[touch] NetworkManager needs to inhibit sleep if hotspot is active

[Tony Espy]

As Ubuntu touch uses an auto-suspend model, it's possible for the system to be suspended while a user has a hotspot active and in use.

In order to prevent such behavior, we should modify NetworkManager to inhibit suspend via powerd's DBus interface when hotspot is active and one or more clients are connected to the hotspot. As a first pass, inhibiting suspend when hotspot is active would probably be sufficient. This could probably be implemented via a NM dispatcher script, which would run when the hotspot is activated.

<https://wiki.ubuntu.com/Networking#hotspot-power>:
"* Whenever at least one person is using your hotspot, the device should not sleep automatically.
* The indicator icon should be different when anyone is connected than when no-one is.
* If a hotspot is set up, there should be a “Hotspot” item in the “Ways to reduce battery use” list in “Power” settings."

[Matthew Paul Thomas (mpt)]

Ubuntu for PC has an auto-suspend option too, so exactly the same inhibiting behavior should apply there, right? No need for this to be form-factor-specific.

Anyway, specifications updated.
<https://wiki.ubuntu.com/Networking?action=diff&rev2=281&rev1=280>
<https://wiki.ubuntu.com/Power?action=diff&rev2=75&rev1=74>

[Pat McGowan (pat-mcgowan)]

needs assigning, I think pete was going to handle it

[Alejandro J. Cura (alecu)]

Reassigning since Pete is working on this

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Launchpad Janitor (janitor)]

This bug was fixed in the package indicator-network - 0.5.2+15.10.20150810.1-0ubuntu1

---------------
indicator-network (0.5.2+15.10.20150810.1-0ubuntu1) wily; urgency=medium

  [ Pete Woods ]
  * Add hotspot management.
  * Don't show access points when hotspot is enabled (LP: #1478160)
  * Hold a wakelock when the hotspot is active. (LP: #1458046)
  * Seed the random number generator (LP: #1478157)
  * Simplify wifi/flight toggles

 -- CI Train Bot <email address hidden> Mon, 10 Aug 2015 16:51:11 +0000