Hope this is of some use to diagnose the issue further. I have the
following observations from a Macbook pro that wakes immediately after
suspend
```
cat /proc/acpi/wakeup 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
```
Note two ACPI wakeup sources - XHC1 and LID0 (XHC1 is USB - eg for
external keyboards, LID0 is the lid). Now you can toggle their wakeup
powers as follows
```
$ echo XHC1 | sudo tee /proc/acpi/wakeup
$ echo LID0 | sudo tee /proc/acpi/wakeup
```
(Note with both XHC1 and LID disabled only the power-button will wake
you)
What I see: (Truth table)
XHC1 | LID0 | Result
disabled | disabled | Stays asleep until power button hit
enabled | enabled | Wake after 2.5 seconds sleep
enabled | disabled | Wake after 2.5 seconds sleep
disabled | enabled | Stays asleep if lid left closed
| | Wake after 2.5 seconds sleep if lid left open
>From this I infer that something on the USB bus (or the USB driver
itself) is causing a wake - I can't find a culprit device on the bus.
>From this I also infer that the lid state reports regularly - ie its not
the act of opening that causes the wake its the fact of it being open.
So by disabling just XHC1 I lose keyboard wake, but I can close the lid
to sleep and open it to wake which is just about workable for me.
Hope that helps
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https://bugs.launchpad.net/bugs/1483054
Title:
macbook air wakes up immediately after suspend
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