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Wifi ok win10 mais bug beaucoup UBU 18.04 realtek 8723b*

Michelklh

Bonjour,
Je suis tres utilisateur d'ubuntu: trés content et en général les petits pb j'y arrive avec les tutos. Merci à tous!!
J'essaie de depanner un collegue qui a un pc recent bas de gamme "Thomson à 250 € environ"
Sous Win10
le wifi marche trés bien et les caracteristiques sont:

realtek rtl8723B wireless lan 802.11n USB 2.0 network adaptateur
Sous ubuntu , le wifi marche un peu : signal faible, debit faible à tres faible
J'ai parcouru de nombreux tuto pout rtl8723** mais rien n'a marché??
Merci d'avance de votre aide
Ci dessous les données techniques
Michel

johan@johan-pc:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.1 LTS"
johan@johan-pc:~$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 058f:5608 Alcor Micro Corp. 
Bus 001 Device 004: ID 0bda:b720 Realtek Semiconductor Corp. 
Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 001 Device 002: ID 1ea7:0066  
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
johan@johan-pc:~$ lspci
00:00.0 Host bridge: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Host Bridge (rev 0b)
00:00.1 Signal processing controller: Intel Corporation Device 5a8c (rev 0b)
00:02.0 VGA compatible controller: Intel Corporation Device 5a85 (rev 0b)
00:0e.0 Audio device: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Audio Cluster (rev 0b)
00:0f.0 Communication controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Trusted Execution Engine (rev 0b)
00:12.0 SATA controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SATA AHCI Controller (rev 0b)
00:13.0 PCI bridge: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series PCI Express Port A #1 (rev fb)
00:15.0 USB controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series USB xHCI (rev 0b)
00:16.0 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #1 (rev 0b)
00:16.1 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #2 (rev 0b)
00:16.2 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #3 (rev 0b)
00:16.3 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #4 (rev 0b)
00:17.0 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #5 (rev 0b)
00:17.1 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #6 (rev 0b)
00:17.2 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #7 (rev 0b)
00:17.3 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #8 (rev 0b)
00:18.0 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller #1 (rev 0b)
00:18.1 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller #2 (rev 0b)
00:18.2 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller #3 (rev 0b)
00:18.3 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller #4 (rev 0b)
00:19.0 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller #1 (rev 0b)
00:19.1 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller #2 (rev 0b)
00:19.2 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller #3 (rev 0b)
00:1b.0 SD Host controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SDXC/MMC Host Controller (rev 0b)
00:1c.0 SD Host controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series eMMC Controller (rev 0b)
00:1e.0 SD Host controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SDIO Controller (rev 0b)
00:1f.0 ISA bridge: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Low Pin Count Interface (rev 0b)
00:1f.1 SMBus: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SMBus Controller (rev 0b)
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)
johan@johan-pc:~$ lspci -k -nn | grep -A 3 -i net
01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 07)
	Subsystem: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:0123]
	Kernel driver in use: r8169
	Kernel modules: r8169
johan@johan-pc:~$ lspci -k
00:00.0 Host bridge: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Host Bridge (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Host Bridge
00:00.1 Signal processing controller: Intel Corporation Device 5a8c (rev 0b)
	Kernel driver in use: proc_thermal
	Kernel modules: processor_thermal_device
00:02.0 VGA compatible controller: Intel Corporation Device 5a85 (rev 0b)
	Subsystem: Intel Corporation Device 2212
	Kernel driver in use: i915
	Kernel modules: i915
00:0e.0 Audio device: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Audio Cluster (rev 0b)
	Subsystem: Device 1c6c:122a
	Kernel driver in use: snd_hda_intel
	Kernel modules: snd_hda_intel, snd_soc_skl
00:0f.0 Communication controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Trusted Execution Engine (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Trusted Execution Engine
	Kernel driver in use: mei_me
	Kernel modules: mei_me
00:12.0 SATA controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SATA AHCI Controller (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SATA AHCI Controller
	Kernel driver in use: ahci
	Kernel modules: ahci
00:13.0 PCI bridge: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series PCI Express Port A #1 (rev fb)
	Kernel driver in use: pcieport
	Kernel modules: shpchp
