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BCM43142 wireless card drops connection after some time

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I know this question has been discussed in this forum but there is no concrete answer it seems. I have BCM43142 wireless card in my HP desktop(Ubuntu Desktop 14.04 LTS). Wifi works fine but after some time(after 6+ hours) - connection gets very slow and finally doesn't work.

# lspci | grep -i network 04:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01) 

Gone thru this thread and run the wireless script and here is the output

########## wireless info START ##########  Report from: 21 Feb 2016 19:27 MST -0700  Booted last: 21 Feb 2016 19:15 MST -0700  Script from: 27 Sep 2015 00:34 UTC +0000  ##### release ###########################  Distributor ID: Ubuntu Description:    Ubuntu 14.04.4 LTS Release:    14.04 Codename:   trusty  ##### kernel ############################  Linux 3.19.0-49-generic #55~14.04.1-Ubuntu SMP Fri Jan 22 11:24:31 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux  Parameters: ro, quiet, splash, vt.handoff=7  ##### desktop ###########################  sed: can't read /root/.dmrc: No such file or directory  Could not be determined.  ##### lspci #############################  03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 0c)     Subsystem: Hewlett-Packard Company Device [103c:2af3]     Kernel driver in use: r8169  04:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)     Subsystem: Hewlett-Packard Company Device [103c:2230]     Kernel driver in use: wl  ##### lsusb #############################  Bus 004 Device 002: ID 8087:8000 Intel Corp.  Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 002: ID 8087:8008 Intel Corp.  Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 046d:0825 Logitech, Inc. Webcam C270 Bus 001 Device 006: ID 0a5c:216c Broadcom Corp.  Bus 001 Device 005: ID 058f:6362 Alcor Micro Corp. Flash Card Reader/Writer Bus 001 Device 004: ID 0458:0146 KYE Systems Corp. (Mouse Systems)  Bus 001 Device 002: ID 0461:4e24 Primax Electronics, Ltd  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub  ##### PCMCIA card info ##################  ##### rfkill ############################  0: hci0: Bluetooth     Soft blocked: no     Hard blocked: no 1: phy0: Wireless LAN     Soft blocked: no     Hard blocked: no 2: brcmwl-0: Wireless LAN     Soft blocked: no     Hard blocked: no  ##### lsmod #############################  wl                   6369280  0  hp_wmi                 16384  0  sparse_keymap          16384  1 hp_wmi cfg80211              524288  1 wl wmi                    20480  1 hp_wmi  ##### interfaces ########################  auto lo iface lo inet loopback  ##### ifconfig ##########################  docker0   Link encap:Ethernet  HWaddr <MAC 'docker0' [IF]>             inet addr:172.17.42.1  Bcast:0.0.0.0  Mask:255.255.0.0           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:0            RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)  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)  vmnet1    Link encap:Ethernet  HWaddr <MAC 'vmnet1' [IF]>             inet addr:172.16.170.1  Bcast:172.16.170.255  Mask:255.255.255.0           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1           RX packets:0 errors:0 dropped:0 overruns:0 frame:0           TX packets:21 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000            RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)  vmnet8    Link encap:Ethernet  HWaddr <MAC 'vmnet8' [IF]>             inet addr:192.168.172.1  Bcast:192.168.172.255  Mask:255.255.255.0           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1           RX packets:0 errors:0 dropped:0 overruns:0 frame:0           TX packets:21 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]>             inet addr:192.168.0.105  Bcast:192.168.0.255  Mask:255.255.255.0           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1           RX packets:61457 errors:0 dropped:0 overruns:0 frame:19547           TX packets:41711 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000            RX bytes:71225715 (71.2 MB)  TX bytes:18230947 (18.2 MB)           Interrupt:19   ##### iwconfig ##########################  eth0      no wireless extensions.  vmnet1    no wireless extensions.  docker0   no wireless extensions.  vmnet8    no wireless extensions.  