Slt j'ai un problème : le signal de mon wifi est très faible malgré le fait que je suis à peine à 3m du routeur.Je signal aussi que j'avais pas ce problème sous Windows 8.Voici le retour du wificheck:
>> cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.2 LTS"
>> lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 05c8:036e Cheng Uei Precision Industry Co., Ltd (Foxlink) Webcam
Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub
Bus 001 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]: Qualcomm Atheros AR9485 Wireless Network Adapter [168c:0032] (rev 01)
Subsystem: Hewlett-Packard Company AR9485/HB125 802.11bgn 1×1 Wi-Fi Adapter [103c:1838]
Kernel driver in use: ath9k
Kernel modules: ath9k
--
04:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL810xE PCI Express Fast Ethernet controller [10ec:8136] (rev 07)
Subsystem: Hewlett-Packard Company RTL810xE PCI Express Fast Ethernet controller [103c:2213]
Kernel driver in use: r8169
Kernel modules: r8169
>> sudo lshw -C network
*-network
description: Wireless interface
product: AR9485 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 01
serial: 30:10:b3:6e:4b:83
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=4.15.0-46-generic firmware=N/A ip=192.168.1.119 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:17 memory:90700000-9077ffff memory:90780000-9078ffff
*-network
description: Ethernet interface
product: RTL810xE PCI Express Fast Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:04:00.0
logical name: enp4s0
version: 07
serial: ec:b1:d7:d8:a2:bf
size: 10Mbit/s
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:19 ioport:1000(size=256) memory:90500000-90500fff memory:90400000-90403fff
>> lsmod | sort
ahci 40960 2
arc4 16384 2
ath 28672 3 ath9k_common,ath9k,ath9k_hw
ath9k 151552 0
ath9k_common 36864 1 ath9k
ath9k_hw 471040 2 ath9k_common,ath9k
autofs4 40960 2
binfmt_misc 20480 1
bluetooth 548864 11 btqca,btintel,hci_uart,btbcm,bnep
bnep 20480 2
btbcm 16384 1 hci_uart
btintel 16384 1 hci_uart
btqca 16384 1 hci_uart
ccm 20480 3
cfg80211 622592 4 ath9k_common,ath9k,ath,mac80211
coretemp 16384 0
crc32_pclmul 16384 0
crct10dif_pclmul 16384 0
cryptd 24576 1 ghash_clmulni_intel
drm 401408 16 drm_kms_helper,i915
drm_kms_helper 172032 1 i915
dw_dmac 16384 0
dw_dmac_core 24576 1 dw_dmac
ecdh_generic 24576 1 bluetooth
fb_sys_fops 16384 1 drm_kms_helper
ghash_clmulni_intel 16384 0
hci_uart 106496 0
hid 118784 1 i2c_hid
hp_wireless 16384 0
hp_wmi 16384 0
i2c_algo_bit 16384 1 i915
i2c_hid 20480 0
i915 1617920 29
input_leds 16384 0
intel_cstate 20480 0
intel_powerclamp 16384 0
intel_rapl 20480 0
intel_soc_dts_iosf 16384 1 intel_soc_dts_thermal
intel_soc_dts_thermal 16384 0
ip6table_filter 16384 1
ip6_tables 28672 1 ip6table_filter
ip6t_REJECT 16384 1
ip6t_rt 16384 3
iptable_filter 16384 1
ip_tables 28672 1 iptable_filter
ipt_REJECT 16384 1
irqbypass 16384 1 kvm
joydev 24576 0
kvm 598016 1 kvm_intel
kvm_intel 212992 0
libahci 32768 1 ahci
libcrc32c 16384 2 nf_conntrack,nf_nat
lp 20480 0
lpc_ich 24576 0
mac80211 778240 1 ath9k
mac_hid 16384 0
media 40960 2 videodev,uvcvideo
mei 90112 1 mei_txe
mei_txe 20480 0
memstick 16384 1 rtsx_pci_ms
mii 16384 1 r8169
mmc_block 36864 0
Module Size Used by
msr 16384 0
nf_conntrack 131072 8 xt_conntrack,nf_conntrack_ipv6,nf_conntrack_ipv4,nf_nat,nf_nat_ftp,nf_conntrack_netbios_ns,nf_conntrack_broadcast,nf_conntrack_ftp
nf_conntrack_broadcast 16384 1 nf_conntrack_netbios_ns
nf_conntrack_ftp 20480 1 nf_nat_ftp