00:15.0 USB controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series USB xHCI (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series USB xHCI
	Kernel driver in use: xhci_hcd
00:16.0 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #1 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:16.1 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #2 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:16.2 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #3 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:16.3 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #4 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:17.0 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #5 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:17.1 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #6 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:17.2 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #7 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:17.3 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller #8 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series I2C Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:18.0 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller #1 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:18.1 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller #2 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:18.2 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller #3 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:18.3 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller #4 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series HSUART Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:19.0 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller #1 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:19.1 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller #2 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:19.2 Signal processing controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller #3 (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SPI Controller
	Kernel driver in use: intel-lpss
	Kernel modules: intel_lpss_pci
00:1b.0 SD Host controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SDXC/MMC Host Controller (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SDXC/MMC Host Controller
	Kernel driver in use: sdhci-pci
	Kernel modules: sdhci_pci
00:1c.0 SD Host controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series eMMC Controller (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series eMMC Controller
	Kernel driver in use: sdhci-pci
	Kernel modules: sdhci_pci
00:1e.0 SD Host controller: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SDIO Controller (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SDIO Controller
	Kernel driver in use: sdhci-pci
	Kernel modules: sdhci_pci
00:1f.0 ISA bridge: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Low Pin Count Interface (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series Low Pin Count Interface
	Kernel driver in use: lpc_ich
	Kernel modules: lpc_ich
00:1f.1 SMBus: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SMBus Controller (rev 0b)
	Subsystem: Intel Corporation Celeron N3350/Pentium N4200/Atom E3900 Series SMBus Controller
	Kernel driver in use: i801_smbus
	Kernel modules: i2c_i801
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)
	Subsystem: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
	Kernel driver in use: r8169
	Kernel modules: r8169
johan@johan-pc:~$ sudo lshw -C network
[sudo] Mot de passe de johan : 
  *-network                 
       description: Ethernet interface
       produit: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       fabriquant: Realtek Semiconductor Co., Ltd.
       identifiant matériel: 0
       information bus: pci@0000:01:00.0
       nom logique: enp1s0
       version: 07
       numéro de série: 00:e0:c3:3e:c4:f6
       taille: 1Gbit/s
       capacité: 1Gbit/s
       bits: 64 bits
       horloge: 33MHz
       fonctionnalités: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168e-3_0.0.4 03/27/12 ip=192.168.1.21 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
       ressources: irq:22 portE/S:e000(taille=256) mémoire:82100000-82100fff mémoire:a0000000-a0003fff
  *-network
       description: Interface réseau sans fil
       identifiant matériel: 1
       information bus: usb@1:7
       nom logique: wlx0c9a420198a5
       numéro de série: 0c:9a:42:01:98:a5
       fonctionnalités: ethernet physical wireless
       configuration: broadcast=yes driver=rtl8xxxu driverversion=4.15.0-42-generic firmware=N/A link=no multicast=yes wireless=IEEE 802.11
johan@johan-pc:~$ lsmod
Module                  Size  Used by
rfcomm                 77824  4
cmac                   16384  1
bnep                   20480  2
nls_iso8859_1          16384  1
arc4                   16384  2
uvcvideo               86016  0
spi_pxa2xx_platform    24576  0
intel_rapl             20480  0
videobuf2_vmalloc      16384  1 uvcvideo
videobuf2_memops       16384  1 videobuf2_vmalloc