lo        no wireless extensions.  wlan0     IEEE 802.11abg  ESSID:"TP-LINK_536C"             Mode:Managed  Frequency:2.417 GHz  Access Point: <MAC 'TP-LINK_536C' [AC1]>              Bit Rate=72 Mb/s   Tx-Power=200 dBm              Retry short limit:7   RTS thr:off   Fragment thr:off           Encryption key:off           Power Management:off           Link Quality=70/70  Signal level=-38 dBm             Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0           Tx excessive retries:0  Invalid misc:0   Missed beacon:0  ##### route #############################  Kernel IP routing table Destination     Gateway         Genmask         Flags Metric Ref    Use Iface 0.0.0.0         192.168.0.1     0.0.0.0         UG    0      0        0 wlan0 172.16.170.0    0.0.0.0         255.255.255.0   U     0      0        0 vmnet1 172.17.0.0      0.0.0.0         255.255.0.0     U     0      0        0 docker0 192.168.0.0     0.0.0.0         255.255.255.0   U     9      0        0 wlan0 192.168.172.0   0.0.0.0         255.255.255.0   U     0      0        0 vmnet8  ##### resolv.conf #######################  nameserver 127.0.1.1  ##### network managers ##################  Installed:      NetworkManager  Running:  root      1269     1  0 19:15 ?        00:00:00 NetworkManager  ##### NetworkManager info ###############  NetworkManager Tool  State: connected (global)  - Device: wlan0  [TP-LINK_536C] ------------------------------------------------   Type:              802.11 WiFi   Driver:            wl   State:             connected   Default:           yes   HW Address:        <MAC 'wlan0' [IF]>    Capabilities:     Speed:           72 Mb/s    Wireless Properties     WEP Encryption:  yes     WPA Encryption:  yes     WPA2 Encryption: yes    Wireless Access Points (* = current AP)     Nitin:           Infra, <MAC 'Nitin' [AC5]>, Freq 2462 MHz, Rate 54 Mb/s, Strength 94 WPA WPA2     0493E6:          Infra, <MAC '0493E6' [AC2]>, Freq 2412 MHz, Rate 54 Mb/s, Strength 89 WPA WPA2     ChacheNetwork:   Infra, <MAC 'ChacheNetwork' [AC4]>, Freq 2462 MHz, Rate 54 Mb/s, Strength 79 WPA WPA2     HOME-EE12:       Infra, <MAC 'HOME-EE12' [AC3]>, Freq 2437 MHz, Rate 54 Mb/s, Strength 75 WPA WPA2     Satnam_N:        Infra, <MAC 'Satnam_N' [AN5]>, Freq 2427 MHz, Rate 54 Mb/s, Strength 70 WPA2     1C1106:          Infra, <MAC '1C1106' [AC6]>, Freq 2462 MHz, Rate 54 Mb/s, Strength 55 WPA WPA2     *TP-LINK_536C:   Infra, <MAC 'TP-LINK_536C' [AC1]>, Freq 2417 MHz, Rate 54 Mb/s, Strength 81 WPA WPA2    IPv4 Settings:     Address:         192.168.0.105     Prefix:          24 (255.255.255.0)     Gateway:         192.168.0.1      DNS:             192.168.0.1  - Device: eth0 -----------------------------------------------------------------   Type:              Wired   Driver:            r8169   State:             unavailable   Default:           no   HW Address:        <MAC 'eth0' [IF]>    Capabilities:     Carrier Detect:  yes    Wired Properties     Carrier:         off  ##### 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/TP-LINK_536C]] (600 root) [connection] id=TP-LINK_536C | type=802-11-wireless [802-11-wireless] ssid=TP-LINK_536C [ipv4] method=auto [ipv6] method=auto  [[/etc/NetworkManager/system-connections/TP-LINK_536C 1]] (600 root) [connection] id=TP-LINK_536C 1 | type=802-11-wireless [802-11-wireless] ssid=TP-LINK_536C | mac-address=<MAC 'wlan0' [IF]> [ipv6] method=auto [ipv4] method=auto  ##### iw reg get ########################  Region: America/Phoenix (based on set time zone)  country 00:     (2402 - 2472 @ 40), (3, 20)     (2457 - 2482 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS     (2474 - 2494 @ 20), (3, 20), NO-OFDM, PASSIVE-SCAN, NO-IBSS     (5170 - 5250 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS     (5735 - 5835 @ 40), (3, 20), PASSIVE-SCAN, NO-IBSS  ##### iwlist channels ###################  eth0      no frequency information.  vmnet1    no frequency information.  docker0   no frequency information.  vmnet8    no frequency information.  lo        no frequency information.  wlan0     26 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           Channel 36 : 5.18 GHz           Channel 38 : 5.19 GHz           Channel 40 : 5.2 GHz           Channel 42 : 5.21 GHz           Channel 44 : 5.22 GHz           Channel 46 : 5.23 GHz           Channel 48 : 5.24 GHz           Channel 149 : 5.745 GHz           Channel 153 : 5.765 GHz           Channel 157 : 5.785 GHz           Channel 161 : 5.805 GHz           Channel 165 : 5.825 GHz           Current Frequency:2.417 GHz (Channel 2)  ##### iwlist scan #######################  eth0      Interface doesn't support scanning.  