Suspend and Resume - Question about contents of /proc/acpi/wakeup

English Install/Boot/Login
1

I have 13.2/KDE (Kernel 3.16.7) running on a relatively new Asus Z97-A mobo.(Intel Chipsets)

I built this machine about 4 months ago - very fast, stable but was giving me fits with entering and staying in Sleep (S3, STR) state.
About once every 4 or so tries, machine would enter S3 and stay there. The other attempts, it would immediately Resume.
Info available in journalctl was not super helpful, but seemed to be pointing to some USB activity calling for resume.

In searching to correct this behaviour, I found some interesting, but not directly helpful, posts here https://forums.opensuse.org/showthread.php/499032-Don-t-wake-up-on-lid-open and also here https://bbs.archlinux.org/viewtopic.php?id=204127, referencing tweaks to /proc/acpi/wakeup.

What so far has resolved my ‘random’ resume issue is rearranging my USB peripheral connections.
The Z97-A mobo supports a new super speed USB 3.1 capability (ASmedia chip) on two dedicated ports.
I had a Bluetooth dongle attached to one of those ports, I moved it to a standard USB3 port and, so far, the random resumes have disappeared.
This could be an ASmedia driver issue or ??, I am not sure yet.

BUT, I notice something odd about the contents of my /proc/acpi/wakeup contents:

/proc/acpi> cat wakeup
Device  S-state   Status   Sysfs node
PEG0      S4    *disabled  pci:0000:00:01.0
PEGP      S4    *disabled  pci:0000:01:00.0
PEG1      S4    *disabled  pci:0000:00:01.1
PEGP      S4    *enabled   pci:0000:02:00.0
PEG2      S4    *disabled
PEGP      S4    *disabled
UAR1      S4    *disabled
PS2K      S4    *disabled
PS2M      S4    *disabled
RP01      S4    *disabled  pci:0000:00:1c.0
PXSX      S4    *disabled
RP02      S4    *disabled
PXSX      S4    *disabled
RP03      S4    *disabled
PXSX      S4    *disabled
RP05      S4    *disabled  pci:0000:00:1c.4
PXSX      S4    *enabled   pci:0000:06:00.0
RP06      S4    *disabled
PXSX      S4    *disabled
RP07      S4    *disabled  pci:0000:00:1c.6
PXSX      S4    *disabled  pci:0000:07:00.0
RP08      S4    *disabled
PXSX      S4    *disabled
RP04      S4    *disabled  pci:0000:00:1c.3
PXSX      S4    *disabled  pci:0000:04:00.0
GLAN      S4    *enabled   pci:0000:00:19.0
EHC1      S4    *enabled   pci:0000:00:1d.0
EHC2      S4    *enabled   pci:0000:00:1a.0
XHC       S4    *enabled   pci:0000:00:14.0
HDEF      S4    *disabled  pci:0000:00:1b.0

Specifically, all the entries are for S-state S4, which is Hibernate, which I don’t use.
Can anyone point me to how/where /proc/acpi/wakeup gets populated on boot?

I took a quick look at /proc/acpi/wakeup on my LEAP 42.1 laptop, it has entries for both S3 and S4.
Sleep works very reliably there, but much different hardware.

Thanks

2

Well bummer, on my third try to Suspend, the computer re-awoke, so my failure to stay asleep is still an issue as well.

Perhaps now more important that I understand why /proc/acpi/wakeup looks strange

3

/proc/acpi/wakeup shows the lowest sleep state where device still can wake up system. If device is capable of wakeup in S4, it should also be capable of wakeup in S3.