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#1 Le 08/10/2017, à 19:03

cetoines

Wifi faible

Bonjour,
ma connexion wifi est faible, j'ai du mal à capter lorsque je m'eloigne un peu de la box. A cote de la box, le signal n'est que de 3/4.
Merci pour votre aide.

>>    cat /etc/lsb-release 

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.3 LTS"

>>    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 005: ID 8087:07dc Intel Corp. 
Bus 002 Device 004: ID 0bda:572a Realtek Semiconductor Corp. 
Bus 002 Device 003: ID 062a:4101 Creative Labs Wireless Keyboard/Mouse
Bus 002 Device 002: ID 04f3:007e Elan Microelectronics Corp. 
Bus 002 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]: Intel Corporation Wireless 7260 [8086:08b2] (rev 73)
	Subsystem: Intel Corporation Wireless-N 7260 [8086:4262]
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi

>>    sudo lshw -C network 

  *-network
       description: Interface réseau sans fil
       produit: Wireless 7260
       fabriquant: Intel Corporation
       identifiant matériel: 0
       information bus: pci@0000:02:00.0
       nom logique: wlp2s0
       version: 73
       numéro de série: 80:19:34:39:93:1f
       bits: 64 bits
       horloge: 33MHz
       fonctionnalités: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=4.4.0-66-generic firmware=17.459231.0 ip=192.168.1.20 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
       ressources: irq:49 mémoire:b2400000-b2401fff

>>    lsmod 

Module                  Size  Used by
rfcomm                 69632  2
drbg                   32768  1
ansi_cprng             16384  0
ctr                    16384  1
ccm                    20480  1
pci_stub               16384  1
vboxpci                24576  0
vboxnetadp             28672  0
vboxnetflt             28672  0
vboxdrv               454656  3 vboxnetadp,vboxnetflt,vboxpci
bnep                   20480  2
arc4                   16384  2
uvcvideo               90112  0
videobuf2_vmalloc      16384  1 uvcvideo
videobuf2_memops       16384  1 videobuf2_vmalloc
videobuf2_v4l2         28672  1 uvcvideo
videobuf2_core         36864  2 uvcvideo,videobuf2_v4l2
v4l2_common            16384  1 videobuf2_v4l2
videodev              176128  4 uvcvideo,v4l2_common,videobuf2_core,videobuf2_v4l2
intel_rapl             20480  0
x86_pkg_temp_thermal    16384  0
intel_powerclamp       16384  0
coretemp               16384  0
kvm_intel             172032  0
media                  24576  2 uvcvideo,videodev
hid_multitouch         20480  0
kvm                   544768  1 kvm_intel
btusb                  45056  0
btrtl                  16384  1 btusb
btbcm                  16384  1 btusb
btintel                16384  1 btusb
irqbypass              16384  1 kvm
bluetooth             520192  29 bnep,btbcm,btrtl,btusb,rfcomm,btintel
crct10dif_pclmul       16384  0
crc32_pclmul           16384  0
iwlmvm                311296  0
ghash_clmulni_intel    16384  0
aesni_intel           167936  2
mac80211              737280  1 iwlmvm
aes_x86_64             20480  1 aesni_intel
lrw                    16384  1 aesni_intel
gf128mul               16384  1 lrw
glue_helper            16384  1 aesni_intel
ablk_helper            16384  1 aesni_intel
cryptd                 20480  3 ghash_clmulni_intel,aesni_intel,ablk_helper
iwlwifi               200704  1 iwlmvm
cfg80211              565248  3 iwlwifi,mac80211,iwlmvm
joydev                 20480  0
input_leds             16384  0
snd_hda_codec_hdmi     53248  1
serio_raw              16384  0
snd_hda_codec_realtek    86016  1
snd_hda_codec_generic    77824  1 snd_hda_codec_realtek
snd_hda_intel          40960  5
snd_hda_codec         135168  4 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel
snd_hda_core           73728  5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
snd_hwdep              16384  1 snd_hda_codec
snd_pcm               106496  4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_core
snd_seq_midi           16384  0
snd_seq_midi_event     16384  1 snd_seq_midi
snd_rawmidi            32768  1 snd_seq_midi
snd_seq                69632  2 snd_seq_midi_event,snd_seq_midi
snd_seq_device         16384  3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer              32768  2 snd_pcm,snd_seq
soc_button_array       16384  0
snd                    81920  21 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
mei_me                 36864  0
mei                    98304  1 mei_me
shpchp                 36864  0
soundcore              16384  1 snd
intel_smartconnect     16384  0
mac_hid                16384  0
lpc_ich                24576  0
parport_pc             32768  0
ppdev                  20480  0
lp                     20480  0
parport                49152  3 lp,ppdev,parport_pc
autofs4                40960  2
hid_generic            16384  0
usbhid                 49152  0
hid                   118784  3 hid_multitouch,hid_generic,usbhid
i915                 1208320  7
i2c_algo_bit           16384  1 i915
drm_kms_helper        155648  1 i915
psmouse               131072  0
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
ahci                   36864  2
drm                   364544  8 i915,drm_kms_helper
libahci                32768  1 ahci
wmi                    20480  0
video                  40960  1 i915
fjes                   28672  0
>>    iwconfig 

