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* Debugging spurious wakeup
@ 2015-05-13  6:58 Gianluca Anzolin
  2015-05-13  7:46 ` Zhang, Rui
                   ` (3 more replies)
  0 siblings, 4 replies; 19+ messages in thread
From: Gianluca Anzolin @ 2015-05-13  6:58 UTC (permalink / raw)
  To: linux-acpi

Hello,

I have a curious problem with my system: whenever I wake up the PC with a WOL
magic packet and then power it off the systems comes back to life after a
couple of seconds, by itself.

I can reproduce the problem 100% of the times.

I've been having this problems for years. I remember this same issue occurred
also with my previous computer, with a different mainboard. My current system
has an ASUS P8B-WS mb with a Xeon 1275v2 CPU.

I've ruled out in the time many factors: traffic on the net (by disconnecting
the cable), RTC alarms (by disabling them)... long story short: I'm stuck.

While I'm not the only one with this issue (see[1]), some people have reported
mixed success by blacklisting some components (xhci-pci) or by setting
unrelated BIOS options. Unfortunately these workarounds never worked for me.

So I'm here to ask if there is a way to get the source/cause of the last wakeup
by setting some ACPI debug option. This way I could at least pinpoint the
device/interface that caused the spontaneous wakeup and then debug further or
at least disable it.

I've tried to enable the ACPI hardware-related messages with the kernel
arguments: acpi.debug_layer=0x2 acpi.debug_level=0xffffffff

Unfortunately I can't see the information I'm looking for in the resulting
output. Should I enable some other debug_layer? Could anybody point me in the
right direction?

Thank you and best regards,

Gianluca

[1] https://bbs.archlinux.org/viewtopic.php?id=173648

^ permalink raw reply	[flat|nested] 19+ messages in thread

end of thread, other threads:[~2015-06-23  8:32 UTC | newest]

Thread overview: 19+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2015-05-13  6:58 Debugging spurious wakeup Gianluca Anzolin
2015-05-13  7:46 ` Zhang, Rui
2015-05-13  8:12   ` Gianluca Anzolin
2015-05-13  8:13     ` Zhang, Rui
2015-05-13  8:26       ` Gianluca Anzolin
2015-05-13  8:30         ` Zhang, Rui
2015-05-13  9:03           ` Gianluca Anzolin
2015-05-13  9:42             ` Zhang, Rui
2015-05-13 10:17               ` Gianluca Anzolin
2015-05-13 10:51                 ` Gianluca Anzolin
2015-05-14 12:51 ` Gianluca Anzolin
2015-05-15  7:52   ` Gianluca Anzolin
2015-05-15  7:54 ` Daniel Lezcano
2015-05-15  8:35   ` Gianluca Anzolin
2015-05-15  8:49     ` Daniel Lezcano
2015-06-20 21:54 ` Andreas Mohr
2015-06-22 19:48   ` Gianluca Anzolin
2015-06-23  6:36     ` Gianluca Anzolin
2015-06-23  8:32       ` Daniel Lezcano

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