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[Yaniv Dary <dyaniv@xxxxxxxxxxx>]

Public bug reported:

After update to kernel linux-image-3.19.0-43 Wifi will not connect. Reverting to linux-image-3.19.0-42 fixes this issue.
I'm using ThinkPad T440s with Ubuntu LTS 14.04 trusty.

Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> (wlan0): device state change: config -> failed (reason 'SSID not found') [50 120 53]
Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> NetworkManager state is now DISCONNECTED
Jan 17 10:17:07thinkpad-t440sNetworkManager[1016]: <warn> Activation (wlan0) failed for connection 'Wifi'
Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> (wlan0): deactivating device (reason 'none') [0]
Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> (wlan0): supplicant interface state: scanning -> disconnected
Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <warn> Couldn't disconnect supplicant interface: This interface is not connected.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete

** Description changed:

  After update to kernel linux-image-3.19.0-43 Wifi will not connect. Reverting to linux-image-3.19.0-42 fixes this issue.
- I'm using ThinkPad T440s.
+ I'm using ThinkPad T440s with Ubuntu LTS 14.04 trusty.
  
  Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> (wlan0): device state change: config -> failed (reason 'SSID not found') [50 120 53]
  Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> NetworkManager state is now DISCONNECTED
  Jan 17 10:17:07thinkpad-t440sNetworkManager[1016]: <warn> Activation (wlan0) failed for connection 'Wifi'
  Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
  Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> (wlan0): deactivating device (reason 'none') [0]
  Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> (wlan0): supplicant interface state: scanning -> disconnected
  Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <warn> Couldn't disconnect supplicant interface: This interface is not connected.

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https://bugs.launchpad.net/bugs/1535053

Title:
  Wifi stops working with kernel update linux-image-3.19.0-43

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  After update to kernel linux-image-3.19.0-43 Wifi will not connect. Reverting to linux-image-3.19.0-42 fixes this issue.
  I'm using ThinkPad T440s with Ubuntu LTS 14.04 trusty.

  Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> (wlan0): device state change: config -> failed (reason 'SSID not found') [50 120 53]
  Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> NetworkManager state is now DISCONNECTED
  Jan 17 10:17:07thinkpad-t440sNetworkManager[1016]: <warn> Activation (wlan0) failed for connection 'Wifi'
  Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
  Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> (wlan0): deactivating device (reason 'none') [0]
  Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <info> (wlan0): supplicant interface state: scanning -> disconnected
  Jan 17 10:17:07 thinkpad-t440s NetworkManager[1016]: <warn> Couldn't disconnect supplicant interface: This interface is not connected.

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