Public bug reported:

After upgrade from 18.04 to focal 20.04 it was working. The additional
broadcom driver was listed in the proprietary "Additional Drivers" tab
of Software & Update manager. After reboot, wifi stopped working and the
driver no more was listed in the Additional Drivers" tab.

Drivers broadcom-sta* also not working.
Purge and reinstall bcmwl not work.
rfkill not work.
secure boot is disabled.


dmesg
[  244.329685] cfg80211: Loading compiled-in X.509 certificates for regulatory 
database
[  244.335290] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[  244.351067] wl driver 6.30.223.271 (r587334) failed with code 1
[  244.351069] ERROR @wl_cfg80211_detach : 
[  244.351070] NULL ndev->ieee80211ptr, unable to deref wl


sudo lspci -v
01:00.0 Network controller: Broadcom Inc. and subsidiaries BCM4360 802.11ac 
Wireless Network Adapter (rev 03)
        Subsystem: Broadcom Inc. and subsidiaries BCM4360 802.11ac Wireless 
Network Adapter
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Memory at f6100000 (64-bit, non-prefetchable) [size=32K]
        Capabilities: [48] Power Management version 3
        Capabilities: [58] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [68] Vendor Specific Information: Len=44 <?>
        Capabilities: [ac] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [13c] Device Serial Number 00-00-00-ff-ff-00-00-00
        Capabilities: [150] Power Budgeting <?>
        Capabilities: [160] Virtual Channel
        Capabilities: [1b0] Latency Tolerance Reporting
        Kernel modules: bcma, wl


cat /etc/modprobe.d/blacklist.conf
blacklist b43
blacklist b43legacy
blacklist b44
blacklist brcm80211
blacklist brcmsmac
blacklist ssb
blacklist bcm43
blacklist bcm43xx
blacklist ndiswrapper
blacklist bcma


sudo lshw -C network
  *-network DISPONÍVEL      
       descrição: Network controller
       produto: BCM4360 802.11ac Wireless Network Adapter
       fabricante: Broadcom Inc. and subsidiaries
       ID físico: 0
       informações do barramento: pci@0000:01:00.0
       versão: 03
       largura: 64 bits
       clock: 33MHz
       capacidades: pm msi pciexpress bus_master cap_list
       configuração: latency=0
       recursos: memória:f6100000-f6107fff


sudo hwinfo --netcard
15: PCI 100.0: 0280 Network controller
  [Created at pci.386]
  Unique ID: VCu0.FmxE7Ki8dh2
  Parent ID: vSkL.OXv6hi5TXAE
  SysFS ID: /devices/pci0000:00/0000:00:01.0/0000:01:00.0
  SysFS BusID: 0000:01:00.0
  Hardware Class: network
  Model: "Broadcom BCM4360 802.11ac Wireless Network Adapter"
  Vendor: pci 0x14e4 "Broadcom"
  Device: pci 0x4360 "BCM4360 802.11ac Wireless Network Adapter"
  SubVendor: pci 0x14e4 "Broadcom"
  SubDevice: pci 0x4360 
  Revision: 0x03
  Memory Range: 0xf6100000-0xf6107fff (rw,non-prefetchable)
  IRQ: 16 (no events)
  Module Alias: "pci:v000014E4d00004360sv000014E4sd00004360bc02sc80i00"
  Driver Info #0:
    Driver Status: bcma is not active
    Driver Activation Cmd: "modprobe bcma"
  Driver Info #1:
    Driver Status: wl is active
    Driver Activation Cmd: "modprobe wl"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #13 (PCI bridge)


sudo modinfo wl
filename:       /lib/modules/5.4.0-31-generic/updates/dkms/wl.ko
license:        MIXED/Proprietary
srcversion:     00D38A27B7E3C7B97C238FC
alias:          pci:v*d*sv*sd*bc02sc80i*
depends:        cfg80211
retpoline:      Y
name:           wl
vermagic:       5.4.0-31-generic SMP mod_unload 
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


iwconfig 
lo        no wireless extensions.
enp3s0    no wireless extensions.