nf_conntrack_ipv4 16384 8
nf_conntrack_ipv6 20480 8
nf_conntrack_netbios_ns 16384 0
nf_defrag_ipv4 16384 1 nf_conntrack_ipv4
nf_defrag_ipv6 36864 1 nf_conntrack_ipv6
nf_log_common 16384 2 nf_log_ipv4,nf_log_ipv6
nf_log_ipv4 16384 10
nf_log_ipv6 16384 10
nf_nat 32768 1 nf_nat_ftp
nf_nat_ftp 16384 0
nf_reject_ipv4 16384 1 ipt_REJECT
nf_reject_ipv6 16384 1 ip6t_REJECT
nls_iso8859_1 16384 1
parport 49152 3 parport_pc,lp,ppdev
parport_pc 36864 0
pci_stub 16384 1
ppdev 20480 0
psmouse 147456 0
punit_atom_debug 16384 0
pwm_lpss 16384 1 pwm_lpss_platform
pwm_lpss_platform 16384 0
r8169 86016 0
rfkill_gpio 16384 0
rtsx_pci 65536 2 rtsx_pci_sdmmc,rtsx_pci_ms
rtsx_pci_ms 20480 0
rtsx_pci_sdmmc 24576 0
serio_raw 16384 0
shpchp 36864 0
snd 81920 23 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_pcm,snd_rawmidi
snd_hda_codec 126976 4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek
snd_hda_codec_generic 73728 1 snd_hda_codec_realtek
snd_hda_codec_hdmi 49152 1
snd_hda_codec_realtek 106496 1
snd_hda_core 81920 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek
snd_hda_intel 40960 6
snd_hwdep 20480 1 snd_hda_codec
snd_pcm 98304 4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_core
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_seq_midi 16384 0
snd_seq_midi_event 16384 1 snd_seq_midi
snd_timer 32768 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
uvcvideo 86016 0
vboxdrv 487424 3 vboxpci,vboxnetadp,vboxnetflt
vboxnetadp 28672 0
vboxnetflt 28672 0
vboxpci 24576 0
video 45056 1 i915
videobuf2_core 40960 2 videobuf2_v4l2,uvcvideo
videobuf2_memops 16384 1 videobuf2_vmalloc
videobuf2_v4l2 24576 1 uvcvideo
videobuf2_vmalloc 16384 1 uvcvideo
videodev 184320 3 videobuf2_core,videobuf2_v4l2,uvcvideo
wmi 24576 2 hp_wmi,wmi_bmof
wmi_bmof 16384 0
x_tables 40960 13 ip6table_filter,xt_conntrack,iptable_filter,xt_LOG,xt_tcpudp,xt_addrtype,ip6t_rt,ip6_tables,ipt_REJECT,ip_tables,xt_limit,xt_hl,ip6t_REJECT
xt_addrtype 16384 4
xt_conntrack 16384 16
xt_hl 16384 22
xt_limit 16384 3
xt_LOG 16384 20
xt_tcpudp 16384 18
>> iwconfig
wlp2s0 IEEE 802.11 ESSID:"BUREAU PCR"
Mode:Managed Frequency:2.457 GHz Access Point: 18:A6:F7:4B:02:C8
Bit Rate=1 Mb/s Tx-Power=15 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=20/70 Signal level=-90 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:5 Invalid misc:8 Missed beacon:0
>> ifconfig -a
enp4s0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether ec:b1:d7:d8:a2:bf 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
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 (Local Loopback)
RX packets 5626 bytes 455288 (455.2 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 5626 bytes 455288 (455.2 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.119 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::6455:7d33:845a:11bc prefixlen 64 scopeid 0x20<link>
ether 30:10:b3:6e:4b:83 txqueuelen 1000 (Ethernet)
RX packets 19906 bytes 12141905 (12.1 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 20585 bytes 3096363 (3.0 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
>> sudo iwlist scan
wlp2s0 Scan completed :
Cell 01 - Address: 18:A6:F7:4B:02:C8
Channel:10
Frequency:2.457 GHz (Channel 10)
Quality=18/70 Signal level=-92 dBm
Encryption key:on
ESSID:"BUREAU PCR"
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=000000032a5df55e
Extra: Last beacon: 216ms ago
IE: Unknown: 000A42555245415520504352
IE: Unknown: 010882848B960C121824
IE: Unknown: 03010A