videobuf2_v4l2         24576  1 uvcvideo
videobuf2_core         40960  2 videobuf2_v4l2,uvcvideo
videodev              184320  3 videobuf2_core,videobuf2_v4l2,uvcvideo
media                  40960  2 videodev,uvcvideo
intel_telemetry_pltdrv    20480  0
intel_punit_ipc        16384  1 intel_telemetry_pltdrv
intel_telemetry_core    16384  1 intel_telemetry_pltdrv
intel_pmc_ipc          20480  1 intel_telemetry_pltdrv
8250_dw                16384  0
hid_multitouch         20480  0
x86_pkg_temp_thermal    16384  0
snd_soc_skl            90112  0
intel_powerclamp       16384  0
snd_soc_skl_ipc        65536  1 snd_soc_skl
snd_hda_ext_core       24576  1 snd_soc_skl
coretemp               16384  0
rtl8xxxu              122880  0
snd_soc_sst_dsp        32768  1 snd_soc_skl_ipc
snd_soc_sst_ipc        16384  1 snd_soc_skl_ipc
snd_soc_acpi           16384  1 snd_soc_skl
kvm_intel             212992  0
snd_soc_core          241664  1 snd_soc_skl
mac80211              778240  1 rtl8xxxu
kvm                   598016  1 kvm_intel
btusb                  45056  0
snd_compress           20480  1 snd_soc_core
ac97_bus               16384  1 snd_soc_core
irqbypass              16384  1 kvm
btrtl                  16384  1 btusb
cfg80211              622592  1 mac80211
btbcm                  16384  1 btusb
rtsx_usb_ms            20480  0
btintel                16384  1 btusb
memstick               16384  1 rtsx_usb_ms
bluetooth             548864  33 btrtl,btintel,btbcm,bnep,btusb,rfcomm
ecdh_generic           24576  2 bluetooth
snd_pcm_dmaengine      16384  1 snd_soc_core
crct10dif_pclmul       16384  0
crc32_pclmul           16384  0
ghash_clmulni_intel    16384  0
pcbc                   16384  0
snd_hda_codec_hdmi     49152  1
aesni_intel           188416  2
joydev                 24576  0
aes_x86_64             20480  1 aesni_intel
snd_hda_codec_realtek   106496  1
snd_hda_codec_generic    73728  1 snd_hda_codec_realtek
crypto_simd            16384  1 aesni_intel
snd_hda_intel          40960  3
snd_hda_codec         126976  4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek
snd_hda_core           81920  7 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_soc_skl
glue_helper            16384  1 aesni_intel
snd_hwdep              20480  1 snd_hda_codec
cryptd                 24576  3 crypto_simd,ghash_clmulni_intel,aesni_intel
intel_cstate           20480  0
snd_pcm                98304  8 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_soc_core,snd_soc_skl,snd_hda_core,snd_pcm_dmaengine
intel_rapl_perf        16384  0
input_leds             16384  0
serio_raw              16384  0
snd_seq_midi           16384  0
snd_seq_midi_event     16384  1 snd_seq_midi
mac_hid                16384  0
lpc_ich                24576  0
snd_rawmidi            32768  1 snd_seq_midi
snd_seq                65536  2 snd_seq_midi,snd_seq_midi_event
snd_seq_device         16384  3 snd_seq,snd_seq_midi,snd_rawmidi
snd_timer              32768  2 snd_seq,snd_pcm
snd                    81920  19 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_compress,snd_soc_core,snd_pcm,snd_rawmidi
soundcore              16384  1 snd
int3403_thermal        16384  0
idma64                 20480  6
virt_dma               16384  1 idma64
processor_thermal_device    16384  0
mei_me                 40960  0
mei                    90112  1 mei_me
intel_lpss_pci         20480  0
intel_lpss             16384  1 intel_lpss_pci
shpchp                 36864  0
intel_soc_dts_iosf     16384  1 processor_thermal_device
int340x_thermal_zone    16384  2 int3403_thermal,processor_thermal_device
int3400_thermal        16384  0
acpi_thermal_rel       16384  1 int3400_thermal
intel_hid              16384  0
sparse_keymap          16384  1 intel_hid
sch_fq_codel           20480  6
parport_pc             36864  0
ppdev                  20480  0
lp                     20480  0
parport                49152  3 parport_pc,lp,ppdev
ip_tables              28672  0
x_tables               40960  1 ip_tables
autofs4                40960  2
hid_generic            16384  0
rtsx_usb_sdmmc         28672  0
rtsx_usb               20480  2 rtsx_usb_sdmmc,rtsx_usb_ms
usbhid                 49152  0
i915                 1617920  11
i2c_algo_bit           16384  1 i915
drm_kms_helper        172032  1 i915
syscopyarea            16384  1 drm_kms_helper
sysfillrect            16384  1 drm_kms_helper
sysimgblt              16384  1 drm_kms_helper
fb_sys_fops            16384  1 drm_kms_helper
drm                   401408  5 drm_kms_helper,i915
i2c_hid                20480  0
r8169                  86016  0
hid                   118784  4 i2c_hid,usbhid,hid_multitouch,hid_generic
sdhci_pci              32768  0
sdhci                  49152  1 sdhci_pci
i2c_i801               28672  0
mii                    16384  1 r8169
ahci                   36864  4
libahci                32768  1 ahci
video                  45056  1 i915
pinctrl_broxton        40960  3
johan@johan-pc:~$ iwconfig
wlx0c9a420198a5  IEEE 802.11  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr=2347 B   Fragment thr:off
          Power Management:off
          