vmnet1    Interface doesn't support scanning.  docker0   Interface doesn't support scanning.  vmnet8    Interface doesn't support scanning.  lo        Interface doesn't support scanning.  Channel occupancy:        1   APs on   Frequency:2.412 GHz (Channel 1)       1   APs on   Frequency:2.417 GHz (Channel 2)       1   APs on   Frequency:2.437 GHz (Channel 6)       3   APs on   Frequency:2.462 GHz (Channel 11)  wlan0     Scan completed :           Cell 01 - Address: <MAC 'TP-LINK_536C' [AC1]>                     Channel:2                     Frequency:2.417 GHz (Channel 2)                     Quality=70/70  Signal level=-39 dBm                       Encryption key:on                     ESSID:"TP-LINK_536C"                     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=0000000000000000                     Extra: Last beacon: 48ms 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           Cell 02 - Address: <MAC '0493E6' [AC2]>                     Channel:1                     Frequency:2.412 GHz (Channel 1)                     Quality=64/70  Signal level=-46 dBm                       Encryption key:on                     ESSID:"0493E6"                     Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s                               24 Mb/s; 36 Mb/s; 54 Mb/s                     Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s                     Mode:Master                     Extra:tsf=0000000000000000                     Extra: Last beacon: 48ms ago                     IE: IEEE 802.11i/WPA2 Version 1                         Group Cipher : TKIP                         Pairwise Ciphers (2) : CCMP TKIP                         Authentication Suites (1) : PSK                     IE: WPA Version 1                         Group Cipher : TKIP                         Pairwise Ciphers (2) : CCMP TKIP                         Authentication Suites (1) : PSK           Cell 03 - Address: <MAC 'HOME-EE12' [AC3]>                     Channel:6                     Frequency:2.437 GHz (Channel 6)                     Quality=59/70  Signal level=-51 dBm                       Encryption key:on                     ESSID:"HOME-EE12"                     Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s                               18 Mb/s; 36 Mb/s; 54 Mb/s                     Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s                     Mode:Master                     Extra:tsf=0000000000000000                     Extra: Last beacon: 48ms ago                     IE: WPA Version 1                         Group Cipher : TKIP                         Pairwise Ciphers (2) : TKIP CCMP                         Authentication Suites (1) : PSK                     IE: IEEE 802.11i/WPA2 Version 1                         Group Cipher : TKIP                         Pairwise Ciphers (2) : TKIP CCMP                         Authentication Suites (1) : PSK           Cell 04 - Address: <MAC 'ChacheNetwork' [AC4]>                     Channel:11                     Frequency:2.462 GHz (Channel 11)                     Quality=56/70  Signal level=-54 dBm                       Encryption key:on                     ESSID:"ChacheNetwork"                     Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s                               24 Mb/s; 36 Mb/s; 54 Mb/s                     Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s                     Mode:Master                     Extra:tsf=0000000000000000                     Extra: Last beacon: 48ms ago                     IE: IEEE 802.11i/WPA2 Version 1                         Group Cipher : TKIP                         Pairwise Ciphers (2) : CCMP TKIP                         Authentication Suites (1) : PSK                     IE: WPA Version 1                         Group Cipher : TKIP                         Pairwise Ciphers (2) : CCMP TKIP                         Authentication Suites (1) : PSK           Cell 05 - Address: <MAC 'Nitin' [AC5]>                     Channel:11                     Frequency:2.462 GHz (Channel 11)                     Quality=62/70  Signal level=-48 dBm                       Encryption key:on                     