Problème Wifi Bradcom BCM 43228

[code]

>>    lsb_release -a

Distributor ID:	Ubuntu
Description:	Ubuntu 20.04.1 LTS
Release:	20.04
Codename:	focal

>>    lsusb 

Bus 002 Device 002: ID 8087:8000 Intel Corp. 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:8008 Intel Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 04f2:b3ed Chicony Electronics Co., Ltd HP HD Webcam
Bus 003 Device 002: ID 138a:003f Validity Sensors, Inc. VFS495 Fingerprint Reader
Bus 003 Device 004: ID 0a5c:21f1 Broadcom Corp. HP Portable Bumble Bee
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

>>    lspci -k -nn | grep -A 3 -i net 

00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection I217-V [8086:153b] (rev 04)
	Subsystem: Hewlett-Packard Company Ethernet Connection I217-V [103c:1993]
	Kernel driver in use: e1000e
	Kernel modules: e1000e
00:1a.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 [8086:8c2d] (rev 04)
--
02:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM43228 802.11a/b/g/n [14e4:4359]
	DeviceName: WLAN
	Subsystem: Broadcom Inc. and subsidiaries BCM43228 802.11a/b/g/n [14e4:05e2]
	Kernel modules: bcma

>>    sudo lshw -C network 

  *-network
       description: Ethernet interface
       produit: Ethernet Connection I217-V
       fabricant: Intel Corporation
       identifiant matériel: 19
       information bus: pci@0000:00:19.0
       nom logique: enp0s25
       version: 04
       numéro de série: b0:5a:da:b1:8f:29
       taille: 1Gbit/s
       capacité: 1Gbit/s
       bits: 32 bits
       horloge: 33MHz
       fonctionnalités: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration : autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k duplex=full firmware=0.12-3 ip=192.168.1.86 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
       ressources : irq:28 mémoire:d0700000-d071ffff mémoire:d073f000-d073ffff portE/S:3080(taille=32)
  *-network NON-RÉCLAMÉ
       description: Network controller
       produit: BCM43228 802.11a/b/g/n
       fabricant: Broadcom Inc. and subsidiaries
       identifiant matériel: 0
       information bus: pci@0000:02:00.0
       version: 00
       bits: 64 bits
       horloge: 33MHz
       fonctionnalités: pm msi pciexpress bus_master cap_list
       configuration : latency=0
       ressources : mémoire:d0500000-d0503fff

