Comment # 16 on bug 900273 from 

Disabling wake-on-lan works... for a while.
Then suspend doesn't work *at all*.

I even strace'd:

echo mem > /sys/power/state

and it ended up stuck in the write system call.

2014-11-24T18:40:14.289985-06:00 linux kernel: [86179.636073] PM: Syncing
filesystems ... done.
2014-11-24T18:40:14.290001-06:00 linux kernel: [86180.709563] PM: Preparing
system for mem sleep
2014-11-24T18:40:14.290038-06:00 linux kernel: [86180.709821] Freezing user
space processes ... (elapsed 0.001 seconds) done.
2014-11-24T18:40:14.290039-06:00 linux kernel: [86180.711568] Freezing
remaining freezable tasks ... (elapsed 0.001 seconds) done.
2014-11-24T18:40:14.290040-06:00 linux kernel: [86180.712775] PM: Entering mem
sleep
2014-11-24T18:40:14.290041-06:00 linux kernel: [86180.712819] Suspending
console(s) (use no_console_suspend to debug)
2014-11-24T18:40:14.290041-06:00 linux kernel: [86180.713293] sd 0:0:0:0: [sda]
Synchronizing SCSI cache
2014-11-24T18:40:14.290042-06:00 linux kernel: [86180.713596] sd 0:0:0:0: [sda]
Stopping disk
2014-11-24T18:40:14.290043-06:00 linux kernel: [86181.343664] PM: suspend of
devices complete after 630.362 msecs
2014-11-24T18:40:14.290044-06:00 linux kernel: [86181.354677] PM: late suspend
of devices complete after 11.002 msecs
2014-11-24T18:40:14.291747-06:00 linux kernel: [86181.355484] ehci-pci
0000:00:1d.0: System wakeup enabled by ACPI
2014-11-24T18:40:14.291761-06:00 linux kernel: [86181.355566] ehci-pci
0000:00:1a.0: System wakeup enabled by ACPI
2014-11-24T18:40:14.291762-06:00 linux kernel: [86181.366532] PM: noirq suspend
of devices complete after 11.843 msecs
2014-11-24T18:40:14.291763-06:00 linux kernel: [86181.366986] ACPI: Preparing
to enter system sleep state S3
2014-11-24T18:40:14.291763-06:00 linux kernel: [86181.368501] PM: Saving
platform NVS memory
2014-11-24T18:40:14.291764-06:00 linux kernel: [86181.369253] Disabling
non-boot CPUs ...
2014-11-24T18:40:14.291765-06:00 linux kernel: [86181.369300] intel_pstate CPU
1 exiting
2014-11-24T18:40:14.291765-06:00 linux kernel: [86181.370546] smpboot: CPU 1 is
now offline
2014-11-24T18:40:14.291766-06:00 linux kernel: [86181.371837] ACPI: Low-level
resume complete
2014-11-24T18:40:14.291767-06:00 linux kernel: [86181.371887] PM: Restoring
platform NVS memory
2014-11-24T18:40:14.291767-06:00 linux kernel: [86181.372636] Enabling non-boot
CPUs ...
2014-11-24T18:40:14.291768-06:00 linux kernel: [86181.372735] x86: Booting SMP
configuration:
2014-11-24T18:40:14.291769-06:00 linux kernel: [86181.372736] smpboot: Booting
Node 0 Processor 1 APIC 0x2
2014-11-24T18:40:14.291769-06:00 linux kernel: [86181.383700] CPU1 microcode
updated early to revision 0x29, date = 2013-06-12
2014-11-24T18:40:14.291770-06:00 linux kernel: [86181.383880] Disabled fast
string operations
2014-11-24T18:40:14.291771-06:00 linux kernel: [86181.386162] Intel pstate
controlling: cpu 1
2014-11-24T18:40:14.291771-06:00 linux kernel: [86181.386218] CPU1 is up
2014-11-24T18:40:14.291772-06:00 linux kernel: [86181.387533] ACPI: Waking up
from system sleep state S3
2014-11-24T18:40:14.291773-06:00 linux kernel: [86181.427323] ehci-pci