ESSID:"Nitin"                     Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s                               24 Mb/s; 36 Mb/s; 54 Mb/s                     Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s                     Mode:Master                     Extra:tsf=0000000000000000                     Extra: Last beacon: 48ms ago                     IE: IEEE 802.11i/WPA2 Version 1                         Group Cipher : TKIP                         Pairwise Ciphers (2) : CCMP TKIP                         Authentication Suites (1) : PSK                     IE: WPA Version 1                         Group Cipher : TKIP                         Pairwise Ciphers (2) : CCMP TKIP                         Authentication Suites (1) : PSK           Cell 06 - Address: <MAC '1C1106' [AC6]>                     Channel:11                     Frequency:2.462 GHz (Channel 11)                     Quality=45/70  Signal level=-65 dBm                       Encryption key:on                     ESSID:"1C1106"                     Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s                               24 Mb/s; 36 Mb/s; 54 Mb/s                     Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s                     Mode:Master                     Extra:tsf=0000000000000000                     Extra: Last beacon: 48ms ago                     IE: IEEE 802.11i/WPA2 Version 1                         Group Cipher : TKIP                         Pairwise Ciphers (2) : CCMP TKIP                         Authentication Suites (1) : PSK                     IE: WPA Version 1                         Group Cipher : TKIP                         Pairwise Ciphers (2) : CCMP TKIP                         Authentication Suites (1) : PSK  ##### module infos ######################  [wl] filename:       /lib/modules/3.19.0-49-generic/updates/dkms/wl.ko license:        MIXED/Proprietary srcversion:     9A49255BA90267D99664757 depends:        cfg80211 vermagic:       3.19.0-49-generic SMP mod_unload modversions  parm:           passivemode:int parm:           wl_txq_thresh:int parm:           oneonly:int parm:           piomode:int parm:           instance_base:int parm:           nompc:int parm:           intf_name:string  [cfg80211] filename:       /lib/modules/3.19.0-49-generic/kernel/net/wireless/cfg80211.ko description:    wireless configuration support license:        GPL author:         Johannes Berg srcversion:     EF182B558008C23DD85EF03 depends:         intree:         Y vermagic:       3.19.0-49-generic SMP mod_unload modversions  signer:         Magrathea: Glacier signing key sig_key:        A9:32:DC:23:78:95:A4:4D:39:59:BF:91:A3:56:6A:20:EE:21:1F:37 sig_hashalgo:   sha512 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 #################  [cfg80211] cfg80211_disable_40mhz_24ghz: N ieee80211_regdom: 00  ##### /etc/modules ######################  lp rtc  ##### modprobe options ##################  [/etc/modprobe.d/blacklist-ath_pci.conf] blacklist ath_pci  [/etc/modprobe.d/blacklist-bcm43.conf] blacklist b43 blacklist b43legacy blacklist ssb blacklist bcm43xx blacklist brcm80211 blacklist brcmfmac blacklist brcmsmac blacklist bcma  [/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-nouveau.conf] blacklist nouveau blacklist lbm-nouveau options nouveau modeset=0 alias nouveau off alias lbm-nouveau off  [/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  [/etc/modprobe.d/nouveau-kms.conf] options nouveau modeset=0 options nouveau modeset=0  [/etc/modprobe.d/vmware-fuse.conf] alias char-major-10-229 fuse  ##### rc.local ##########################  /opt/redislabs/sbin/systune.sh 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 0x14e4:0x4365 (wl) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'wlan0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"  ##### dmesg #############################  [   30.353103] bridge-wlan0: device is wireless, enabling SMAC [   30.353105] bridge-wlan0: up [   30.353107] bridge-wlan0: attached  ########## wireless info END ############ 

Also gone thru these threads: T1 T2 T3

But doesn't seem to work in my case. I need to reboot the system after every 6-8 hours.

And here is my settings-->Additional Driver BCM43142 wireless card drops connection after some time
As per that i am using the right driver but why it disconnects after 6-8 hours?

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