bootctl
Couldn't find EFI system partition. It is recommended to mount it to /boot or 
/efi.
Alternatively, use --esp-path= to specify path to mount point.
System:
    Not booted with EFI


sudo systemctl list-unit-files --state=enabled
UNIT FILE                                                  STATE   VENDOR PRESET
snap-canonical\x2dlivepatch-94.mount                       enabled enabled      
snap-canonical\x2dlivepatch-95.mount                       enabled enabled      
snap-chromium\x2dffmpeg-13.mount                           enabled enabled      
snap-chromium\x2dffmpeg-15.mount                           enabled enabled      
snap-core-8935.mount                                       enabled enabled      
snap-core-9066.mount                                       enabled enabled      
snap-core18-1705.mount                                     enabled enabled      
snap-core18-1754.mount                                     enabled enabled      
snap-deadbeef\x2dvs-4.mount                                enabled enabled      
snap-deadbeef\x2dvs-5.mount                                enabled enabled      
snap-freecad-8.mount                                       enabled enabled      
snap-gimp-246.mount                                        enabled enabled      
snap-gimp-252.mount                                        enabled enabled      
snap-gnome\x2d3\x2d26\x2d1604-97.mount                     enabled enabled      
snap-gnome\x2d3\x2d26\x2d1604-98.mount                     enabled enabled      
snap-gnome\x2d3\x2d28\x2d1804-110.mount                    enabled enabled      
snap-gnome\x2d3\x2d28\x2d1804-116.mount                    enabled enabled      
snap-gnome\x2d3\x2d34\x2d1804-33.mount                     enabled enabled      
snap-gnome\x2dcharacters-495.mount                         enabled enabled      
snap-gnome\x2dcharacters-539.mount                         enabled enabled      
snap-gnome\x2dlogs-100.mount                               enabled enabled      
snap-gnome\x2dlogs-93.mount                                enabled enabled      
snap-gnome\x2dsystem\x2dmonitor-135.mount                  enabled enabled      
snap-gnome\x2dsystem\x2dmonitor-145.mount                  enabled enabled      
snap-google\x2dplay\x2dmusic\x2ddesktop\x2dplayer-72.mount enabled enabled      
snap-google\x2dplay\x2dmusic\x2ddesktop\x2dplayer-80.mount enabled enabled      
snap-gtk2\x2dcommon\x2dthemes-5.mount                      enabled enabled      
snap-gtk2\x2dcommon\x2dthemes-9.mount                      enabled enabled      
snap-gtk\x2dcommon\x2dthemes-1502.mount                    enabled enabled      
snap-gtk\x2dcommon\x2dthemes-1506.mount                    enabled enabled      
snap-opera-74.mount                                        enabled enabled      
snap-opera-75.mount                                        enabled enabled      
snap-vlc-1397.mount                                        enabled enabled      
snap-vlc-1620.mount                                        enabled enabled      
acpid.path                                                 enabled enabled      
apport-autoreport.path                                     enabled enabled      
cups.path                                                  enabled enabled      
accounts-daemon.service                                    enabled enabled      
anacron.service                                            enabled enabled      
apparmor.service                                           enabled enabled      
atd.service                                                enabled enabled      
[email protected]                                            enabled enabled      
avahi-daemon.service                                       enabled enabled      
bluetooth.service                                          enabled enabled      
console-setup.service                                      enabled enabled      
cron.service                                               enabled enabled      
cups-browsed.service                                       enabled enabled      
cups.service                                               enabled enabled      
dbus-fi.w1.wpa_supplicant1.service                         enabled enabled      
dbus-org.bluez.service                                     enabled enabled      
dbus-org.freedesktop.Avahi.service                         enabled enabled      
dbus-org.freedesktop.ModemManager1.service                 enabled enabled      
dbus-org.freedesktop.nm-dispatcher.service                 enabled enabled      
dbus-org.freedesktop.resolve1.service                      enabled enabled      
dbus-org.freedesktop.thermald.service                      enabled enabled      
dbus-org.freedesktop.timesync1.service                     enabled enabled      
dmesg.service                                              enabled enabled      
dns-clean.service                                          enabled enabled      
e2scrub_reap.service                                       enabled enabled      
gerbera.service                                            enabled enabled      
[email protected]                                             enabled enabled      
gpu-manager.service                                        enabled enabled      
grub-initrd-fallback.service                               enabled enabled      
irqbalance.service                                         enabled enabled      
kerneloops.service                                         enabled enabled      
keyboard-setup.service                                     enabled enabled      
ModemManager.service                                       enabled enabled      
network-manager.service                                    enabled enabled      
networkd-dispatcher.service                                enabled enabled      
networking.service                                         enabled enabled      
NetworkManager-dispatcher.service                          enabled enabled      
NetworkManager-wait-online.service                         enabled enabled      
NetworkManager.service                                     enabled enabled      
nmbd.service                                               enabled enabled      
ondemand.service                                           enabled enabled      
openvpn.service                                            enabled enabled      
plexmediaserver.service                                    enabled enabled      
pppd-dns.service                                           enabled enabled      
rsync.service                                              enabled enabled      
rsyslog.service                                            enabled enabled      
secureboot-db.service                                      enabled enabled      
setvtrgb.service                                           enabled enabled      
smbd.service                                               enabled enabled      
snap.canonical-livepatch.canonical-livepatchd.service      enabled enabled      
snapd.apparmor.service                                     enabled enabled      
snapd.autoimport.service                                   enabled enabled      
snapd.core-fixup.service                                   enabled enabled      
snapd.recovery-chooser-trigger.service                     enabled enabled      
snapd.seeded.service                                       enabled enabled      
snapd.service                                              enabled enabled      
snapd.system-shutdown.service                              enabled enabled      
spice-vdagent.service                                      enabled enabled      
spice-vdagentd.service                                     enabled enabled      
switcheroo-control.service                                 enabled enabled      
syslog.service                                             enabled enabled      
systemd-pstore.service                                     enabled enabled      
systemd-resolved.service                                   enabled enabled      
systemd-timesyncd.service                                  enabled enabled      
thermald.service                                           enabled enabled      
tor.service                                                enabled enabled      
udisks2.service                                            enabled enabled      
ufw.service                                                enabled enabled      
unattended-upgrades.service                                enabled enabled      
ureadahead.service                                         enabled enabled      
warsaw.service                                             enabled enabled      
whoopsie.service                                           enabled enabled      
wpa_supplicant.service                                     enabled enabled      
acpid.socket                                               enabled enabled      
apport-forward.socket                                      enabled enabled      
avahi-daemon.socket                                        enabled enabled      
cups.socket                                                enabled enabled      
snapd.socket                                               enabled enabled      
uuidd.socket                                               enabled enabled      
remote-fs.target                                           enabled enabled      
anacron.timer                                              enabled enabled      
apt-daily-upgrade.timer                                    enabled enabled      
apt-daily.timer                                            enabled enabled      
e2scrub_all.timer                                          enabled enabled      
fstrim.timer                                               enabled enabled      
fwupd-refresh.timer                                        enabled enabled      
logrotate.timer                                            enabled enabled      
man-db.timer                                               enabled enabled      
motd-news.timer                                            enabled enabled      
snapd.snap-repair.timer                                    enabled enabled  