lo        no wireless extensions.

enp1s0    no wireless extensions.

johan@johan-pc:~$ ifconfig -a

La commande « ifconfig » n'a pas été trouvée, mais peut être installée avec :

sudo apt install net-tools

johan@johan-pc:~$ ifconfig -a
enp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.21  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 2a01:cb00:862c:100:c4d2:dae0:6f4d:edee  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::c842:50b:ff7f:5b40  prefixlen 64  scopeid 0x20<link>
        inet6 2a01:cb00:862c:100:343c:9b2c:4e40:72d6  prefixlen 64  scopeid 0x0<global>
        ether 00:e0:c3:3e:c4:f6  txqueuelen 1000  (Ethernet)
        RX packets 4797  bytes 4604270 (4.6 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3708  bytes 432982 (432.9 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Boucle locale)
        RX packets 447  bytes 36500 (36.5 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 447  bytes 36500 (36.5 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlx0c9a420198a5: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 0c:9a:42:01:98:a5  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

johan@johan-pc:~$ sudo iwlist scan
wlx0c9a420198a5  Interface doesn't support scanning : Device or resource busy

lo        Interface doesn't support scanning.

enp1s0    Interface doesn't support scanning.

johan@johan-pc:~$ uname -r -m
4.15.0-42-generic x86_64
johan@johan-pc:~$ cat  /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
johan@johan-pc:~$ nm-tool

La commande « nm-tool » n'a pas été trouvée, voulez-vous dire :

  commande « dm-tool » du deb lightdm

Essayez : sudo apt install <nom du deb>

johan@johan-pc:~$ sudo rfkill list
0: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no
1: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
johan@johan-pc:~$ nmcli connection show
NAME                 UUID                                  TYPE      DEVICE 
Connexion filaire 1  9bc8ba3f-f58d-3c0b-ac0d-b771387e58c4  ethernet  enp1s0 
Livebox-78A0         15667f2c-be5f-4504-abf7-037077cb19c6  wifi      --     
johan@johan-pc:~$

xubu1957

Bonjour,

Vu :

ID 0bda:b720 Realtek Semiconductor Corp.

Il faut utiliser les instructions données dans > github.com/lwfinger/rtl8723bu

_ _ _

Voir aussi > [SOLVED] Realtek Wifi is Not Working on Xubuntu 18.04 LTS with RTL8723BU

Michelklh

git clone https://github.com/lwfinger/rtl8723bu.git
cd rtl8723bu

Puis j'ai fait make mais ça plante et ensuite je ne suis pas du niveau ?