wlp2s0    IEEE 802.11bgn  ESSID:"Livebox-A4F2"  
          Mode:Managed  Frequency:2.462 GHz  Access Point: 48:83:C7:CB:A4:F2   
          Bit Rate=144.4 Mb/s   Tx-Power=22 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=64/70  Signal level=-46 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:2132   Missed beacon:0


>>    ifconfig -a 

lo        Link encap:Boucle locale  
          inet adr:127.0.0.1  Masque:255.0.0.0
          adr inet6: ::1/128 Scope:Hôte
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          Packets reçus:869 erreurs:0 :0 overruns:0 frame:0
          TX packets:869 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1 
          Octets reçus:78774 (78.7 KB) Octets transmis:78774 (78.7 KB)

wlp2s0    Link encap:Ethernet  HWaddr 80:19:34:39:93:1f  
          inet adr:192.168.1.20  Bcast:192.168.1.255  Masque:255.255.255.0
          adr inet6: fe80::d6d3:6008:2ae3:1037/64 Scope:Lien
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Packets reçus:108958 erreurs:0 :0 overruns:0 frame:0
          TX packets:73668 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          Octets reçus:153753782 (153.7 MB) Octets transmis:9320713 (9.3 MB)


>>    sudo iwlist scan 

wlp2s0    Scan completed :
          Cell 01 - Address: 48:83:C7:CB:A4:F2
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=64/70  Signal level=-46 dBm  
                    Encryption key:on
                    ESSID:"Livebox-A4F2"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000023876ddc571
                    Extra: Last beacon: 72ms ago
                    IE: Unknown: 000C4C697665626F782D41344632
                    IE: Unknown: 010882848B960C121824
                    IE: Unknown: 03010B
                    IE: Unknown: 0706465220010D14
                    IE: Unknown: 2A0100
                    IE: Unknown: 32043048606C
                    IE: Unknown: 2D1AAD011BFFFF0000000000000000000000000000000406E4A70C00
                    IE: Unknown: 331AAD011BFFFF0000000000000000000000000000000406E4A70C00
                    IE: Unknown: 3D160B001700000000000000000000000000000000000000
                    IE: Unknown: 34160B001700000000000000000000000000000000000000
                    IE: Unknown: DD180050F2020101890003A4000027A4000042435E0062322F00
                    IE: Unknown: DD0900037F01010000FF7F
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD8F0050F204104A0001101044000102103B000103104700103B3F3F3A4A3EFA49F83B4D393B3F3F3A10210008536167656D636F6D10230016536167656D636F6D46617374333936355F4C42322E381024000C53475F4C42335F312E322E34104200094E51313630363746461054000800060050F204000110110000100800020006103C0001011049000600372A000120
          Cell 02 - Address: 48:83:C7:15:67:90
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=34/70  Signal level=-76 dBm  
                    Encryption key:on
                    ESSID:"Bbox-686176C2"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=000000c87ef7d7f7
                    Extra: Last beacon: 544ms ago
                    IE: Unknown: 000D42626F782D3638363137364332
                    IE: Unknown: 010882848B962430486C
                    IE: Unknown: 030101
                    IE: Unknown: 2A0104
                    IE: Unknown: 2F0104
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 32040C121860
                    IE: Unknown: 2D1AFC181BFFFF000000000000000000000000000000000000000000
                    IE: Unknown: 3D1601080400000000000000000000000000000000000000
                    IE: Unknown: DD800050F204104A0001101044000102103B0001031047001054C0192956EA580463F849C45DA1E9CA1021000842726F6164636F6D1023000842726F6164636F6D1024000631323334353610420004313233341054000800060050F20400011011000A42726F6164636F6D415010080002200C103C0001011049000600372A000120
                    IE: Unknown: DD090010180202F02C0000
                    IE: WPA Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
          Cell 03 - Address: 44:CE:7D:20:45:D4
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=28/70  Signal level=-82 dBm  
                    Encryption key:on
                    ESSID:"SFR_45D0"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=000000ced53967b1
                    Extra: Last beacon: 532ms ago
                    IE: Unknown: 00085346525F34354430
                    IE: Unknown: 010882848B962430486C
                    IE: Unknown: 030101
                    IE: Unknown: 2A0104
                    IE: Unknown: 2F0104
                    IE: Unknown: 32040C121860
                    IE: Unknown: 2D1AEC181BFFFF000000000000000000000000000000000000000000
                    IE: Unknown: 3D1601000400000000000000000000000000000000000000
                    IE: Unknown: DD090010180202F02C0000
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
          Cell 04 - Address: 30:7C:B2:18:DA:95
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=42/70  Signal level=-68 dBm  
                    Encryption key:on
                    ESSID:"Livebox-DA95"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000002917741d75
                    Extra: Last beacon: 396ms ago
                    IE: Unknown: 000C4C697665626F782D44413935
                    IE: Unknown: 010882848B960C121824
                    IE: Unknown: 030106