>>    lsmod | sort 

aesni_intel           372736  4
af_alg                 28672  6 algif_hash,algif_skcipher
ahci                   40960  2
algif_hash             16384  1
algif_skcipher         16384  1
at24                   24576  0
autofs4                45056  2
bluetooth             577536  31 btrtl,btintel,btbcm,bnep,btusb,rfcomm
bnep                   24576  2
btbcm                  16384  1 btusb
btintel                28672  1 btusb
btrtl                  24576  1 btusb
btusb                  57344  0
cec                    53248  2 drm_kms_helper,i915
cmac                   16384  3
coretemp               20480  0
crc32_pclmul           16384  0
crct10dif_pclmul       16384  1
cryptd                 24576  3 crypto_simd,ghash_clmulni_intel
crypto_simd            16384  1 aesni_intel
drm                   552960  7 drm_kms_helper,i915
drm_kms_helper        217088  1 i915
e1000e                262144  0
ecc                    32768  1 ecdh_generic
ecdh_generic           16384  2 bluetooth
fb_sys_fops            16384  1 drm_kms_helper
ghash_clmulni_intel    16384  0
glue_helper            16384  1 aesni_intel
hp_accel               28672  0
hp_wireless            16384  0
hp_wmi                 16384  0
i2c_algo_bit           16384  1 i915
i2c_i801               32768  0
i2c_smbus              20480  1 i2c_i801
i915                 2195456  21
input_leds             16384  0
intel_cstate           20480  0
intel_powerclamp       20480  0
intel_rapl_common      28672  1 intel_rapl_msr
intel_rapl_msr         20480  0
ip_tables              32768  0
joydev                 24576  0
ledtrig_audio          16384  1 snd_hda_codec_generic
libahci                36864  1 ahci
lis3lv02d              24576  1 hp_accel
lp                     20480  0
lpc_ich                24576  0
mac_hid                16384  0
mc                     57344  4 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common
mei                   106496  3 mei_hdcp,mei_me
mei_hdcp               24576  0
mei_me                 40960  1
Module                  Size  Used by
nls_iso8859_1          16384  1
parport                65536  3 parport_pc,lp,ppdev
parport_pc             45056  1
ppdev                  24576  0
psmouse               155648  0
rapl                   20480  0
rc_core                57344  1 cec
rfcomm                 81920  4
rtsx_pci               81920  1 rtsx_pci_sdmmc
rtsx_pci_sdmmc         28672  0
sch_fq_codel           20480  2
serio_raw              20480  0
snd                    94208  19 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_timer,snd_pcm,snd_hda_codec_idt,snd_rawmidi
snd_hda_codec         139264  4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_idt
snd_hda_codec_generic    81920  1 snd_hda_codec_idt
snd_hda_codec_hdmi     61440  1
snd_hda_codec_idt      61440  1
snd_hda_core           94208  5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_idt
snd_hda_intel          53248  4
snd_hwdep              20480  1 snd_hda_codec
snd_intel_dspcfg       24576  1 snd_hda_intel
snd_pcm               114688  4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_core
snd_rawmidi            36864  1 snd_seq_midi
snd_seq                69632  2 snd_seq_midi,snd_seq_midi_event
snd_seq_device         16384  3 snd_seq,snd_seq_midi,snd_rawmidi
snd_seq_midi           20480  0
snd_seq_midi_event     16384  1 snd_seq_midi
snd_timer              40960  2 snd_seq,snd_pcm
soundcore              16384  1 snd
sparse_keymap          16384  1 hp_wmi
syscopyarea            16384  1 drm_kms_helper
sysfillrect            16384  1 drm_kms_helper
sysimgblt              16384  1 drm_kms_helper
tpm_infineon           20480  0
uvcvideo               98304  0
video                  49152  1 i915
videobuf2_common       53248  2 videobuf2_v4l2,uvcvideo
videobuf2_memops       20480  1 videobuf2_vmalloc
videobuf2_v4l2         24576  1 uvcvideo
videobuf2_vmalloc      20480  1 uvcvideo
videodev              237568  3 videobuf2_v4l2,uvcvideo,videobuf2_common
wmi                    32768  2 hp_wmi,wmi_bmof
wmi_bmof               16384  0
x86_pkg_temp_thermal    20480  0
xhci_pci               20480  0
xhci_pci_renesas       20480  1 xhci_pci
x_tables               45056  1 ip_tables

>>    iwconfig 


>>    ip a 

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    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: enp0s25: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether b0:5a:da:b1:8f:29 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.86/24 brd 192.168.1.255 scope global dynamic noprefixroute enp0s25
       valid_lft 85596sec preferred_lft 85596sec
    inet6 fe80::b130:923f:5fc9:4e52/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever

>>    sudo iwlist scan 


>>    uname -r -m 

5.8.0-38-generic x86_64

>>    cat /etc/network/interfaces 


>>    nm-tool 


>>    nmcli dev wifi 


>>    nmcli connection list (< 15.04) ou nmcli connection show (>= 15.04) 

NAME                 UUID                                  TYPE      DEVICE  
Connexion filaire 1  8e3d5ea4-06d6-3291-93a5-1ea2f2932993  ethernet  enp0s25 
SFR_2FF0             1590819c-3a32-49b3-a8b3-b441a726261e  wifi      --      

>>    sudo rfkill list 

0: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no