Jul 16 10:41:11 lx121e kernel: PM: Syncing filesystems ... done.
Jul 16 10:41:11 lx121e nm-dispatcher[3879]: req:2 'down' [wlp4s0]: start
running ordered scripts...
Jul 16 10:41:11 lx121e chronyd[611]: Source 107.155.72.138 offline
Jul 16 10:41:11 lx121e chronyd[611]: Source 193.225.118.163 offline
Jul 16 10:41:11 lx121e chronyd[611]: Source 2001:470:28:140::5 offline
Jul 16 10:41:11 lx121e chronyd[611]: Source 206.108.0.131 offline
Jul 16 10:41:11 lx121e chronyd[611]: Source 62.149.0.30 offline
Jul 16 10:41:11 lx121e chronyd[611]: Source 80.65.85.94 offline
Jul 16 10:41:11 lx121e chronyd[611]: Source 198.206.133.14 offline
Jul 16 10:41:11 lx121e chronyd[611]: Can't synchronise: no selectable
sources
Jul 16 10:41:18 lx121e kernel: Freezing user space processes ...
(elapsed 0.006 seconds) done.
Jul 16 10:41:18 lx121e kernel: OOM killer disabled.
Jul 16 10:41:18 lx121e kernel: Freezing remaining freezable tasks ...
(elapsed 0.052 seconds) done.
Jul 16 10:41:18 lx121e kernel: Suspending console(s) (use
no_console_suspend to debug)
Jul 16 10:41:18 lx121e kernel: sd 0:0:0:0: [sda] Synchronizing SCSI cache
Jul 16 10:41:18 lx121e kernel: sd 0:0:0:0: [sda] Stopping disk
Jul 16 10:41:18 lx121e kernel: PM: suspend devices took 2.354 seconds
...
Jul 16 10:41:44 lx121e systemd[1]: Reached target Sleep.
Jul 16 10:41:44 lx121e systemd[1]: Starting Suspend...
Jul 16 10:41:44 lx121e systemd-sleep[4194]: Suspending system...
Jul 16 10:41:44 lx121e kernel: PM: suspend entry (deep)
Jul 16 10:41:44 lx121e kernel: PM: Syncing filesystems ... done.
Jul 16 10:41:45 lx121e chronyd[611]: Source 107.155.72.138 offline
Jul 16 10:41:45 lx121e chronyd[611]: Source 193.225.118.163 offline
Jul 16 10:41:45 lx121e chronyd[611]: Source 198.206.133.14 offline
Jul 16 10:41:45 lx121e chronyd[611]: Source 2001:470:28:140::5 offline
Jul 16 10:41:45 lx121e chronyd[611]: Source 206.108.0.131 offline
Jul 16 10:41:45 lx121e chronyd[611]: Source 62.149.0.30 offline
Jul 16 10:41:45 lx121e chronyd[611]: Source 80.65.85.94 offline
...
Jul 16 10:43:28 lx121e kernel: Freezing user space processes ...
(elapsed 0.005 seconds) done.
Jul 16 10:43:28 lx121e kernel: OOM killer disabled.
Jul 16 10:43:28 lx121e kernel: Freezing remaining freezable tasks ...
(elapsed 0.079 seconds) done.
Jul 16 10:43:28 lx121e kernel: Suspending console(s) (use
no_console_suspend to debug)
Jul 16 10:43:28 lx121e kernel: sd 0:0:0:0: [sda] Synchronizing SCSI cache
Jul 16 10:43:28 lx121e kernel: sd 0:0:0:0: [sda] Stopping disk
Jul 16 10:43:28 lx121e kernel: PM: suspend devices took 0.805 seconds
...
Jul 16 10:43:28 lx121e kernel: x86: Booting SMP configuration:
Jul 16 10:43:28 lx121e kernel: smpboot: Booting Node 0 Processor 1 APIC 0x1
Jul 16 10:43:28 lx121e kernel: cache: parent cpu1 should not be sleeping
Jul 16 10:43:28 lx121e kernel: microcode: CPU1: patch_level=0x05000029
Jul 16 10:43:28 lx121e kernel: CPU1 is up
Jul 16 10:43:28 lx121e kernel: ACPI: Waking up from system sleep state S3
Jul 16 10:43:28 lx121e kernel: ACPI: EC: interrupt unblocked
...
Jul 16 10:43:28 lx121e kernel: Freezing user space processes ...
(elapsed 0.005 seconds) done.
Jul 16 10:43:28 lx121e kernel: OOM killer disabled.
Jul 16 10:43:28 lx121e kernel: Freezing remaining freezable tasks ...
(elapsed 0.079 seconds) done.
Jul 16 10:43:28 lx121e kernel: Suspending console(s) (use
no_console_suspend to debug)
Jul 16 10:43:28 lx121e kernel: sd 0:0:0:0: [sda] Synchronizing SCSI cache
Jul 16 10:43:28 lx121e kernel: sd 0:0:0:0: [sda] Stopping disk
Jul 16 10:43:28 lx121e kernel: PM: suspend devices took 0.805 seconds
Jul 16 10:43:28 lx121e kernel: ACPI: EC: interrupt blocked
Jul 16 10:43:28 lx121e kernel: ACPI: Preparing to enter system sleep
state S3
Jul 16 10:43:28 lx121e kernel: ACPI: EC: event blocked
more messages available upon request.
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