johan@johan-pc:~/rtl8723bu/rtl8723bu-master$ make
make ARCH=x86_64 CROSS_COMPILE= -C /lib/modules/4.15.0-42-generic/build M=/home/johan/rtl8723bu/rtl8723bu-master  modules
make[1] : on entre dans le répertoire « /usr/src/linux-headers-4.15.0-42-generic »
arch/x86/Makefile:156: CONFIG_X86_X32 enabled but no binutils support
./scripts/gcc-version.sh: ligne 26: gcc : commande introuvable
./scripts/gcc-version.sh: ligne 27: gcc : commande introuvable
make[1]: gcc: Command not found
Makefile:975: "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel"
  CC [M]  /home/johan/rtl8723bu/rtl8723bu-master/core/rtw_cmd.o
/bin/sh: 1: gcc: not found
scripts/Makefile.build:332: recipe for target '/home/johan/rtl8723bu/rtl8723bu-master/core/rtw_cmd.o' failed
make[2]: *** [/home/johan/rtl8723bu/rtl8723bu-master/core/rtw_cmd.o] Error 127
Makefile:1551: recipe for target '_module_/home/johan/rtl8723bu/rtl8723bu-master' failed
make[1]: *** [_module_/home/johan/rtl8723bu/rtl8723bu-master] Error 2
make[1] : on quitte le répertoire « /usr/src/linux-headers-4.15.0-42-generic »
Makefile:322: recipe for target 'modules' failed
make: *** [modules] Error 2

xubu1957

Je ne sais pas compiler, il faut attendre ce soir pour du renfort.

Je vais demander.

Nuliel

Hello,

sudo apt install build-essential
cd rtl8723bu
make
sudo make install

Michelklh

j'ai fait avec succes
sudo apt install build-essential
cd rtl8723bu make sudo make install
la preuve

johan@johan-pc:~/rtl8723bu$ sudo make install
install -p -m 644 -D 8723bu.ko /lib/modules/4.15.0-42-generic/kernel/drivers/net/wireless/8723bu.ko
/sbin/depmod  -a 4.15.0-42-generic
install rtl8723b_fw.bin -D /lib/firmware/rtl_bt/rtl8723b_fw.bin

mais ç a ne marche encore moins bien

J'avais essayé le protocole dkms , ça ne marche pas non plus.

Juste un évenement à noter: au cours d'une des tres nombreuses reinstallation de Ubu 18.04 , une fois j'ai eu le wifi tres bon durant une installation en passant par en mode try puis l'install c'est faite trés bien avec mise à jour avec le menu qui propose d'utiliser le pilote realtek .
Quand j ai rebooté : perdu le bon wifi >retour du pb
Je n ai jamis pu reproduire le cas ??

xubu1957

Que répond :

sudo modprobe rtl8723bu

Michelklh

johan@johan-pc:~$ sudo modprobe rtl8723bu
modprobe: FATAL: Module rtl8723bu not found in directory /lib/modules/4.15.0-42-generic

xubu1957

Montre :

modinfo rtl8723bu

lsmod | grep rtl

dmesg | grep rtl

Michelklh

voilà

johan@johan-pc:~$ modinfo rtl8723bu
modinfo: ERROR: Module rtl8723bu not found.
johan@johan-pc:~$ lsmod | grep rtl
rtl8xxxu              122880  0
mac80211              778240  1 rtl8xxxu
btrtl                  16384  1 btusb
bluetooth             548864  33 btrtl,btintel,btbcm,bnep,btusb,rfcomm
johan@johan-pc:~$ dmesg | grep rtl
[   19.134126] Bluetooth: hci0: rtl: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
[   19.134131] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_config.bin
[   19.141861] bluetooth hci0: Direct firmware load for rtl_bt/rtl8723b_config.bin failed with error -2
[   19.141876] Bluetooth: hci0: rtl: loading rtl_bt/rtl8723b_fw.bin
[   19.332573] usb 1-7: rtl8723bu_parse_efuse: dumping efuse (0x200 bytes):
[   19.332694] usb 1-7: rtl8xxxu: Loading firmware rtlwifi/rtl8723bu_nic.bin
[   20.203563] usbcore: registered new interface driver rtl8xxxu
[   22.358579] RTL871X: rtl8723bu v4.3.6.11_12942.20141204_BTCOEX20140507-4E40
[   22.358580] RTL871X: rtl8723bu BT-Coex version = BTCOEX20140507-4E40
[   22.358652] usbcore: registered new interface driver rtl8723bu
[   22.362115] rtl8xxxu 1-7:1.2 wlx0c9a420198a5: renamed from wlan0

xubu1957

Tente :

sudo modprobe -r rtl8xxxu
sudo modprobe -a rtl8723bu

Michelklh

johan@johan-pc:~$ sudo modprobe -r rtl8xxxu
johan@johan-pc:~$ sudo modprobe -a rtl8723bu
modprobe: WARNING: Module rtl8723bu not found in directory /lib/modules/4.15.0-42-generic

