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Wifi disconnects after upgrading to 16.04

lundi 8 août 2016

########## wireless info START ##########

Report from: 06 Aug 2016 22:29 CEST +0200

Booted last: 06 Aug 2016 00:00 CEST +0200

Script from: 30 Apr 2015 17:23 UTC +0000

##### release ###########################

Distributor ID: Ubuntu
Description: Ubuntu 16.04.1 LTS
Release: 16.04
Codename: xenial

##### kernel ############################

Linux 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Parameters: ro, quiet, splash, vt.handoff=7

##### desktop ###########################

Ubuntu

##### lspci #############################

03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 03)
Subsystem: Gigabyte Technology Co., Ltd Motherboard [1458:e000]
Kernel driver in use: r8169

05:04.0 Network controller [0280]: Ralink corp. RT2561/RT61 802.11g PCI [1814:0301]
Subsystem: ASUSTeK Computer Inc. RT2561/RT61 802.11g PCI [1043:837e]
Kernel driver in use: rt61pci

##### lsusb #############################

Bus 002 Device 002: ID 058f:6377 Alcor Micro Corp. AU6375 4-LUN card reader
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 009 Device 006: ID 0f39:0671 TG3 Electronics
Bus 009 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 011 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 010 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 003: ID 046d:c317 Logitech, Inc. Wave Corded Keyboard
Bus 005 Device 002: ID 046d:c069 Logitech, Inc. M-U0007 [Corded Mouse M500]
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

##### PCMCIA card info ##################

##### rfkill ############################

0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no

##### lsmod #############################

rt61pci 32768 0
rt2x00pci 16384 1 rt61pci
rt2x00mmio 16384 1 rt61pci
rt2x00lib 57344 3 rt61pci,rt2x00pci,rt2x00mmio
mac80211 737280 2 rt2x00lib,rt2x00pci
cfg80211 565248 2 mac80211,rt2x00lib
eeprom_93cx6 16384 1 rt61pci
crc_itu_t 16384 1 rt61pci
mxm_wmi 16384 1 nouveau
wmi 20480 2 mxm_wmi,nouveau

##### interfaces ########################

auto lo
iface lo inet loopback

##### ifconfig ##########################

eth0 Link encap:Ethernet HWaddr <MAC 'eth0' [IF]>
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

wlan0 Link encap:Ethernet HWaddr <MAC 'wlan0' [IF]>
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:15534 errors:0 dropped:0 overruns:0 frame:0
TX packets:14688 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:11826693 (11.8 MB) TX bytes:2745823 (2.7 MB)

##### iwconfig ##########################

lo no wireless extensions.

eth0 no wireless extensions.

wlan0 IEEE 802.11bg ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on

##### route #############################

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface

##### resolv.conf #######################

nameserver 127.0.1.1

##### NetworkManager info ###############

GENERAL.DEVICE: wlan0
GENERAL.TYPE: wifi
GENERAL.NM-TYPE: NMDeviceWifi
GENERAL.VENDOR: Ralink corp.
GENERAL.PRODUCT: RT2561/RT61 802.11g PCI
GENERAL.DRIVER: rt61pci
GENERAL.DRIVER-VERSION: 4.4.0-31-generic
GENERAL.FIRMWARE-VERSION: 0.8
GENERAL.HWADDR: <MAC 'wlan0' [IF]>
GENERAL.MTU: 0
GENERAL.STATE: 50 (connecting (configuring))
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1e.0/0000:05:04.0/net/wlan0
GENERAL.IP-IFACE:
GENERAL.IS-SOFTWARE: no
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.NM-PLUGIN-MISSING: no
GENERAL.PHYS-PORT-ID: --
GENERAL.CONNECTION: MyWifi
GENERAL.CON-UUID: 553f0b2b-5a2d-47e7-bda2-aa3de6f506e7
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/8
GENERAL.METERED: unknown
CAPABILITIES.CARRIER-DETECT: no
CAPABILITIES.SPEED: unknown
CAPABILITIES.IS-SOFTWARE: no
WIFI-PROPERTIES.WEP: yes
WIFI-PROPERTIES.WPA: yes
WIFI-PROPERTIES.WPA2: yes
WIFI-PROPERTIES.TKIP: yes
WIFI-PROPERTIES.CCMP: yes
WIFI-PROPERTIES.AP: yes
WIFI-PROPERTIES.ADHOC: yes
WIFI-PROPERTIES.2GHZ: yes
WIFI-PROPERTIES.5GHZ: no
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{0}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]: 553f0b2b-5a2d-47e7-bda2-aa3de6f506e7 | MyWifi