uname -a
Linux pc 5.4.0-31-generic #35-Ubuntu SMP Thu May 7 20:20:34 UTC 2020 x86_64 
x86_64 x86_64 GNU/Linux

sudo lsb_release -a
LSB Version:    
core-11.1.0ubuntu2-noarch:printing-11.1.0ubuntu2-noarch:security-11.1.0ubuntu2-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 20.04 LTS
Release:        20.04
Codename:       focal

apt-cache policy bcmwl-kernel-source 
bcmwl-kernel-source:
  Instalado: 6.30.223.271+bdcom-0ubuntu5
  Candidato: 6.30.223.271+bdcom-0ubuntu5
  Tabela de versão:
 *** 6.30.223.271+bdcom-0ubuntu5 500
        500 http://archive.ubuntu.com/ubuntu focal/restricted amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: bcmwl-kernel-source 6.30.223.271+bdcom-0ubuntu5
ProcVersionSignature: Ubuntu 5.4.0-31.35-generic 5.4.34
Uname: Linux 5.4.0-31-generic x86_64
NonfreeKernelModules: wl nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
Date: Tue May 19 14:56:31 2020
InstallationDate: Installed on 2018-08-11 (647 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcEnviron:
 LANGUAGE=pt_BR:pt:en
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=pt_BR.UTF-8
 SHELL=/bin/bash
SourcePackage: bcmwl
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: bcmwl (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

** Attachment added: "Screeshot when it was working good"
   
https://bugs.launchpad.net/bugs/1879547/+attachment/5374283/+files/Captura%20de%20tela%20de%202020-05-17%2014-26-54.png

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https://bugs.launchpad.net/bugs/1879547

Title:
  wl driver 6.30.223.271 (r587334) failed with code 1

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