BCM43142 WiFi adapter doesn't work on Ubuntu 20.04

Question

WiFi doesn't work and I'm getting "no WiFi adapter found" error.

Results of network info script:

########## wireless info START ##########
Report from: 01 Sep 2020 14:55 +03 +0300
Booted last: 01 Sep 2020 00:00 +03 +0300
Script from: 22 Oct 2018 03:34 UTC +0000
release
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.1 LTS
Release:    20.04
Codename:   focal
kernel
Linux 5.4.0-42-generic #46-Ubuntu SMP Fri Jul 10 00:24:02 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=7
desktop
Ubuntu
lspci
01:00.1 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 12)
    Subsystem: Acer Incorporated [ALI] RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [1025:0866]
    Kernel driver in use: r8169
02:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM43142 802.11b/g/n [14e4:4365] (rev 01)
    Subsystem: Lite-On Communications Inc BCM43142 802.11b/g/n [11ad:6645]
    Kernel modules: wl
lsusb
Bus 001 Device 002: ID 8087:8000 Intel Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 003: ID 04f2:b452 Chicony Electronics Co., Ltd HD WebCam
Bus 002 Device 002: ID 04ca:2009 Lite-On Technology Corp. BCM43142A0
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
PCMCIA card info
rfkill
0: acer-wireless: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: acer-bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: no
6: hci0: Bluetooth
    Soft blocked: yes
    Hard blocked: no
secure boot
SecureBoot enabled
lsmod
cfg80211              704512  0
acer_wmi               24576  0
wmi_bmof               16384  0
sparse_keymap          16384  1 acer_wmi
mxm_wmi                16384  1 nouveau
wmi                    32768  4 acer_wmi,wmi_bmof,mxm_wmi,nouveau
video                  49152  3 acer_wmi,i915,nouveau
interfaces
ifconfig
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback <MAC address> brd <MAC address>
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp1s0f1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether <MAC 'enp1s0f1' [IF1]> brd <MAC address>
iwconfig
enp1s0f1  no wireless extensions.
lo        no wireless extensions.
route
resolv.conf
[777 root '/etc/resolv.conf' -> '../run/systemd/resolve/stub-resolv.conf']
nameserver 127.0.0.53
options edns0
network managers
Installed:
NetworkManager


Running:
root         702       1  0 Aug31 ?        00:00:01 /usr/sbin/NetworkManager --no-daemon
NetworkManager info
GENERAL.DEVICE:                         enp1s0f1
GENERAL.TYPE:                           ethernet
GENERAL.NM-TYPE:                        NMDeviceEthernet
GENERAL.DBUS-PATH:                      /org/freedesktop/NetworkManager/Devices/2
GENERAL.VENDOR:                         Realtek Semiconductor Co., Ltd.
GENERAL.PRODUCT:                        RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
GENERAL.DRIVER:                         r8169
GENERAL.DRIVER-VERSION:                 --
GENERAL.FIRMWARE-VERSION:               --
GENERAL.HWADDR:                         <MAC 'enp1s0f1' [IF1]>
GENERAL.MTU:                            1500
GENERAL.STATE:                          20 (unavailable)
GENERAL.REASON:                         2 (Device is now managed)
GENERAL.IP4-CONNECTIVITY:               1 (none)
GENERAL.IP6-CONNECTIVITY:               1 (none)
GENERAL.UDI:                            /sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.1/net/enp1s0f1
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:                     1000 Mb/s
CAPABILITIES.IS-SOFTWARE:               no
CAPABILITIES.SRIOV:                     no
INTERFACE-FLAGS.UP:                     yes
INTERFACE-FLAGS.LOWER-UP:               no
INTERFACE-FLAGS.CARRIER:                no
WIRED-PROPERTIES.CARRIER:               off
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: --
NetworkManager.state
cat: /var/lib/NetworkManager/NetworkManager.state: Permission denied
NetworkManager config
[[/etc/NetworkManager/conf.d/default-wifi-powersave-on.conf]]
[connection]
wifi.powersave = 3
[[/etc/NetworkManager/NetworkManager.conf]]
[main]
plugins=ifupdown,keyfile
[ifupdown]
managed=false
[device]
wifi.scan-rand-mac-address=no
[[/usr/lib/NetworkManager/conf.d/10-dns-resolved.conf]]
[main]
dns=systemd-resolved
[[/usr/lib/NetworkManager/conf.d/10-globally-managed-devices.conf]]
[keyfile]
unmanaged-devices=*,except:type:wifi,except:type:gsm,except:type:cdma
[[/usr/lib/NetworkManager/conf.d/20-connectivity-ubuntu.conf]]
[connectivity]
uri=http://connectivity-check.ubuntu.com/
[[/usr/lib/NetworkManager/conf.d/no-mac-addr-change.conf]]
[device-mac-addr-change-wifi]
match-device=driver:rtl8723bs,driver:rtl8189es,driver:r8188eu,driver:8188eu,driver:eagle_sdio,driver:wl
wifi.scan-rand-mac-address=no
NetworkManager profiles
Netplan config
[/etc/netplan/01-network-manager-all.yaml]
network:
  version: 2
  renderer: NetworkManager
iw reg get
Region: Asia/Riyadh (based on set time zone)
global
country 00: DFS-UNSET
    (2402 - 2472 @ 40), (N/A, 20), (N/A)
    (2457 - 2482 @ 20), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
    (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN
    (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
    (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN
    (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN
    (5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN
    (57240 - 63720 @ 2160), (N/A, 0), (N/A)
iwlist channels
enp1s0f1  no frequency information.
lo        no frequency information.
iwlist scan
enp1s0f1  Interface doesn't support scanning.
lo        Interface doesn't support scanning.
module infos
[cfg80211]
filename:       /lib/modules/5.4.0-42-generic/kernel/net/wireless/cfg80211.ko
description:    wireless configuration support
license:        GPL
author:         Johannes Berg
srcversion:     2369BA84B34843FE73A01F4
depends:

retpoline:      Y
intree:         Y
name:           cfg80211
vermagic:       5.4.0-42-generic SMP mod_unload 
sig_id:         PKCS#7
signer:         Build time autogenerated kernel key
sig_key:        02:B6:04:06:D9:82:F4:38:95:E4:6F:84:9F:1D:B4:8E:C5:85:90:8B
sig_hashalgo:   sha512
signature:      11:09:20:94:BE:F4:40:A6:FA:D0:3E:51:A8:D4:D2:61:63:79:98:EB:
        10:58:65:0E:8E:46:FF:83:C3:09:4D:0D:4E:43:FF:34:22:F3:75:27:
        0C:0C:C2:CC:1D:94:31:F0:20:B9:61:67:C9:7C:B4:64:FD:F6:76:2F:
        90:66:77:66:E4:CD:48:E9:0A:AA:2D:4C:AB:65:64:6C:0E:B8:FE:80:
        29:21:79:61:2D:DE:8B:C2:7F:A5:6D:DD:B8:22:E7:4C:5E:DB:36:17:
        98:BE:79:AC:F2:32:15:A4:1A:A5:F3:7D:53:27:44:66:05:C1:4D:9E:
        B4:42:CF:CF:B6:D3:5E:76:51:CD:FE:49:CB:88:40:18:05:12:03:3B:
        C7:00:6A:E2:C2:67:CF:BD:42:FF:1D:7A:22:73:6B:13:85:1C:40:E3:
        2E:66:00:D2:99:A3:DC:1F:21:AB:2F:E4:DB:02:74:83:5B:6D:B7:AE:
        D8:35:05:4D:8F:99:27:08:8D:7A:C8:F3:E8:70:7B:B2:C3:0F:59:B6:
        4F:8F:F4:FE:02:1C:10:A5:60:27:F0:B4:9D:49:00:47:55:BB:14:73:
        4F:25:B1:41:AC:F3:E7:C7:C9:0E:3A:2A:B1:8E:81:B9:8D:29:C9:4E:
        58:BA:82:AC:EB:D2:EA:30:BB:90:F0:72:A4:38:8A:D2:81:65:1B:FB:
        D3:D8:C9:F5:41:3F:5B:9F:AB:76:C0:F4:3D:44:C1:B4:1D:7B:75:0B:
        C6:70:E0:E9:83:D8:33:A7:FE:DB:A0:B1:97:B1:12:26:F7:22:CB:99:
        A8:77:A3:EA:3A:DF:A8:8C:82:64:9F:5B:CD:34:E2:1F:79:09:03:C8:
        3B:F5:A7:20:CA:B2:8C:EF:C6:50:1F:A2:1F:11:21:91:50:6E:6F:A9:
        89:00:5C:4D:84:9D:07:09:BC:A9:2E:B5:F0:1E:BB:75:D7:8E:9C:20:
        8A:6F:40:DD:7E:40:54:38:09:A3:8B:C2:3C:7B:0A:0F:7E:7E:F3:86:
        33:CE:FF:D7:54:5F:89:E4:FE:BB:0F:A2:46:65:20:CE:CC:88:5B:53:
        CF:C9:AD:14:9C:FD:0C:6C:F2:A6:2E:DF:B0:E5:7D:A5:28:B1:9F:ED:
        12:31:4C:BD:DD:15:F3:A3:13:61:5A:FD:51:3C:7B:3F:5B:9F:D5:C9:
        74:B4:2B:F3:6D:6B:96:48:06:29:63:50:1C:6A:3F:F8:C5:43:D4:B1:
        A6:D8:00:1D:D8:A1:BF:B4:66:05:36:3A:E5:9F:BC:8E:F9:A4:F1:31:
        E1:8D:1C:DF:F5:27:19:95:38:73:DE:FF:D1:81:D5:B7:37:D2:B1:81:
        F9:0C:71:F5:5C:30:FF:47:DB:F2:A6:7D
parm:           bss_entries_limit:limit to number of scan BSS entries (per wiphy, default 1000) (int)
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]
bss_entries_limit: 1000
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00
/etc/modules
modprobe options
[/etc/modprobe.d/amd64-microcode-blacklist.conf]
blacklist microcode
[/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 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/intel-microcode-blacklist.conf]
blacklist microcode
[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi 