GENERAL.DEVICE: eth0
GENERAL.TYPE: ethernet
GENERAL.NM-TYPE: NMDeviceEthernet
GENERAL.VENDOR: Realtek Semiconductor Co., Ltd.
GENERAL.PRODUCT: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (Motherboard)
GENERAL.DRIVER: r8169
GENERAL.DRIVER-VERSION: 2.3LK-NAPI
GENERAL.FIRMWARE-VERSION: rtl_nic/rtl8168d-2.fw
GENERAL.HWADDR: <MAC 'eth0' [IF]>
GENERAL.MTU: 1500
GENERAL.STATE: 20 (unavailable)
GENERAL.REASON: 2 (Device is now managed)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.1/0000:03:00.0/net/eth0
GENERAL.IP-IFACE:
GENERAL.IS-SOFTWARE: no
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.NM-PLUGIN-MISSING: no
GENERAL.PHYS-PORT-ID: --
GENERAL.CONNECTION: --
GENERAL.CON-UUID: --
GENERAL.CON-PATH: --
GENERAL.METERED: unknown
CAPABILITIES.CARRIER-DETECT: yes
CAPABILITIES.SPEED: unknown
CAPABILITIES.IS-SOFTWARE: no
WIRED-PROPERTIES.CARRIER: off
CONNECTIONS.AVAILABLE-CONNECTION-PATHS:

SSID BSSID MODE CHAN FREQ RATE SIGNAL BARS SECURITY ACTIVE *
MyWifi <MAC 'MyWifi' [AN1]> Infra 1 2412 MHz 54 Mbit/s 84 ▂▄▆█ WPA1 WPA2 no
MyWifi <MAC 'MyWifi' [AC1]> Infra 1 2412 MHz 54 Mbit/s 50 ▂▄__ WPA1 WPA2 no

##### NetworkManager.state ##############

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true

##### NetworkManager.conf ###############

[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq

[ifupdown]
managed=false

##### NetworkManager profiles ###########

[[/etc/NetworkManager/system-connections/MyWifi]] (600 root)
[connection] id=MyWifi | type=wifi | permissions=user:mitja:;
[wifi] mac-address=<MAC 'wlan0' [IF]> | mac-address-blacklist= | ssid=MyWifi
[ipv4] method=auto
[ipv6] method=auto

##### iw reg get ########################

Region: Europe/Ljubljana (based on set time zone)

country 00: DFS-UNSET
(2402 - 2472 @ 40), (N/A, 20), (N/A)
(2457 - 2482 @ 40), (N/A, 20), (N/A), NO-IR
(2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, NO-IR
(5170 - 5250 @ 80), (N/A, 20), (N/A), NO-IR
(5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, NO-IR
(5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, NO-IR
(5735 - 5835 @ 80), (N/A, 20), (N/A), NO-IR
(57240 - 63720 @ 2160), (N/A, 0), (N/A)

##### iwlist channels ###################

lo no frequency information.

eth0 no frequency information.

wlan0 14 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
Channel 14 : 2.484 GHz

##### iwlist scan #######################

Channel occupancy:

1 APs on Frequency:2.412 GHz (Channel 1)

lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.