Pas de dossier rtl8732bu dans
/lib/modules/4.15.0-42-generic/kernel/drivers/net/wireless/realtek/rtlwifi/

NicoApi73

Bonsoir,

sudo modprobe 8723bu

Michelklh

j ai fait
un tout petit peu de wifi
0,2 Mb/s téléchargement /0,1 Mb/s transfert /Latence : 15 ms
c'est comme à l installation
le module 8723bu manque dans le dossier

johan@johan-pc:/lib/modules/4.15.0-42-generic/kernel/drivers/net/wireless/realtek/rtlwifi$ ls
btcoexist  rtl8192ce  rtl8192ee  rtl8723be   rtl_pci.ko
rtl8188ee  rtl8192cu  rtl8192se  rtl8723com  rtl_usb.ko
rtl8192c   rtl8192de  rtl8723ae  rtl8821ae   rtlwifi.ko

Nuliel

Tu peux redémarrer?

Michelklh

je l avais fait et j'ai redemarré à nouveau

pareil

Nuliel

Edit: C'est bon je l'ai. Ca marchait avant de compiler le module?

Michelklh

j ai fait des essais avec les differents drivers rtl8723**, rtl8192ce, rtl8821ae

A chaque redmarrage j ai fait sudo modprobe -r rtl8******* puis modprobe -r rtl8xxxu, puis modprobe rtl8atester

Actuellement je marche avec rtl8723ae apres sudo modprobe rtl8723 et reboot

j'ai une connexion wifi signal faible 2barres/6 et environ 1.5 megabits descendant
c mieux qu'avant mais c'est 5% de la bande passante normale chez moi