(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) 

&& /sbin/modprobe -r mac80211
rc.local
grep: /etc/rc.local: No such file or directory
pm-utils
udev rules
dmesg
[ 5426.988330] r8169 0000:01:00.1 enp1s0f1: Link is Down
[ 7457.323889] bluetooth hci0: Direct firmware load for brcm/BCM43142A0-04ca-2009.hcd failed with error -2
[ 7457.323893] Bluetooth: hci0: BCM: Patch brcm/BCM43142A0-04ca-2009.hcd not found
[ 7459.563934] r8169 0000:01:00.1 enp1s0f1: Link is Down
########## wireless info END ############

score 5 · Accepted Answer · answered Sep 01 '20 at 14:56

5

Please note in your paste:

##### secure boot #######################
SecureBoot enabled

In the most voted answer for Broadcom drivers, it says:

NOTE In some computers, before performing the commands, you will need to deactivate the Secure Boot Options in your BIOS. This applies for cases, for example, where the bcmwl-kernel-source is already installed but the driver does not yet work. You can do a reinstall like so, or disable Secure Boot by going to your BIOS Setup:

sudo apt-get install --reinstall bcmwl-kernel-source

I suggest that you get an internet connection by ethernet, tethering or whatever means possible and reinstall a perhaps presigned version of the driver as above. If this doesn't help, try disabling secure boot in your computers EFI/BIOS.

answered Sep 01 '20 at 14:56

chili555

60,188

1

I was facing the same issue with Ubuntu 22.04 LTS installation. This solution works for me. – Dinkar Jain Jun 29 '23 at 23:53
@DinkarJain Which one? The package re-installation or the secure boot disabling? – David Ferenczy Rogožan Oct 27 '23 at 17:54
disabling secure boot – Linas Feb 22 '24 at 00:54

score 0 · Answer 2 · answered Dec 21 '23 at 18:13

I had to go in the Bios and disable Secure Boot first (was reset for some reason) with F10.

Then sudo apt-get install --reinstall bcmwl-kernel-source (no need for me).

The broadcom open source driver appears to be unsigned and is thus blocked by the UEFI secure boot process.

2017561-1 · Answer 3 · 2024-01-01T03:46:51.267

Solution from @pushStack requires internet connection. I fixed my internet connection with the package bcmwl-kernel-source in the installation ISO. If you have no internet access you can refer to the official ubuntu documentation. https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx Install the packages bcmwl-kernel-source from a Terminal (in the commands below the install media is mounted at /cdrom

../pool/restricted/b/bcmwl
cd /cdrom/pool/restricted/b/bcmwl
sudo dpkg -i bcmwl-kernel-source*

BCM43142 WiFi adapter doesn't work on Ubuntu 20.04

release

kernel

desktop

lspci

lsusb

PCMCIA card info

rfkill

secure boot

lsmod

interfaces

ifconfig

iwconfig

route

resolv.conf

network managers

NetworkManager info

NetworkManager.state

NetworkManager config

NetworkManager profiles

Netplan config

iw reg get

iwlist channels

iwlist scan

module infos

module parameters

/etc/modules

modprobe options

rc.local

pm-utils

udev rules

dmesg

3 Answers3

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