IE: Unknown: 2A0100
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: Unknown: 32043048606C
IE: Unknown: 2D1AEF111BFFFF000000000000000000000100000000000000000000
IE: Unknown: 3D160A0F0600000000000000000000000000000000000000
IE: Unknown: 7F080000000000000040
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
IE: Unknown: DD0900037F01010000FF7F
IE: Unknown: DDA10050F204104A0001101044000102103B00010310470010000102030405060708090A0B0C0D0E0F1021000754502D4C494E4B1023000A544C2D57413830314E4410240003332E3010420003312E301054000800060050F204000110110020576972656C6573732041636365737320506F696E7420544C2D57413830314E44100800020086103C000101104900140024E26002000101600000020001600100020001
Cell 02 - Address: F4:F2:6D:90:D5:B8
Channel:10
Frequency:2.457 GHz (Channel 10)
Quality=16/70 Signal level=-94 dBm
Encryption key:on
ESSID:"SECRETARIAT PCR"
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=000000032baa7933
Extra: Last beacon: 88ms ago
IE: Unknown: 000F534543524554415249415420504352
IE: Unknown: 010882848B962430486C
IE: Unknown: 03010A
IE: Unknown: 2A0100
IE: Unknown: 2F0100
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: 32040C121860
IE: Unknown: 0B050100190000
IE: Unknown: 2D1AFE1817FFFF000001000000000000000000000000000000000000
IE: Unknown: 3D160A0F1200000000000000000000000000000000000000
IE: Unknown: 7F03000008
IE: Unknown: DD800050F204104A0001101044000102103B000103104700102962A035E96021C310CEF669EBA74A031021000842726F6164636F6D1023000842726F6164636F6D1024000631323334353610420004313233341054000800060050F20400011011000A42726F6164636F6D415010080002200C103C0001011049000600372A000120
IE: Unknown: DD090010180201040C0000
IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
Cell 03 - Address: 18:A6:F7:71:EC:E2
Channel:3
Frequency:2.422 GHz (Channel 3)
Quality=21/70 Signal level=-89 dBm
Encryption key:on
ESSID:"TP-LINK_AP_ECE2"
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=000000032cc195b2
Extra: Last beacon: 88ms ago
IE: Unknown: 000F54502D4C494E4B5F41505F45434532
IE: Unknown: 010882848B960C121824
IE: Unknown: 030103
IE: Unknown: 2A0100
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: 32043048606C
IE: Unknown: 2D1AEE111BFFFFFF0000000000000000000100000000000000000000
IE: Unknown: 3D16030D0000000000000000000000000000000000000000
IE: Unknown: 7F080000000000000040
IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
IE: Unknown: DD0900037F01010000FF7F
IE: Unknown: DD9E0050F204104A00011010440001021057000101103B000103104700100000000000001000000018A6F771ECE21021000754502D4C494E4B1023000A544C2D57413930314E4410240003342E3010420003312E301054000800060050F204000110110018576972656C657373204E20415020544C2D57413930314E44100800020086103C000101104900140024E26002000101600000020001600100020001
>> uname -r -m
4.15.0-46-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
IN-USE SSID MODE CHAN RATE SIGNAL BARS SECURITY
TP-LINK_AP_ECE2 Infra 3 405 Mbit/s 22 ▂___ WPA2
SECRETARIAT PCR Infra 10 270 Mbit/s 14 ▂___ WPA2
* BUREAU PCR Infra 10 270 Mbit/s 14 ▂___ WPA1 WPA2
>> nmcli connection list (< 15.04) ou nmcli connection show (>= 15.04)
NAME UUID TYPE DEVICE
BUREAU PCR bde47a5e-3c27-4c77-8aab-ed2ca4ecf130 wifi wlp2s0
SECRETARIAT PCR c7410b93-faab-4151-ac53-7656b35c46a3 wifi --
TP-LINK_AP_ECE2 9e9a46da-9f11-433d-bede-710d74b74622 wifi --
Wired connection 1 a626a1f6-e639-31c3-b392-3b5c8b0272ff ethernet --
>> nmcli connection status
>> sudo rfkill list
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