wlan0 Scan completed :
Cell 01 - Address: <MAC 'MyWifi' [AC1]>
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=38/70 Signal level=-72 dBm
Encryption key:on
ESSID:"MyWifi"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=0000000c43d4e180
Extra: Last beacon: 1364ms ago
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: WPA Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK

##### module infos ######################

[rt61pci]
filename: /lib/modules/4.4.0-31-generic/kernel/drivers/net/wireless/rt2x00/rt61pci.ko
license: GPL
firmware: rt2661.bin
firmware: rt2561s.bin
firmware: rt2561.bin
description: Ralink RT61 PCI & PCMCIA Wireless LAN driver.
version: 2.3.0
author: http://ift.tt/1it2ovf
srcversion: 147116748700BC2C93D5888
depends: rt2x00lib,rt2x00mmio,rt2x00pci,eeprom_93cx6,crc-itu-t
intree: Y
vermagic: 4.4.0-31-generic SMP mod_unload modversions
parm: nohwcrypt:Disable hardware encryption. (bool)

[rt2x00pci]
filename: /lib/modules/4.4.0-31-generic/kernel/drivers/net/wireless/rt2x00/rt2x00pci.ko
license: GPL
description: rt2x00 pci library
version: 2.3.0
author: http://ift.tt/1it2ovf
srcversion: 543B84557258F153AC267F0
depends: rt2x00lib,mac80211
intree: Y
vermagic: 4.4.0-31-generic SMP mod_unload modversions

[rt2x00mmio]
filename: /lib/modules/4.4.0-31-generic/kernel/drivers/net/wireless/rt2x00/rt2x00mmio.ko
license: GPL
description: rt2x00 mmio library
version: 2.3.0
author: http://ift.tt/1it2ovf
srcversion: ADBE279820CFD0A1081C682
depends: rt2x00lib
intree: Y
vermagic: 4.4.0-31-generic SMP mod_unload modversions

[rt2x00lib]
filename: /lib/modules/4.4.0-31-generic/kernel/drivers/net/wireless/rt2x00/rt2x00lib.ko
license: GPL
description: rt2x00 library
version: 2.3.0
author: http://ift.tt/1it2ovf
srcversion: 72E39180D883A5541F66494
depends: mac80211,cfg80211
intree: Y
vermagic: 4.4.0-31-generic SMP mod_unload modversions

[mac80211]
filename: /lib/modules/4.4.0-31-generic/kernel/net/mac80211/mac80211.ko
license: GPL
description: IEEE 802.11 subsystem
srcversion: 2FFAEED0245CA1D97FE1E44
depends: cfg80211
intree: Y
vermagic: 4.4.0-31-generic SMP mod_unload modversions
parm: minstrel_vht_only:Use only VHT rates when VHT is supported by sta. (bool)
parm: max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int)
parm: max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int)
parm: beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int)
parm: probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int)
parm: ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp)

[cfg80211]
filename: /lib/modules/4.4.0-31-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: 25A45701AAA64DAC1E47D9D
depends:
intree: Y
vermagic: 4.4.0-31-generic SMP mod_unload modversions
parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)

##### module parameters #################

[rt61pci]
nohwcrypt: N

[mac80211]
beacon_loss_count: 7
ieee80211_default_rc_algo: minstrel_ht
max_nullfunc_tries: 2
max_probe_tries: 5
minstrel_vht_only: Y
probe_wait_ms: 500

[cfg80211]
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00

##### /etc/modules ######################

lp

##### modprobe options ##################

[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci

[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac

[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off

[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211

[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en

##### rc.local ##########################

rescuetime

exit 0

##### pm-utils ##########################

##### udev rules ########################

[/etc/udev/rules.d/70-persistent-net.rules]
# PCI device 0x10ec:0x8168 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'eth0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x1814:0x0301 (rt61pci)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'wlan0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"

