Bonjour,
Je vois que mon problème est partagé depuis la survenue du noyau 5.8 !
Déjà, je peux te dire, @JP Scortani, comment j'ai réussi à installer le noyau 5.4. J'ai trouvé cette page :
https://packages.ubuntu.com/focal/amd64/linux-generic/download et
où j'ai téléchargé le noyau 5. à partit de "security.ubuntu.com/ubuntu" . Ensuite j'ai redémarré mon PC en appuyant sur la touche Majuscule et là, le GRUB apparaît et j'ai sélectionné le noyau voulue. Mais, apparemment, cela ne suffit pas et je crois qu'il faut supprimer le noyau 5.8 mais -comme je ne suis pas sûre de moi- j'attends qu'une personne ma conseille...
Depuis l'arrivée de ce fameux noyau, je suis "scotchée" près de ma box !!!
Je vais suivre le conseil de
@xubu1957 et j'envoie le résultat du wificheck :
[code]
>> lsb_release -a
Distributor ID: Ubuntu
Description: Ubuntu 20.04.1 LTS
Release: 20.04
Codename: focal
>> lsusb
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 005: ID 0c45:6449 Microdia
Bus 001 Device 004: ID 413c:8197 Dell Computer Corp.
Bus 001 Device 003: ID 046d:c52f Logitech, Inc. Unifying Receiver
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
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 002: ID 1058:1010 Western Digital Technologies, Inc. Elements Portable (WDBAAR)
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
>> lspci -k -nn | grep -A 3 -i net
02:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)
Subsystem: Dell BCM4313 802.11bgn Wireless Network Adapter [1028:0015]
Kernel modules: bcma
0b:00.0 SD Host controller [0805]: O2 Micro, Inc. OZ600FJ0/OZ900FJ0/OZ600FJS SD/MMC Card Reader Controller [1217:8221] (rev 05)
Subsystem: Dell OZ600FJ0/OZ900FJ0/OZ600FJS SD/MMC Card Reader Controller [1028:053d]
--
0c:00.0 Ethernet controller [0200]: Broadcom Inc. and subsidiaries NetXtreme BCM5761 Gigabit Ethernet PCIe [14e4:1681] (rev 10)
Subsystem: Dell NetXtreme BCM5761 Gigabit Ethernet PCIe [1028:053d]
Kernel driver in use: tg3
Kernel modules: tg3
>> sudo lshw -C network
*-network NON-RÉCLAMÉ
description: Network controller
produit: BCM4313 802.11bgn Wireless Network Adapter
fabricant: Broadcom Inc. and subsidiaries
identifiant matériel: 0
information bus: pci@0000:02:00.0
version: 01
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm msi pciexpress bus_master cap_list
configuration : latency=0
ressources : mémoire:f7e00000-f7e03fff
*-network
description: Ethernet interface
produit: NetXtreme BCM5761 Gigabit Ethernet PCIe
fabricant: Broadcom Inc. and subsidiaries
identifiant matériel: 0
information bus: pci@0000:0c:00.0
nom logique: enp12s0
version: 10
numéro de série: f0:1f:af:2a:b8:3a
taille: 1Gbit/s
capacité: 1Gbit/s
bits: 64 bits
horloge: 33MHz
fonctionnalités: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration : autonegotiation=on broadcast=yes driver=tg3 driverversion=5.8.0-38-generic duplex=full firmware=5761-v3.80 ip=192.168.0.49 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
ressources : irq:35 mémoire:f7c10000-f7c1ffff mémoire:f7c00000-f7c0ffff
>> lsmod | sort
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
cqhci 28672 1 sdhci_pci
crc32_pclmul 16384 0
crct10dif_pclmul 16384 1
cryptd 24576 1 ghash_clmulni_intel
dcdbas 20480 1 dell_smbios
dell_laptop 24576 0
dell_rbtn 20480 1
dell_smbios 28672 2 dell_wmi,dell_laptop
dell_smm_hwmon 20480 0
dell_smo8800 20480 0
dell_wmi 20480 0
dell_wmi_descriptor 20480 2 dell_wmi,dell_smbios
drm 552960 7 drm_kms_helper,i915
drm_kms_helper 217088 1 i915
ecc 32768 1 ecdh_generic
ecdh_generic 16384 2 bluetooth
fb_sys_fops 16384 1 drm_kms_helper
ghash_clmulni_intel 16384 0
hid 135168 4 usbhid,hid_generic,hid_logitech_dj,hid_logitech_hidpp
hid_generic 16384 0
hid_logitech_dj 28672 0
hid_logitech_hidpp 45056 0
i2c_algo_bit 16384 1 i915
i2c_i801 32768 0
i2c_smbus 20480 1 i2c_i801
i915 2195456 16
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
kvm 712704 1 kvm_intel
kvm_intel 286720 0
ledtrig_audio 16384 2 snd_hda_codec_generic,dell_laptop
libahci 36864 1 ahci
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 0
ppdev 24576 0
psmouse 155648 0
rapl 20480 0
rc_core 57344 1 cec
rfcomm 81920 4
sch_fq_codel 20480 2
sdhci 69632 1 sdhci_pci
sdhci_pci 53248 0
serio_raw 20480 0
snd 94208 17 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 3
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 dell_wmi
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
tg3 172032 0
uas 28672 0
usbhid 57344 1 hid_logitech_dj
usb_storage 73728 2 uas
uvcvideo 98304 0
video 49152 3 dell_wmi,dell_laptop,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 4 dell_wmi,wmi_bmof,dell_smbios,dell_wmi_descriptor
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: enp12s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether f0:1f:af:2a:b8:3a brd ff:ff:ff:ff:ff:ff
inet 192.168.0.49/24 brd 192.168.0.255 scope global dynamic noprefixroute enp12s0
valid_lft 42792sec preferred_lft 42792sec
inet6 2a01:e0a:11d:2860:f979:610:20b7:5538/64 scope global temporary dynamic
valid_lft 86381sec preferred_lft 85878sec
inet6 2a01:e0a:11d:2860:9585:324c:ed14:d134/64 scope global dynamic mngtmpaddr noprefixroute
valid_lft 86381sec preferred_lft 86381sec
inet6 fe80::20e4:bdd2:a47d:ab96/64 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 3f8dc7f7-1e7d-301a-af64-0fee8e72fc67 ethernet enp12s0
4B8662-TS3300series 5c0a633c-6ca5-4fc7-8143-d7f2846b9636 wifi --
FREEBOX_ANNENEIGE_6T 1 364be830-9cd9-4d82-81f3-204ca044bf51 wifi --
>> sudo rfkill list
1: dell-wifi: Wireless LAN
Soft blocked: no
Hard blocked: no
2: dell-bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
3: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
[/code]
Peut-être quavec ces infos , qu'elqu'un pourra m'aider...