我正在运行 Ubuntu 16.04。我可以通过几种方法将笔记本电脑置于挂起状态（pm-suspend、Cinnamon 电源菜单、挂起硬件按钮）。
当笔记本电脑使用电池供电时，此功能可正常工作，但当我将其插入交流电源并暂停时，它会在几秒钟后自动重新打开。但是，当启动 Windows 时，使用交流电源时，暂停功能可以正常工作。
更新： /var/log/pm-suspend.log什么也没有显示。
这是我所看到的/var/log/syslog：暂停 3/4 个 CPU 核心后，电源似乎立即恢复。
Feb 7 21:18:46 localhost systemd[1]: Starting Suspend...
Feb 7 21:18:46 localhost systemd-sleep[9741]: Failed to connect to non-global ctrl_ifname: (nil) error: No such file or directory
Feb 7 21:18:46 localhost systemd-sleep[9743]: /lib/systemd/system-sleep/wpasupplicant failed with error code 255.
Feb 7 21:18:46 localhost systemd-sleep[9741]: Suspending system...
Feb 7 21:18:53 localhost kernel: [ 3992.819765] PM: Syncing filesystems ... done.
Feb 7 21:18:53 localhost kernel: [ 3992.850579] PM: Preparing system for sleep (mem)
Feb 7 21:18:53 localhost kernel: [ 3992.851319] Freezing user space processes ... (elapsed 0.002 seconds) done.
Feb 7 21:18:53 localhost kernel: [ 3992.854001] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
Feb 7 21:18:53 localhost kernel: [ 3992.855268] PM: Suspending system (mem)
Feb 7 21:18:53 localhost kernel: [ 3992.855289] Suspending console(s) (use no_console_suspend to debug)
Feb 7 21:18:53 localhost kernel: [ 3992.859005] sd 0:0:0:0: [sda] Synchronizing SCSI cache
Feb 7 21:18:53 localhost kernel: [ 3992.863965] usb 1-1.4: disconnecting
Feb 7 21:18:53 localhost kernel: [ 3992.866889] sd 0:0:0:0: [sda] Stopping disk
Feb 7 21:18:53 localhost kernel: [ 3993.508191] PM: suspend of devices complete after 652.621 msecs
Feb 7 21:18:53 localhost kernel: [ 3993.524058] PM: late suspend of devices complete after 15.849 msecs
Feb 7 21:18:53 localhost kernel: [ 3993.525021] ehci-pci 0000:00:1d.0: System wakeup enabled by ACPI
Feb 7 21:18:53 localhost kernel: [ 3993.525191] ehci-pci 0000:00:1a.0: System wakeup enabled by ACPI
Feb 7 21:18:53 localhost kernel: [ 3993.525194] xhci_hcd 0000:00:14.0: System wakeup enabled by ACPI
Feb 7 21:18:53 localhost kernel: [ 3993.540020] PM: noirq suspend of devices complete after 15.957 msecs
Feb 7 21:18:53 localhost kernel: [ 3993.540490] ACPI: Preparing to enter system sleep state S3
Feb 7 21:18:53 localhost kernel: [ 3993.540762] ACPI : EC: EC stopped
Feb 7 21:18:53 localhost kernel: [ 3993.540763] PM: Saving platform NVS memory
Feb 7 21:18:53 localhost kernel: [ 3993.540768] Disabling non-boot CPUs ...
Feb 7 21:18:53 localhost kernel: [ 3993.541121] Broke affinity for irq 16
Feb 7 21:18:53 localhost kernel: [ 3993.541125] Broke affinity for irq 23
Feb 7 21:18:53 localhost kernel: [ 3993.541132] Broke affinity for irq 27
Feb 7 21:18:53 localhost kernel: [ 3993.541139] Cannot set affinity for irq 37
Feb 7 21:18:53 localhost kernel: [ 3993.542171] smpboot: CPU 1 is now offline
Feb 7 21:18:53 localhost kernel: [ 3993.552763] Broke affinity for irq 16
Feb 7 21:18:53 localhost kernel: [ 3993.552767] Broke affinity for irq 23
Feb 7 21:18:53 localhost kernel: [ 3993.552774] Broke affinity for irq 27
Feb 7 21:18:53 localhost kernel: [ 3993.552778] Broke affinity for irq 28
Feb 7 21:18:53 localhost kernel: [ 3993.553811] smpboot: CPU 2 is now offline
Feb 7 21:18:53 localhost kernel: [ 3993.568351] Broke affinity for irq 1
Feb 7 21:18:53 localhost kernel: [ 3993.568353] Broke affinity for irq 8
Feb 7 21:18:53 localhost kernel: [ 3993.568355] Broke affinity for irq 9
Feb 7 21:18:53 localhost kernel: [ 3993.568357] Broke affinity for irq 12
Feb 7 21:18:53 localhost kernel: [ 3993.568359] Broke affinity for irq 16
Feb 7 21:18:53 localhost kernel: [ 3993.568361] Broke affinity for irq 23
Feb 7 21:18:53 localhost kernel: [ 3993.568363] Broke affinity for irq 26
Feb 7 21:18:53 localhost kernel: [ 3993.568365] Broke affinity for irq 27
Feb 7 21:18:53 localhost kernel: [ 3993.568367] Broke affinity for irq 28
Feb 7 21:18:53 localhost kernel: [ 3993.569379] smpboot: CPU 3 is now offline
Feb 7 21:18:53 localhost kernel: [ 3993.581513] ACPI: Low-level resume complete
Feb 7 21:18:53 localhost kernel: [ 3993.581562] ACPI : EC: EC started
Feb 7 21:18:53 localhost kernel: [ 3993.581563] PM: Restoring platform NVS memory
Feb 7 21:18:53 localhost kernel: [ 3993.581915] Enabling non-boot CPUs ...
