笔记本suspended后数秒无故wake up问题排查（"ACPI: Waking up from system sleep state S3"）
在MacBook Pro上安装了Fedora 26操作系统，桌面是LXQt，设置了合上笔记本屏幕就进入suspend，但是，非常头疼的时，过几秒种就立即启动起来，导致笔记本放在包里面烫得不得了（和烧热的铁板一样）。
检查message日志显示系统suspended之后，立即被ACPI唤醒
...
Nov 7 21:23:04 DevStudio kernel: smpboot: CPU 4 is now offline
Nov 7 21:23:04 DevStudio kernel: IRQ 33: no longer affine to CPU5
Nov 7 21:23:04 DevStudio kernel: smpboot: CPU 5 is now offline
Nov 7 21:23:04 DevStudio kernel: IRQ 18: no longer affine to CPU6
Nov 7 21:23:04 DevStudio kernel: smpboot: CPU 6 is now offline
Nov 7 21:23:04 DevStudio kernel: smpboot: CPU 7 is now offline
Nov 7 21:23:04 DevStudio kernel: ACPI: Low-level resume complete
Nov 7 21:23:04 DevStudio kernel: ACPI: EC: EC started
Nov 7 21:23:04 DevStudio kernel: PM: Restoring platform NVS memory
Nov 7 21:23:04 DevStudio kernel: Suspended for 2.688 seconds
Nov 7 21:23:04 DevStudio kernel: Enabling non-boot CPUs ...
Nov 7 21:23:04 DevStudio kernel: x86: Booting SMP configuration:
Nov 7 21:23:04 DevStudio kernel: smpboot: Booting Node 0 Processor 1 APIC 0x2
Nov 7 21:23:04 DevStudio kernel: cache: parent cpu1 should not be sleeping
Nov 7 21:23:04 DevStudio kernel: CPU1 is up
Nov 7 21:23:04 DevStudio kernel: smpboot: Booting Node 0 Processor 2 APIC 0x4
Nov 7 21:23:04 DevStudio kernel: cache: parent cpu2 should not be sleeping
Nov 7 21:23:04 DevStudio kernel: CPU2 is up
Nov 7 21:23:04 DevStudio kernel: smpboot: Booting Node 0 Processor 3 APIC 0x6
Nov 7 21:23:04 DevStudio kernel: cache: parent cpu3 should not be sleeping
Nov 7 21:23:04 DevStudio kernel: CPU3 is up
Nov 7 21:23:04 DevStudio kernel: smpboot: Booting Node 0 Processor 4 APIC 0x1
Nov 7 21:23:04 DevStudio kernel: cache: parent cpu4 should not be sleeping
Nov 7 21:23:04 DevStudio kernel: CPU4 is up
Nov 7 21:23:04 DevStudio kernel: smpboot: Booting Node 0 Processor 5 APIC 0x3
Nov 7 21:23:04 DevStudio kernel: cache: parent cpu5 should not be sleeping
Nov 7 21:23:04 DevStudio kernel: CPU5 is up
Nov 7 21:23:04 DevStudio kernel: smpboot: Booting Node 0 Processor 6 APIC 0x5
Nov 7 21:23:04 DevStudio kernel: cache: parent cpu6 should not be sleeping
Nov 7 21:23:04 DevStudio kernel: CPU6 is up
Nov 7 21:23:04 DevStudio kernel: smpboot: Booting Node 0 Processor 7 APIC 0x7
Nov 7 21:23:04 DevStudio kernel: cache: parent cpu7 should not be sleeping
Nov 7 21:23:04 DevStudio kernel: CPU7 is up
Nov 7 21:23:04 DevStudio kernel: ACPI: Waking up from system sleep state S3导致上述休眠（suspended）之后立即被唤醒，是因为ACPI电源管理wakeup中有某个激活的设备触发导致的。具体是哪个设备需要检查自己笔记本的配置。
检查
wakeup事件：
cat /proc/acpi/wakeup在我的笔记上上显示输出
Device S-state Status Sysfs node
P0P2 S3 *disabled pci:0000:00:01.0
GFX0 S3 *disabled pci:0000:01:00.0
PEG1 S3 *disabled pci:0000:00:01.1
EC S4 *disabled platform:PNP0C09:00
GMUX S3 *disabled pnp:00:03
HDEF S3 *disabled pci:0000:00:1b.0
RP03 S3 *disabled pci:0000:00:1c.2
ARPT S4 *disabled pci:0000:03:00.0
RP04 S3 *disabled pci:0000:00:1c.3
RP05 S3 *disabled pci:0000:00:1c.4
XHC1 S3 *enabled pci:0000:00:14.0
ADP1 S4 *disabled platform:ACPI0003:00
LID0 S4 *enabled platform:PNP0C0D:00也就是说，系统中有两个可能触发唤醒的设备分别如下
Device S-state Status Sysfs node
XHC1 S3 *enabled pci:0000:00:14.0
LID0 S4 *enabled platform:PNP0C0D:00要尝试禁用某个设备唤醒，只要将这个设备
echo到/proc/acpi/wakeup就可以关闭
echo XHC1 | sudo tee /proc/acpi/wakeup然后再次检查
wakeup事件，就可以看到只有LID0可以唤醒系统
Device S-state Status Sysfs node
P0P2 S3 *disabled pci:0000:00:01.0
GFX0 S3 *disabled pci:0000:01:00.0
PEG1 S3 *disabled pci:0000:00:01.1
EC S4 *disabled platform:PNP0C09:00
GMUX S3 *disabled pnp:00:03
HDEF S3 *disabled pci:0000:00:1b.0
RP03 S3 *disabled pci:0000:00:1c.2
ARPT S4 *disabled pci:0000:03:00.0
RP04 S3 *disabled pci:0000:00:1c.3
RP05 S3 *disabled pci:0000:00:1c.4
XHC1 S3 *disabled pci:0000:00:14.0
ADP1 S4 *disabled platform:ACPI0003:00
LID0 S4 *enabled platform:PNP0C0D:00再次验证就发现休眠作用已经工作正常。
另外，如果要禁用多个设备，如XHC EHC1 EHC2，可以使用如下脚本
for device in XHC EHC1 EHC2; do
grep $device /proc/acpi/wakeup | grep enabled > /dev/null && {
echo Disabling wakeup on $device
echo $device > /proc/acpi/wakeup
}
done将上述设置添加到启动
/etc/rc.local脚本中，参考systemd管理rc.local启动
参考
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