                    IE: Unknown: 0706465220010D14
                    IE: Unknown: 2A0100
                    IE: Unknown: 32043048606C
                    IE: Unknown: 2D1AAD011BFFFF0000000000000000000000000000000406E4A70C00
                    IE: Unknown: 331AAD011BFFFF0000000000000000000000000000000406E4A70C00
                    IE: Unknown: 3D1606080000000000000000000000000000000000000000
                    IE: Unknown: 341606080000000000000000000000000000000000000000
                    IE: Unknown: DD180050F2020101850003A4000027A4000042435E0062322F00
                    IE: Unknown: DD0900037F01010000FF7F
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD8F0050F204104A0001101044000102103B000103104700103A373E4A4939F83FFB48403C3A373E4A10210008536167656D636F6D10230016536167656D636F6D46617374333936355F4C42322E381024000C53475F4C42335F312E322E3110420009414E313632363746461054000800060050F204000110110000100800020006103C0001011049000600372A000120
          Cell 05 - Address: 12:7C:B2:18:DA:95
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=41/70  Signal level=-69 dBm  
                    Encryption key:off
                    ESSID:"orange"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=3200002917742d16
                    Extra: Last beacon: 392ms ago
                    IE: Unknown: 00066F72616E6765
                    IE: Unknown: 010882848B960C121824
                    IE: Unknown: 030106
                    IE: Unknown: 0706465220010D14
                    IE: Unknown: 2A0100
                    IE: Unknown: 32043048606C
                    IE: Unknown: 2D1AAD011BFFFF0000000000000000000000000000000406E4A70C00
                    IE: Unknown: 331AAD011BFFFF0000000000000000000000000000000406E4A70C00
                    IE: Unknown: 3D1606080000000000000000000000000000000000000000
                    IE: Unknown: 341606080000000000000000000000000000000000000000
                    IE: Unknown: DD180050F2020101850003A4000027A4000042435E0062322F00
                    IE: Unknown: DD0900037F01010000FF7F
          Cell 06 - Address: 00:24:D4:53:4E:FC
                    Channel:13
                    Frequency:2.472 GHz (Channel 13)
                    Quality=32/70  Signal level=-78 dBm  
                    Encryption key:on
                    ESSID:"freebox_LXGZFT"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
                              6 Mb/s; 9 Mb/s; 12 Mb/s
                    Bit Rates:18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000095a20d51eff
                    Extra: Last beacon: 36ms ago
                    IE: Unknown: 000E66726565626F785F4C58475A4654
                    IE: Unknown: 010882848B962C0C1218
                    IE: Unknown: 03010D
                    IE: Unknown: 2A0104
                    IE: Unknown: 3205243048606C
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 2D1AEE0003FFFFFF0001000000000000000100000000000000000000
                    IE: Unknown: 3D160D070600000000000000000000000000000000000000
                    IE: Unknown: 7F080000000000000040
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
          Cell 07 - Address: 00:24:D4:53:4E:FD
                    Channel:13
                    Frequency:2.472 GHz (Channel 13)
                    Quality=34/70  Signal level=-76 dBm  
                    Encryption key:off
                    ESSID:"FreeWifi"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
                              6 Mb/s; 9 Mb/s; 12 Mb/s
                    Bit Rates:18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000095a20d4a765
                    Extra: Last beacon: 36ms ago
                    IE: Unknown: 00084672656557696669
                    IE: Unknown: 010882848B962C0C1218
                    IE: Unknown: 03010D
                    IE: Unknown: 2A0104
                    IE: Unknown: 3205243048606C
                    IE: Unknown: 2D1AEE0003FFFFFF0001000000000000000100000000000000000000
                    IE: Unknown: 3D160D070600000000000000000000000000000000000000
                    IE: Unknown: 7F080000000000000040
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
          Cell 08 - Address: 00:24:D4:53:4E:FE
                    Channel:13
                    Frequency:2.472 GHz (Channel 13)
                    Quality=35/70  Signal level=-75 dBm  
                    Encryption key:on
                    ESSID:"FreeWifi_secure"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 22 Mb/s
                              6 Mb/s; 9 Mb/s; 12 Mb/s
                    Bit Rates:18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000095a20d42f0a
                    Extra: Last beacon: 32ms ago
                    IE: Unknown: 000F46726565576966695F736563757265
                    IE: Unknown: 010882848B962C0C1218
                    IE: Unknown: 03010D
                    IE: Unknown: 2A0104
                    IE: Unknown: 3205243048606C
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : 802.1x
                    IE: Unknown: 2D1AEE0003FFFFFF0001000000000000000100000000000000000000
                    IE: Unknown: 3D160D070600000000000000000000000000000000000000
                    IE: Unknown: 7F080000000000000040
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00