Feb 7 21:18:53 localhost kernel: [ 3993.601924] x86: Booting SMP configuration:
Feb 7 21:18:53 localhost kernel: [ 3993.601926] smpboot: Booting Node 0 Processor 1 APIC 0x1
Feb 7 21:18:53 localhost kernel: [ 3993.605684] cache: parent cpu1 should not be sleeping
Feb 7 21:18:53 localhost kernel: [ 3993.605868] CPU1 is up
Feb 7 21:18:53 localhost kernel: [ 3993.626101] smpboot: Booting Node 0 Processor 2 APIC 0x2
Feb 7 21:18:53 localhost kernel: [ 3993.630007] cache: parent cpu2 should not be sleeping
Feb 7 21:18:53 localhost kernel: [ 3993.630195] CPU2 is up
Feb 7 21:18:53 localhost kernel: [ 3993.650191] smpboot: Booting Node 0 Processor 3 APIC 0x3
Feb 7 21:18:53 localhost kernel: [ 3993.654260] cache: parent cpu3 should not be sleeping
Feb 7 21:18:53 localhost kernel: [ 3993.654441] CPU3 is up
Feb 7 21:18:53 localhost kernel: [ 3993.660043] ACPI: Waking up from system sleep state S3
Feb 7 21:18:53 localhost kernel: [ 3994.121929] ehci-pci 0000:00:1d.0: System wakeup disabled by ACPI
Feb 7 21:18:53 localhost kernel: [ 3994.122047] xhci_hcd 0000:00:14.0: System wakeup disabled by ACPI
Feb 7 21:18:53 localhost kernel: [ 3994.122366] ehci-pci 0000:00:1a.0: System wakeup disabled by ACPI
Feb 7 21:18:53 localhost kernel: [ 3994.122617] PM: noirq resume of devices complete after 16.560 msecs
Feb 7 21:18:53 localhost kernel: [ 3994.123375] PM: early resume of devices complete after 0.717 msecs
Feb 7 21:18:53 localhost kernel: [ 3994.124344] rtc_cmos 00:01: System wakeup disabled by ACPI
Feb 7 21:18:53 localhost kernel: [ 3994.131657] sd 0:0:0:0: [sda] Starting disk
Feb 7 21:18:53 localhost kernel: [ 3994.353778] usb 2-1.5: reset full-speed USB device number 3 using ehci-pci
Feb 7 21:18:53 localhost kernel: [ 3994.365806] usb 1-1.3: reset high-speed USB device number 4 using ehci-pci
Feb 7 21:18:53 localhost kernel: [ 3994.449779] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
Feb 7 21:18:53 localhost kernel: [ 3994.450867] ata1.00: configured for UDMA/133
Feb 7 21:18:53 localhost kernel: [ 3994.517793] usb 2-1.7: reset high-speed USB device number 4 using ehci-pci
Feb 7 21:18:53 localhost kernel: [ 3994.529906] usb 1-1.4: reset high-speed USB device number 5 using ehci-pci
Feb 7 21:18:53 localhost kernel: [ 3994.607066] psmouse serio1: synaptics: queried max coordinates: x [..5664], y [..4682]
Feb 7 21:18:53 localhost kernel: [ 3994.652971] psmouse serio1: synaptics: queried min coordinates: x [1278..], y [1172..]
Feb 7 21:18:53 localhost kernel: [ 3994.693878] usb 1-1.5: reset full-speed USB device number 6 using ehci-pci
Feb 7 21:18:53 localhost kernel: [ 3996.661729] PM: resume of devices complete after 2538.071 msecs
答案1
/var/log包含所有系统日志文件。该syslog文件可能是您想要检查的文件。