##### dmesg #############################

[ 2660.604080] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2660.767961] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2661.208058] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2661.372081] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2661.540057] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2661.700152] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2662.136156] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2662.300023] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2662.476241] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2662.636132] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2663.076170] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2663.236135] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2663.400131] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2663.564137] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2664.008129] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2664.168126] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2664.336232] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2664.496226] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2664.572668] wlan0: deauthenticated from <MAC 'MyWifi' [AN1]> (Reason: 6=CLASS2_FRAME_FROM_NONAUTH_STA)
[ 2664.820211] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2664.984295] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2665.013695] wlan0: authenticate with <MAC 'MyWifi' [AN1]>
[ 2665.025513] wlan0: send auth to <MAC 'MyWifi' [AN1]> (try 1/3)
[ 2665.228238] wlan0: send auth to <MAC 'MyWifi' [AN1]> (try 2/3)
[ 2665.436279] wlan0: send auth to <MAC 'MyWifi' [AN1]> (try 3/3)
[ 2665.640207] wlan0: authentication with <MAC 'MyWifi' [AN1]> timed out
[ 2665.832395] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2665.996286] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2667.025451] wlan0: authenticate with <MAC 'MyWifi' [AC1]>
[ 2667.184407] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2667.352425] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2667.361209] wlan0: send auth to <MAC 'MyWifi' [AC1]> (try 1/3)
[ 2667.564366] wlan0: send auth to <MAC 'MyWifi' [AC1]> (try 2/3)
[ 2667.768358] wlan0: send auth to <MAC 'MyWifi' [AC1]> (try 3/3)
[ 2667.972328] wlan0: authentication with <MAC 'MyWifi' [AC1]> timed out
[ 2668.180419] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2668.348397] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2668.608442] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2668.776432] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2668.948376] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2669.108469] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2670.196803] wlan0: authenticate with <MAC 'MyWifi' [AN1]>
[ 2670.368480] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2670.532466] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2670.541605] wlan0: send auth to <MAC 'MyWifi' [AN1]> (try 1/3)
[ 2670.744536] wlan0: send auth to <MAC 'MyWifi' [AN1]> (try 2/3)
[ 2670.948529] wlan0: send auth to <MAC 'MyWifi' [AN1]> (try 3/3)
[ 2671.152576] wlan0: authentication with <MAC 'MyWifi' [AN1]> timed out
[ 2671.344572] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2671.508531] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2676.704851] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2676.864867] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2681.279730] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 2681.509135] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2681.673110] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2681.836988] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2682.001381] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2683.065839] wlan0: authenticate with <MAC 'MyWifi' [AC1]>
[ 2683.249175] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2683.417062] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2683.425807] wlan0: send auth to <MAC 'MyWifi' [AC1]> (try 1/3)
[ 2683.629096] wlan0: send auth to <MAC 'MyWifi' [AC1]> (try 2/3)
[ 2683.833170] wlan0: send auth to <MAC 'MyWifi' [AC1]> (try 3/3)
[ 2684.037179] wlan0: authentication with <MAC 'MyWifi' [AC1]> timed out
[ 2684.229164] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2684.393155] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2689.557461] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2689.721444] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2689.881457] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2690.045461] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2691.281618] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2691.441621] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2696.277749] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2696.441880] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2696.605782] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2696.777855] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2697.854282] wlan0: authenticate with <MAC 'MyWifi' [AN1]>
[ 2698.029924] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2698.201895] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2698.210431] wlan0: send auth to <MAC 'MyWifi' [AN1]> (try 1/3)
[ 2698.413864] wlan0: send auth to <MAC 'MyWifi' [AN1]> (try 2/3)
[ 2698.617886] wlan0: send auth to <MAC 'MyWifi' [AN1]> (try 3/3)
[ 2698.821902] wlan0: authentication with <MAC 'MyWifi' [AN1]> timed out
[ 2699.017916] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2699.181906] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2700.798042] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2700.962016] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush
[ 2701.126003] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 0 failed to flush
[ 2701.290079] ieee80211 phy0: rt2x00queue_flush_queue: Warning - Queue 2 failed to flush

########## wireless info END ############

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Wifi disconnects after upgrading to 16.04

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