voici lsmod

johan@johan-pc:~$ lsmod
Module                  Size  Used by
rfcomm                 77824  4
ccm                    20480  6
cmac                   16384  1
bnep                   20480  2
nls_iso8859_1          16384  1
8723bu                897024  0
arc4                   16384  2
spi_pxa2xx_platform    24576  0
8250_dw                16384  0
hid_multitouch         20480  0
intel_rapl             20480  0
intel_telemetry_pltdrv    20480  0
intel_punit_ipc        16384  1 intel_telemetry_pltdrv
intel_telemetry_core    16384  1 intel_telemetry_pltdrv
intel_pmc_ipc          20480  1 intel_telemetry_pltdrv
x86_pkg_temp_thermal    16384  0
intel_powerclamp       16384  0
coretemp               16384  0
kvm_intel             212992  0
snd_hda_codec_hdmi     49152  1
kvm                   598016  1 kvm_intel
snd_hda_codec_realtek   106496  1
snd_hda_codec_generic    73728  1 snd_hda_codec_realtek
irqbypass              16384  1 kvm
crct10dif_pclmul       16384  0
crc32_pclmul           16384  0
ghash_clmulni_intel    16384  0
pcbc                   16384  0
aesni_intel           188416  6
aes_x86_64             20480  1 aesni_intel
crypto_simd            16384  1 aesni_intel
glue_helper            16384  1 aesni_intel
cryptd                 24576  3 crypto_simd,ghash_clmulni_intel,aesni_intel
intel_cstate           20480  0
intel_rapl_perf        16384  0
serio_raw              16384  0
snd_soc_skl            90112  0
snd_soc_skl_ipc        65536  1 snd_soc_skl
lpc_ich                24576  0
snd_hda_ext_core       24576  1 snd_soc_skl
rtl8xxxu              122880  0
snd_soc_sst_dsp        32768  1 snd_soc_skl_ipc
snd_soc_sst_ipc        16384  1 snd_soc_skl_ipc
mac80211              778240  1 rtl8xxxu
snd_soc_acpi           16384  1 snd_soc_skl
uvcvideo               86016  0
snd_soc_core          241664  1 snd_soc_skl
videobuf2_vmalloc      16384  1 uvcvideo
snd_compress           20480  1 snd_soc_core
ac97_bus               16384  1 snd_soc_core
snd_pcm_dmaengine      16384  1 snd_soc_core
videobuf2_memops       16384  1 videobuf2_vmalloc
videobuf2_v4l2         24576  1 uvcvideo
videobuf2_core         40960  2 videobuf2_v4l2,uvcvideo
videodev              184320  3 videobuf2_core,videobuf2_v4l2,uvcvideo
cfg80211              622592  2 mac80211,8723bu
media                  40960  2 videodev,uvcvideo
rtsx_usb_ms            20480  0
memstick               16384  1 rtsx_usb_ms
btusb                  45056  0
btrtl                  16384  1 btusb
btbcm                  16384  1 btusb
joydev                 24576  0
btintel                16384  1 btusb
input_leds             16384  0
bluetooth             548864  33 btrtl,btintel,btbcm,bnep,btusb,rfcomm
snd_hda_intel          40960  3
ecdh_generic           24576  2 bluetooth
snd_hda_codec         126976  4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek
snd_hda_core           81920  7 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_soc_skl
snd_hwdep              20480  1 snd_hda_codec
snd_pcm                98304  8 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_soc_core,snd_soc_skl,snd_hda_core,snd_pcm_dmaengine
snd_seq_midi           16384  0
snd_seq_midi_event     16384  1 snd_seq_midi
snd_rawmidi            32768  1 snd_seq_midi
snd_seq                65536  2 snd_seq_midi,snd_seq_midi_event
idma64                 20480  6
virt_dma               16384  1 idma64
intel_lpss_pci         20480  0
snd_seq_device         16384  3 snd_seq,snd_seq_midi,snd_rawmidi
intel_lpss             16384  1 intel_lpss_pci
snd_timer              32768  2 snd_seq,snd_pcm
snd                    81920  19 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_compress,snd_soc_core,snd_pcm,snd_rawmidi
mei_me                 40960  0
processor_thermal_device    16384  0
shpchp                 36864  0
mei                    90112  1 mei_me
intel_soc_dts_iosf     16384  1 processor_thermal_device
soundcore              16384  1 snd
mac_hid                16384  0
int3403_thermal        16384  0
int3400_thermal        16384  0
int340x_thermal_zone    16384  2 int3403_thermal,processor_thermal_device
acpi_thermal_rel       16384  1 int3400_thermal
intel_hid              16384  0
sparse_keymap          16384  1 intel_hid
sch_fq_codel           20480  6
parport_pc             36864  0
ppdev                  20480  0
lp                     20480  0
parport                49152  3 parport_pc,lp,ppdev
ip_tables              28672  0
x_tables               40960  1 ip_tables
autofs4                40960  2
hid_generic            16384  0
rtsx_usb_sdmmc         28672  0
rtsx_usb               20480  2 rtsx_usb_sdmmc,rtsx_usb_ms
usbhid                 49152  0
i915                 1617920  11
i2c_algo_bit           16384  1 i915
drm_kms_helper        172032  1 i915
syscopyarea            16384  1 drm_kms_helper
i2c_i801               28672  0
sdhci_pci              32768  0
sdhci                  49152  1 sdhci_pci
sysfillrect            16384  1 drm_kms_helper
r8169                  86016  0
sysimgblt              16384  1 drm_kms_helper
fb_sys_fops            16384  1 drm_kms_helper
mii                    16384  1 r8169
ahci                   36864  4
drm                   401408  5 drm_kms_helper,i915
libahci                32768  1 ahci
i2c_hid                20480  0
hid                   118784  4 i2c_hid,usbhid,hid_multitouch,hid_generic
video                  45056  1 i915
pinctrl_broxton        40960  3
johan@johan-pc:~$

Michelklh

Le module rtl8723bu a bien été compilé mais n'est pas la liste des modules
/lib/modules/4.15.0-42-generic/kernel/drivers/net/wireless/realtek/rtlwifi$
Lorsque j ai fait make, make install , sudo modprobe rtl8723bu et reboot : rien de positif à signaler

NicoApi73

@xubu : est tu certain que c'est un 8723bu?

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