The log looks a bit odd … There's "[e-suspend] Performing sleep operation 'suspend'...", followed by some binary blob apparently, displayed as a lot of "^@"s. Then, without even a newline, the reboot starts:
Jun 17 15:52:09 [polkitd] Registered Authentication Agent for unix-process:4421:775529 (system bus name :1.67 [/usr/bin/pkttyagent --notify-fd 6 --fallback], object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale de_DE.UTF-8)
Jun 17 15:52:09 [kernel] [ 7756.052284] elogind[1176]: The system will suspend now!
Jun 17 15:52:09 [e-suspend] Performing sleep operation 'suspend'...
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@Jun 17 15:53:00 [kernel] [ 0.000000] Linux version 6.15.2-artix1-1 (linux@artixlinux) (gcc (GCC) 15.1.1 20250425, GNU ld (GNU Binutils) 2.44.0) #1 SMP PREEMPT_DYNAMIC Wed, 11 Jun 2025 07:37:25 +0000
Jun 17 15:53:00 [kernel] [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=4a28eedc-9ccf-4ad1-8969-4c3ab0a2c7b8 rw loglevel=3 quiet
Jun 17 15:53:00 [kernel] [ 0.000000] x86/split lock detection: #AC: crashing the kernel on kernel split_locks and warning on user-space split_locks
Jun 17 15:53:00 [kernel] [ 0.000000] BIOS-provided physical RAM map:
Jun 17 15:53:00 [kernel] [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009dfff] usable
Jun 17 15:53:00 [kernel] [ 0.000000] BIOS-e820: [mem 0x000000000009e000-0x000000000009efff] reserved
Whereas a "echo mem > /sys/power/state" suspend and wakeup look like this:
Jun 17 16:04:03 [kernel] [ 673.840382] PM: suspend entry (s2idle)
Jun 17 16:04:03 [kernel] [ 673.842697] Filesystems sync: 0.002 seconds
Jun 17 16:04:08 [kernel] [ 673.855324] Freezing user space processes
Jun 17 16:04:08 [kernel] [ 673.858877] Freezing user space processes completed (elapsed 0.003 seconds)
Jun 17 16:04:08 [kernel] [ 673.858894] OOM killer disabled.
Jun 17 16:04:08 [kernel] [ 673.858897] Freezing remaining freezable tasks
Jun 17 16:04:08 [kernel] [ 673.860299] Freezing remaining freezable tasks completed (elapsed 0.001 seconds)
Jun 17 16:04:08 [kernel] [ 673.860309] printk: Suspending console(s) (use no_console_suspend to debug)
Jun 17 16:04:08 [kernel] [ 673.917286] serial 00:02: disabled
Jun 17 16:04:08 [kernel] [ 673.920198] serial 00:01: disabled
Jun 17 16:04:08 [kernel] [ 673.920375] r8169 0000:01:00.0 eth0: Link is Down
Jun 17 16:04:08 [kernel] [ 674.058688] ACPI: EC: interrupt blocked
Jun 17 16:04:08 [kernel] [ 679.021300] ACPI: EC: interrupt unblocked
Jun 17 16:04:08 [kernel] [ 679.073553] spd5118 11-0050: Failed to write b = 0: -6
Jun 17 16:04:08 [kernel] [ 679.073557] spd5118 11-0050: PM: dpm_run_callback(): spd5118_resume [spd5118] returns -6
Jun 17 16:04:08 [kernel] [ 679.073568] spd5118 11-0050: PM: failed to resume async: error -6
Jun 17 16:04:08 [kernel] [ 679.074061] i915 0000:00:02.0: [drm] GT0: GuC firmware i915/tgl_guc_70.bin version 70.44.1
Jun 17 16:04:08 [kernel] [ 679.074064] i915 0000:00:02.0: [drm] GT0: HuC firmware i915/tgl_huc.bin version 7.9.3
Jun 17 16:04:08 [kernel] [ 679.077198] i915 0000:00:02.0: [drm] GT0: HuC: authenticated for all workloads
Jun 17 16:04:08 [kernel] [ 679.077845] i915 0000:00:02.0: [drm] GT0: GUC: submission enabled
Jun 17 16:04:08 [kernel] [ 679.077847] i915 0000:00:02.0: [drm] GT0: GUC: SLPC enabled
Jun 17 16:04:08 [kernel] [ 679.078171] i915 0000:00:02.0: [drm] GT0: GUC: RC enabled
Jun 17 16:04:08 [kernel] [ 679.139655] serial 00:01: activated
Jun 17 16:04:08 [kernel] [ 679.153997] serial 00:02: activated
Jun 17 16:04:08 [kernel] [ 679.254729] nvme nvme0: 8/0/0 default/read/poll queues
Jun 17 16:04:08 [kernel] [ 679.881962] r8169 0000:01:00.0 eth0: Link is Down
Jun 17 16:04:08 [kernel] [ 679.884194] mei_hdcp 0000:00:16.0-b638ab7e-94e2-4ea2-a552-d1c54b627f04: bound 0000:00:02.0 (ops i915_hdcp_ops [i915])
Jun 17 16:04:08 [kernel] [ 679.885253] mei_pxp 0000:00:16.0-fbf6fcf1-96cf-4e2e-a6a6-1bab8cbe36b1: bound 0000:00:02.0 (ops i915_pxp_tee_component_ops [i915])
Jun 17 16:04:08 [kernel] [ 679.885666] OOM killer enabled.
Jun 17 16:04:08 [kernel] [ 679.885672] Restarting tasks ... done.
Jun 17 16:04:08 [kernel] [ 679.888088] random: crng reseeded on system resumption
Jun 17 16:04:08 [kernel] [ 679.888145] PM: suspend exit