I'm on a laptop running Debian Jessie with kernel 3.13-1-amd64; lspci shows that my wireless NIC + driver is

04:00.0 Network controller: Intel Corporation Wireless 3160 (rev 83)
    Subsystem: Intel Corporation Dual Band Wireless-AC 3160
    Kernel driver in use: iwlwifi

This has been working without any problems, until I tried creating a bridge for lxc containers to use. I did the same thing as this person here: How-to set up a network bridge on a laptop for LXC use? -- and ended up having the same problem as this poster did, so I decided to "undo" my actions.

This hasn't been successful.

Actions taken so far:

To configure the bridge:

#> ip link add type veth
#> iw dev wlan0 set 4addr on
#> ifconfig veth0 up
#> brctl addbr br0
#> brctl addif br0 wlan0
#> brctl addif br0 veth0
#> ifconfig br0 192.168.0.4/24  
#> ifconfig wlan0 0.0.0.0

To "deconfigure":

#> brctl delif br0 wlan0
#> brctl delif br0 veth0
#> iw dev wlan0 set 4addr off
#> ifconfig veth0 down
#> ifconfig wlan0 down
#> ifconfig br0 down
#> brctl delbr br0

Now, dmesg and /var/log/syslog show repeated attempts at connecting to the AP that was working before, which fail after authentication:

May 27 09:16:01 myhostname kernel: [11350.757172] wlan0: authenticate with 00:18:f8:54:a3:d6
May 27 09:16:01 myhostname kernel: [11350.759036] wlan0: send auth to 00:18:f8:54:a3:d6 (try 1/3)
May 27 09:16:01 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: scanning -> authenticating
May 27 09:16:01 myhostname wpa_supplicant[8946]: wlan0: Trying to associate with 00:18:f8:54:a3:d6 (SSID='myaccesspoint' freq=2437 MHz)
May 27 09:16:01 myhostname kernel: [11350.762615] wlan0: authenticated
May 27 09:16:01 myhostname kernel: [11350.762753] iwlwifi 0000:04:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP
May 27 09:16:01 myhostname kernel: [11350.762755] iwlwifi 0000:04:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
May 27 09:16:01 myhostname kernel: [11350.765080] wlan0: associate with 00:18:f8:54:a3:d6 (try 1/3)
May 27 09:16:01 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: authenticating -> associating
May 27 09:16:01 myhostname kernel: [11350.767474] wlan0: RX AssocResp from 00:18:f8:54:a3:d6 (capab=0x411 status=12 aid=0)
May 27 09:16:01 myhostname kernel: [11350.767476] wlan0: 00:18:f8:54:a3:d6 denied association (code=12)
May 27 09:16:01 myhostname wpa_supplicant[8946]: wlan0: CTRL-EVENT-ASSOC-REJECT bssid=00:18:f8:54:a3:d6 status_code=12
May 27 09:16:01 myhostname kernel: [11350.788475] wlan0: deauthenticating from 00:18:f8:54:a3:d6 by local choice (reason=3)
May 27 09:16:01 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: associating -> disconnected
May 27 09:16:01 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: disconnected -> scanning
May 27 09:16:02 myhostname dhclient: DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 14
May 27 09:16:04 myhostname wpa_supplicant[8946]: wlan0: SME: Trying to authenticate with 00:18:f8:54:a3:d6 (SSID='myaccesspoint' freq=2437 MHz)
May 27 09:16:04 myhostname kernel: [11354.559579] wlan0: authenticate with 00:18:f8:54:a3:d6
May 27 09:16:04 myhostname kernel: [11354.561458] wlan0: send auth to 00:18:f8:54:a3:d6 (try 1/3)
May 27 09:16:04 myhostname wpa_supplicant[8946]: wlan0: Trying to associate with 00:18:f8:54:a3:d6 (SSID='myaccesspoint' freq=2437 MHz)
May 27 09:16:04 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: scanning -> associating
May 27 09:16:04 myhostname kernel: [11354.563445] wlan0: authenticated
May 27 09:16:04 myhostname kernel: [11354.563631] iwlwifi 0000:04:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP
May 27 09:16:04 myhostname kernel: [11354.563633] iwlwifi 0000:04:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
May 27 09:16:04 myhostname kernel: [11354.565727] wlan0: associate with 00:18:f8:54:a3:d6 (try 1/3)
May 27 09:16:04 myhostname wpa_supplicant[8946]: wlan0: Associated with 00:18:f8:54:a3:d6
May 27 09:16:04 myhostname kernel: [11354.568091] wlan0: RX AssocResp from 00:18:f8:54:a3:d6 (capab=0x411 status=0 aid=9)
May 27 09:16:04 myhostname kernel: [11354.569030] wlan0: associated
May 27 09:16:04 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: associating -> associated
May 27 09:16:05 myhostname kernel: [11354.978204] wlan0: deauthenticated from 00:18:f8:54:a3:d6 (Reason: 15)
May 27 09:16:05 myhostname wpa_supplicant[8946]: wlan0: CTRL-EVENT-DISCONNECTED bssid=00:18:f8:54:a3:d6 reason=15
May 27 09:16:05 myhostname kernel: [11354.992729] cfg80211: Calling CRDA to update world regulatory domain
May 27 09:16:05 myhostname kernel: [11354.995004] cfg80211: World regulatory domain updated:
May 27 09:16:05 myhostname kernel: [11354.995005] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
May 27 09:16:05 myhostname kernel: [11354.995006] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm)
May 27 09:16:05 myhostname kernel: [11354.995007] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm)
May 27 09:16:05 myhostname kernel: [11354.995007] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm)
May 27 09:16:05 myhostname kernel: [11354.995008] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz), (N/A, 2000 mBm)
May 27 09:16:05 myhostname kernel: [11354.995009] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm)
May 27 09:16:05 myhostname kernel: [11354.995010] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm)
May 27 09:16:05 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: associated -> disconnected
May 27 09:16:05 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: disconnected -> scanning
May 27 09:16:09 myhostname wpa_supplicant[8946]: wlan0: SME: Trying to authenticate with 00:18:f8:54:a3:d6 (SSID='myaccesspoint' freq=2437 MHz)
May 27 09:16:09 myhostname kernel: [11358.763968] wlan0: authenticate with 00:18:f8:54:a3:d6
May 27 09:16:09 myhostname kernel: [11358.765796] wlan0: send auth to 00:18:f8:54:a3:d6 (try 1/3)
May 27 09:16:09 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: scanning -> authenticating
May 27 09:16:09 myhostname wpa_supplicant[8946]: wlan0: Trying to associate with 00:18:f8:54:a3:d6 (SSID='myaccesspoint' freq=2437 MHz)
May 27 09:16:09 myhostname kernel: [11358.769957] wlan0: authenticated
May 27 09:16:09 myhostname kernel: [11358.770102] iwlwifi 0000:04:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP
May 27 09:16:09 myhostname kernel: [11358.770104] iwlwifi 0000:04:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
May 27 09:16:09 myhostname kernel: [11358.770846] wlan0: associate with 00:18:f8:54:a3:d6 (try 1/3)
May 27 09:16:09 myhostname kernel: [11358.773358] wlan0: RX AssocResp from 00:18:f8:54:a3:d6 (capab=0x411 status=12 aid=0)
May 27 09:16:09 myhostname kernel: [11358.773361] wlan0: 00:18:f8:54:a3:d6 denied association (code=12)
May 27 09:16:09 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: authenticating -> associating
May 27 09:16:09 myhostname wpa_supplicant[8946]: wlan0: CTRL-EVENT-ASSOC-REJECT bssid=00:18:f8:54:a3:d6 status_code=12
May 27 09:16:09 myhostname kernel: [11358.802187] wlan0: deauthenticating from 00:18:f8:54:a3:d6 by local choice (reason=3)
May 27 09:16:09 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: associating -> disconnected
May 27 09:16:09 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: disconnected -> scanning
May 27 09:16:12 myhostname wpa_supplicant[8946]: wlan0: SME: Trying to authenticate with 00:18:f8:54:a3:d6 (SSID='myaccesspoint' freq=2437 MHz)
May 27 09:16:12 myhostname kernel: [11362.573442] wlan0: authenticate with 00:18:f8:54:a3:d6
May 27 09:16:12 myhostname kernel: [11362.575270] wlan0: send auth to 00:18:f8:54:a3:d6 (try 1/3)
May 27 09:16:12 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: scanning -> authenticating
May 27 09:16:12 myhostname wpa_supplicant[8946]: wlan0: Trying to associate with 00:18:f8:54:a3:d6 (SSID='myaccesspoint' freq=2437 MHz)
May 27 09:16:12 myhostname kernel: [11362.580334] wlan0: authenticated
May 27 09:16:12 myhostname kernel: [11362.580503] iwlwifi 0000:04:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP
May 27 09:16:12 myhostname kernel: [11362.580516] iwlwifi 0000:04:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
May 27 09:16:12 myhostname kernel: [11362.583508] wlan0: associate with 00:18:f8:54:a3:d6 (try 1/3)
May 27 09:16:12 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: authenticating -> associating
May 27 09:16:12 myhostname wpa_supplicant[8946]: wlan0: Associated with 00:18:f8:54:a3:d6
May 27 09:16:12 myhostname kernel: [11362.585908] wlan0: RX AssocResp from 00:18:f8:54:a3:d6 (capab=0x411 status=0 aid=9)
May 27 09:16:12 myhostname kernel: [11362.586781] wlan0: associated
May 27 09:16:12 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: associating -> associated
May 27 09:16:13 myhostname kernel: [11362.947693] wlan0: deauthenticated from 00:18:f8:54:a3:d6 (Reason: 15)
May 27 09:16:13 myhostname wpa_supplicant[8946]: wlan0: CTRL-EVENT-DISCONNECTED bssid=00:18:f8:54:a3:d6 reason=15
May 27 09:16:13 myhostname kernel: [11362.973461] cfg80211: Calling CRDA to update world regulatory domain
May 27 09:16:13 myhostname kernel: [11362.975673] cfg80211: World regulatory domain updated:
May 27 09:16:13 myhostname kernel: [11362.975675] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
May 27 09:16:13 myhostname kernel: [11362.975676] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm)
May 27 09:16:13 myhostname kernel: [11362.975677] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm)
May 27 09:16:13 myhostname kernel: [11362.975678] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm)
May 27 09:16:13 myhostname kernel: [11362.975678] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz), (N/A, 2000 mBm)
May 27 09:16:13 myhostname kernel: [11362.975679] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm)
May 27 09:16:13 myhostname kernel: [11362.975679] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm)
May 27 09:16:13 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: associated -> disconnected
May 27 09:16:13 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: disconnected -> scanning
May 27 09:16:14 myhostname NetworkManager[13992]: <warn> Activation (wlan0/wireless): association took too long.
May 27 09:16:14 myhostname NetworkManager[13992]: <info> (wlan0): device state change: config -> failed (reason 'no-secrets') [50 120 7]
May 27 09:16:14 myhostname NetworkManager[13992]: <info> Marking connection 'Auto myaccesspoint' invalid.
May 27 09:16:14 myhostname NetworkManager[13992]: <warn> Activation (wlan0) failed for connection 'Auto myaccesspoint'
May 27 09:16:14 myhostname NetworkManager[13992]: <info> (wlan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
May 27 09:16:14 myhostname NetworkManager[13992]: <info> (wlan0): deactivating device (reason 'none') [0]
May 27 09:16:14 myhostname NetworkManager[13992]: <info> (wlan0): supplicant interface state: scanning -> disconnected

The things that jump out at me are "deauthenticating ... by local choice( reason=3)" and the lines that contain "(reason=15)".

I've tried various fixes:

• iwconfig wlan0 power off
• killing wpa_supplicant
• connecting with iwconfig + dhclient instead of gnome's network -manager
• explicitly configuring wlan0 in /etc/network/interfaces
• creating a /etc/wpa_supplicant.conf file

...but nothing seems to work.

I'm not sure what I did wrong, or what step I've skipped in trying to get wlan0 back as a non-bridged device -- I removed it from the bridge and then deleted the bridge itself.

Any ideas?