I see lots of these messages:

Nov 19 08:03:43 ubuntu-phablet NetworkManager[1448]: <warn> Activation 
(wlan0/wireless): association took too long, failing activation.
Nov 19 08:03:43 ubuntu-phablet NetworkManager[1448]: <info> (wlan0): device 
state change: config -> failed (reason 'SSID not found') [50 120 53]
Nov 19 08:03:43 ubuntu-phablet NetworkManager[1448]: <info> NetworkManager 
state is now DISCONNECTED
Nov 19 08:03:43 ubuntu-phablet NetworkManager[1448]: <warn> Activation (wlan0) 
failed for connection 'Canonical-5GHz-an'
Nov 19 08:03:43 ubuntu-phablet NetworkManager[1448]: <info> (wlan0): device 
state change: failed -> disconnected (reason 'none') [120 30 0]
Nov 19 08:03:43 ubuntu-phablet NetworkManager[1448]: <info> (wlan0): 
deactivating device (reason 'none') [0]
Nov 19 08:03:43 ubuntu-phablet kernel: [51481.120852] wlan: [1317:E :SME] 
csrMoveTempScanResultsToMainList: 2908: 11d AP Bssid 84:18:3a:44:da:ec chan= 
36, rssi = -50, countryCode US
Nov 19 08:03:43 ubuntu-phablet kernel: [51481.121920] wlan: [1317:E :SME] 
csrMoveTempScanResultsToMainList: 2908: 11d AP Bssid 84:18:3a:44:da:e8 chan= 8, 
rssi = -40, countryCode US
Nov 19 08:03:43 ubuntu-phablet kernel: [51481.122835] wlan: [1317:E :SME] 
csrMoveTempScanResultsToMainList: 2928: Information about current country Bssid 
84:18:3a:04:da:e8 chan= 8, rssi = -40, countryCode US
Nov 19 08:03:43 ubuntu-phablet wpa_supplicant[1828]: wlan0: Failed to initiate 
sched scan
Nov 19 08:03:43 ubuntu-phablet wpa_supplicant[1828]: wlan0: 
CTRL-EVENT-SCAN-STARTED 
Nov 19 08:03:44 ubuntu-phablet kernel: [51482.020195] wlan: [1317:E :SME] 
csrMoveTempScanResultsToMainList: 2908: 11d AP Bssid 84:18:3a:08:65:b8 chan= 4, 
rssi = -84, countryCode US
Nov 19 08:03:44 ubuntu-phablet kernel: [51482.021142] wlan: [1317:E :SME] 
csrMoveTempScanResultsToMainList: 2908: 11d AP Bssid 84:18:3a:44:da:ec chan= 
36, rssi = -50, countryCode US
Nov 19 08:03:44 ubuntu-phablet kernel: [51482.021935] wlan: [1317:E :SME] 
csrMoveTempScanResultsToMainList: 2908: 11d AP Bssid 84:18:3a:44:da:e8 chan= 8, 
rssi = -38, countryCode US
Nov 19 08:03:44 ubuntu-phablet kernel: [51482.022912] wlan: [1317:E :SME] 
csrMoveTempScanResultsToMainList: 2908: 11d AP Bssid 84:18:3a:04:da:e8 chan= 8, 
rssi = -37, countryCode US
Nov 19 08:03:44 ubuntu-phablet kernel: [51482.023614] wlan: [1317:E :SME] 
csrMoveTempScanResultsToMainList: 2928: Information about current country Bssid 
84:18:3a:04:da:e8 chan= 8, rssi = -37, countryCode US
Nov 19 08:03:45 ubuntu-phablet NetworkManager[1448]: <info> (wlan0): supplicant 
interface state: scanning -> disconnected
Nov 19 08:03:45 ubuntu-phablet NetworkManager[1448]: <warn> Couldn't disconnect 
supplicant interface: This interface is not connected

It tells me you're likely just outside of the range of the accesspoints,
and since it comes in and out of scan results regularly, NM will keep
trying to authenticate while the AP is available.

A couple of things to try:
 - Switch to 2.4GHz, see if the behavior is the same, this could give us some 
interesting data points.
 - Disable location, which causes significantly more wifi scans to be 
triggered, and reducing that may also improve the situation.
 - Try to attach strace to NetworkManager and/or dbus-daemon, this would let us 
see what they are spinning at when they are consuming lots of CPU (as per the 
report).

** Changed in: network-manager-applet (Ubuntu)
       Status: New => Incomplete

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1394204

Title:
  dbus daemon spinning with NM AP properties change event

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/network-manager-applet/+bug/1394204/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Reply via email to