>>    uname -r -m 

4.4.0-66-generic x86_64

>>    cat /etc/network/interfaces 

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

>>    nm-tool 


>>    nmcli dev wifi 

*  SSID             MODE   CHAN  DÉBIT    SIGNAL  BARS  SÉCURITÉ    
*  Livebox-A4F2     Infra  11    54 Mo/s  90      ▂▄▆█  WPA1 WPA2   
   Livebox-DA95     Infra  6     54 Mo/s  54      ▂▄__  WPA1 WPA2   
   orange           Infra  6     54 Mo/s  52      ▂▄__  --          
   Bbox-78A05FCF    Infra  1     54 Mo/s  47      ▂▄__  WPA1 WPA2   
   FreeWifi_secure  Infra  13    54 Mo/s  42      ▂▄__  WPA2 802.1X 
   Bbox-686176C2    Infra  1     54 Mo/s  40      ▂▄__  WPA1 WPA2   
   FreeWifi         Infra  13    54 Mo/s  40      ▂▄__  --          
   freebox_LXGZFT   Infra  13    54 Mo/s  37      ▂▄__  WPA1        
   SFR_45D0         Infra  1     54 Mo/s  30      ▂___  WPA1        

>>    nmcli connection show 

NOM                            UUID                                  TYPE             PÉRIPHÉRIQUE 
Livebox-A4F2                   47ddaaf7-490c-4a02-b175-c155597249f7  802-11-wireless  wlp2s0       
Antoine                        92653631-4b16-4646-b979-f3bf21a81de8  802-11-wireless  --           
Bose SoundTouch Wi-Fi Network  f1bdd451-1137-4d97-a134-7d120473c0ee  802-11-wireless  --           
FREEBOX_BARBARA_I1             6ea732f6-6454-40d4-a332-a8b73065a793  802-11-wireless  --           
NEUF_00F0                      e0029632-ebee-40cf-85a5-edb9291e9389  802-11-wireless  --           
SFR_25A8                       e8a4a681-8beb-4907-be61-6631bdff4f6e  802-11-wireless  --           
SFR_4A10                       8a5b4328-cfca-4ac7-959c-9456ac5b73ff  802-11-wireless  --           
SFR_7FB0                       c9824c98-06e0-410f-9706-8d69d6eec4e7  802-11-wireless  --           
vvfvlege-clientele             5fd3e5bd-814b-4e72-87e0-b550aaed7228  802-11-wireless  --           
vvfvlege-clientele-130         e1e41048-67e3-4882-9f11-13b847582795  802-11-wireless  --           
vvfvlege-clientele-148         300d29b8-a2bc-444f-b06c-92f64ebe9af5  802-11-wireless  --           
vvfvlege-clientele-Animation   3c0d9943-98eb-4da2-b07a-85853adefc0c  802-11-wireless  --           