0000:00:1d.0: System wakeup disabled by ACPI
2014-11-24T18:40:14.291773-06:00 linux kernel: [86181.427348] ehci-pci
0000:00:1a.0: System wakeup disabled by ACPI
2014-11-24T18:40:14.291774-06:00 linux kernel: [86181.428062] PM: noirq resume
of devices complete after 11.507 msecs
2014-11-24T18:40:14.291775-06:00 linux kernel: [86181.428290] PM: early resume
of devices complete after 0.203 msecs
2014-11-24T18:40:14.291775-06:00 linux kernel: [86181.429181] mei_me
0000:00:16.0: irq 42 for MSI/MSI-X
2014-11-24T18:40:14.291776-06:00 linux kernel: [86181.429400] snd_hda_intel
0000:00:1b.0: irq 43 for MSI/MSI-X
2014-11-24T18:40:14.291777-06:00 linux kernel: [86181.440211] sd 0:0:0:0: [sda]
Starting disk
2014-11-24T18:40:14.291777-06:00 linux kernel: [86181.441211] [drm] Wrong
MCH_SSKPD value: 0x16040307
2014-11-24T18:40:14.291778-06:00 linux kernel: [86181.441212] [drm] This can
cause pipe underruns and display issues.
2014-11-24T18:40:14.291779-06:00 linux kernel: [86181.441212] [drm] Please
upgrade your BIOS to fix this.
2014-11-24T18:40:14.291779-06:00 linux kernel: [86181.565504] r8169
0000:03:00.0 eth0: link down
2014-11-24T18:40:14.291780-06:00 linux kernel: [86181.639393] usb 1-1.5: reset
high-speed USB device number 3 using ehci-pci
2014-11-24T18:40:14.291781-06:00 linux kernel: [86181.639434] usb 2-1.3: reset
full-speed USB device number 4 using ehci-pci
2014-11-24T18:40:14.291782-06:00 linux kernel: [86181.747311] ata4: SATA link
down (SStatus 0 SControl 300)
2014-11-24T18:40:14.291782-06:00 linux kernel: [86181.749357] ata5: SATA link
up 1.5 Gbps (SStatus 113 SControl 300)
2014-11-24T18:40:14.291783-06:00 linux kernel: [86181.751321] ata6: SATA link
down (SStatus 0 SControl 300)
2014-11-24T18:40:14.291783-06:00 linux kernel: [86181.753088] ata5.00:
configured for UDMA/100
2014-11-24T18:40:14.291784-06:00 linux kernel: [86181.797480] usb 2-1.6: reset
high-speed USB device number 5 using ehci-pci
2014-11-24T18:40:14.291785-06:00 linux kernel: [86183.411410] [drm] Enabling
RC6 states: RC6 on, RC6p off, RC6pp off
2014-11-24T18:40:14.291785-06:00 linux kernel: [86184.251818] ata1: SATA link
up 3.0 Gbps (SStatus 123 SControl 300)
2014-11-24T18:40:14.291786-06:00 linux kernel: [86184.479212] ata1.00:
configured for UDMA/133
2014-11-24T18:40:14.291787-06:00 linux kernel: [86184.487963] PM: resume of
devices complete after 3057.943 msecs
2014-11-24T18:40:14.291787-06:00 linux kernel: [86184.488148] PM: Finishing
wakeup.
2014-11-24T18:40:14.291788-06:00 linux kernel: [86184.488149] Restarting tasks
... 
2014-11-24T18:40:14.291789-06:00 linux kernel: [86184.488262] bcma-pci-bridge
0000:02:00.0: no hotplug settings from platform
2014-11-24T18:40:14.291789-06:00 linux kernel: [86184.488318] r8169
0000:03:00.0: no hotplug settings from platform
2014-11-24T18:40:14.296617-06:00 linux kernel: [86184.493936] done.
...

and after this, it wouldn't suspend again.

In fact, I tried shutting it off and it just sat there, partially shut down,
with no indication as to what it was doing (or not doing) for several minutes.
I finally had to hold down the power button to get it to shut off.

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