Luis, thanks for the hint, it never occured to me that WoL could affect
a machine that is already "awake". Anyway, I did some more and more
caruful measurements using powerstat and after these it seems that the
problem is with powertop after all. Sorry for the mistake.

When unloading the sky2 module with active network otherwise (i.e.
wifi), there is actually no change in power usage at all! When reloading
the sky2 module it doesn't even appear in powertop. When activating
networking again in network-manager (God knows what that does exactly),
it reappears as power hog. However, measuring again, there is only a
minimal increase in actual power usage as reported by the battery (about
.13W with the standard deviation of the measurements being higher than
that).

So I guess what I saw in the first place was other networking stuff or
just fluctuations. Sorry again for doing the appropriate measurements
*after* filing the report. I'm moving this to the powertop package as
the problem seems to be in the estimates alone.

Bringing up an actual link BTW will make powertop show 6W or so for the
device although the overall system usage is only 9W (from 7 before the
link).

** Package changed: linux (Ubuntu) => powertop (Ubuntu)

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https://bugs.launchpad.net/bugs/961172

Title:
  sky2 draws up to 1.27W of power without a link

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