>>    sudo rfkill list 

0: hci0: Bluetooth
	Soft blocked: yes
	Hard blocked: no
1: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no

UBUNTU 16.04 LTS
Intel NUC NUC5i3RYH - Barebone (vive le silence!). Core i3-5010U de 5ème génération (Broadwell)
SSD 500 Go (vive la rapidité...et le silence !)
2*4Go DDR3 1600 MHz

Hors ligne

#2 Le 08/10/2017, à 19:16

xubu1957

Re : Wifi faible

Bonjour,

Comme dans ton précédent fil du 14/05/2017 > wifi faible...

*  SSID             MODE   CHAN  DÉBIT    SIGNAL  BARS  SÉCURITÉ    
*  Livebox-A4F2     Infra  11    54 Mo/s  90      ▂▄▆█  WPA1 WPA2  

Passer la Box en seul chiffrement WPA2, voir le § 1 [Tuto] Pas de Wi-fi ? Eléments importants à vérifier

Pour la carte wifi :

Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b2] (rev 73)

cette commande :

echo "options iwlwifi bt_coex_active=N swcrypto=1 11n_disable=1" | sudo tee /etc/modprobe.d/iwlwifi.conf

enfin le noyau, non mis à jour :

4.4.0-66-generic x86_64

effectuer les mises à jour :

sudo apt update
sudo apt full-upgrade

Après avoir effectué toutes ces opérations, et redémarré box et ordi, à nouveau, tu donneras :

uname -r

et :

nmcli dev wifi

ainsi que :

iwconfig 

Il y a une anomalie :

 Tx excessive retries:0  Invalid misc:2132   Missed beacon:0

Invalid misc:2132

Recherche documentaire du 25/05/2017 >  wifi-too-much-invalid-misc-how-to-fix-it

Wifi  "Invalid misc", comment le réparer?
Voici quelques résultats:

root@debian:/home/love# iwconfig wlan0
wlan0     IEEE 802.11bgn  ESSID:"SITI_Broadband-06E6-G"  
      ...
          Tx excessive retries:0  Invalid misc:202   Missed beacon:0

J'ai remarqué que la valeur augmente avec le temps et que mon wifi reste connecté, mais Internet arrête de fonctionner.
     
Cela ressemble à un problème typique d'interférence wifi. Essayez de localiser l'appareil causant le problème et, lorsque vous le faites, supprimez cette question car elle serait hors sujet. Il suffit simplement de désactiver la plupart des équipements électroniques et de faire attention à ce qui change lorsque les problèmes commencent, peut généralement résoudre 90% de ceux-ci.

Rajout  - recherche documentaire 08/10/2017  >

1 ) réponse reprise dans [ubuntu] High invalid misc on ath9k - is it a problem?

2 ) What-is-wireless-interference-and-how-do-I-troubleshoot-it

En règle générale, trois facteurs peuvent expliquer les interférences sur le réseau Wi-Fi : des murs et des sols qui bloquent les signaux sans fil, d'autres réseaux Wi-Fi qui utilisent le même canal que le vôtre, ou des appareils électroniques et électroménagers qui émettent des interférences radioélectriques. Il se peut que le réseau Wi-Fi de votre domicile ne soient affectés que par un ou deux de ces facteurs, mais la plupart des réseaux sans fil peuvent être affectés par les trois.

Dernière modification par xubu1957 (Le 08/10/2017, à 21:38)


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#3 Le 11/10/2017, à 10:46

Edmond Dantès

Re : Wifi faible

Salut.

Peut-tu placer ton PC là où tu captes mal et faire :

sudo iwlist scan 

Les caissières de supermarchés sont exposées aux antennes antivol, donc les ondes radio provoquent des tendinites.
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