** Description changed:
- Nwetwork Manager sets Power Management:off in iwconfig by default.
+ [Impact]
+ NetworkManager consumes more power than previous releases because powersave
support is not updated.
- It can be changed per connection by adding powersave=1.
+ [Test Case]
+ With the patch applied, network device power management should be on when
supported, for example:
- In 14.04 powersave was set on by default and could be disabled per connection.
- That seemed to be reasonable.
+ $ sudo iwconfig wlan0 | grep "Power Management"
+ Power Management:on
- If the default has been changed for some reason, it is better to make a NM
global setting.
- It is not handy to change every connection manually, and most users will not
be able to do it.
-
- After upgrade to 16.04 power consumption will increase.
-
- It is also funny that pm-tools set powersave on, but NM reverts this
- setting.
-
- ProblemType: Bug
- DistroRelease: Ubuntu 16.04
- Package: network-manager 1.0.4-0ubuntu10
- ProcVersionSignature: Ubuntu 4.4.0-12.28-generic 4.4.4
- Uname: Linux 4.4.0-12-generic x86_64
- ApportVersion: 2.20-0ubuntu3
- Architecture: amd64
- CurrentDesktop: Unity
- Date: Mon Mar 14 18:41:38 2016
- IfupdownConfig:
- # interfaces(5) file used by ifup(8) and ifdown(8)
- auto lo
- iface lo inet loopback
- InstallationDate: Installed on 2016-02-29 (13 days ago)
- InstallationMedia: Ubuntu 14.04.4 LTS "Trusty Tahr" - Release amd64
(20160217.1)
- IpRoute:
- default via 192.168.1.1 dev wlan0 proto static metric 600
- 169.254.0.0/16 dev wlan0 scope link metric 1000
- 192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.125
metric 600
- NetworkManager.state:
- [main]
- NetworkingEnabled=true
- WirelessEnabled=true
- WWANEnabled=true
- WimaxEnabled=true
- SourcePackage: network-manager
- UpgradeStatus: Upgraded to xenial on 2016-03-12 (1 days ago)
- modified.conffile..etc.NetworkManager.NetworkManager.conf: [modified]
- mtime.conffile..etc.NetworkManager.NetworkManager.conf:
2016-03-13T01:40:30.748775
- nmcli-dev:
- DEVICE TYPE STATE DBUS-PATH
CONNECTION CON-UUID CON-PATH
- wlan0 wifi connected /org/freedesktop/NetworkManager/Devices/1
Voxnet eafa9e18-fa85-4d9a-a705-6a3e97a45fbc
/org/freedesktop/NetworkManager/ActiveConnection/1
- eth0 ethernet unavailable /org/freedesktop/NetworkManager/Devices/2 --
-- --
- lo loopback unmanaged /org/freedesktop/NetworkManager/Devices/0 --
-- --
- nmcli-nm: Error: command ['nmcli', '-f', 'all', 'nm'] failed with exit code
2: Error: Object 'nm' is unknown, try 'nmcli help'.
+ [Regression Potential]
+ Regression may happen when the power management feature of certain device
isn't implemented properly in kernel, but since we are quite conservative on
enabling power management in kernel development such case should be rare.
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https://bugs.launchpad.net/bugs/1557026
Title:
[SRU]Network Manager sets powersave off by default in xenial
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