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[Gabriele <1161962@xxxxxxxxxxxxxxxxxx>]

What I suggested in my previous message didn't solve the problem and as
said by other the problem was Intel Rapid Start Technology.

What happens is that the firmware sets a wakeup timer as soon as the
laptop is suspended and doesn't cancel it if the laptop is resumed
before it expires. Linux is not aware of this timer and so it doesn't
cancel it as the firmware expects it to do.

IRST does not require any configuration, so the timer is set as long as
IRST is activated (I don't know if not having the dedicated partition
prevents the problem even if IRST is activated).

I'll link the fix once is available in the mainline kernel, in the
meantime disable IRST from the BIOS or set wakeup_events [1] to either 0
or 2.

[1] - https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-driver-
intel-rapid-start

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https://bugs.launchpad.net/bugs/1161962

Title:
  XPS 13 wakes up from suspend spontaneously

Status in Dell Sputnik:
  In Progress
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  My XPS 13 wakes up from suspend by itself. This is very annoying and potentially dangerous since it happens while the computer is its sleeve/bag.
  Can't tell from the pm-suspend and dmesg what causes the behavior so please let me know what logs you need to investigate it and I will provide them.

  Further note: It seems like the spontaneous wake up is happening
  around 40 minutes after suspend every time it occurs. However, the
  spontaneous wake up does not occur every time.

  Running Xubuntu 12.10 with the following Sputnik Kernel: 
  3.5.0-26-generic #42+kamal15~DellXPS-Ubuntu

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