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#1 Le 22/10/2008, à 14:39
- GillouG
Signal Wifi anormalement faible
Bonjour à tous,
Je suis débutant, ai passé mon ordi portable ACER Aspire 3023 WLMi sous Ubuntu 8.04, arrive à me connecter mais constate que le signal Wifi est très faible.
Mis juste à côté d'un autre ordi portable (Dell Vostro 1500 sous Vista), grosse différence de signal. Quand le Dell sous Vista m'indique une force de signal de 5/5, mon Acer sous Ubuntu m'indique un signal de 50%. Sachant que pour info, je suis à 8 m de ma Freebox.
Merci pour votre aide !
Gilles
cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=8.04
DISTRIB_CODENAME=hardy
DISTRIB_DESCRIPTION="Ubuntu 8.04.1"lsusb
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000lspci
00:00.0 Host bridge: ATI Technologies Inc RS480 Host Bridge (rev 01)
00:02.0 PCI bridge: ATI Technologies Inc RS480 PCI-X Root Port
00:06.0 PCI bridge: ATI Technologies Inc RS480 PCI Bridge
00:07.0 PCI bridge: ATI Technologies Inc RS480 PCI Bridge
00:13.0 USB Controller: ATI Technologies Inc IXP SB400 USB Host Controller
00:13.1 USB Controller: ATI Technologies Inc IXP SB400 USB Host Controller
00:13.2 USB Controller: ATI Technologies Inc IXP SB400 USB2 Host Controller
00:14.0 SMBus: ATI Technologies Inc IXP SB400 SMBus Controller (rev 11)
00:14.1 IDE interface: ATI Technologies Inc IXP SB400 IDE Controller
00:14.3 ISA bridge: ATI Technologies Inc IXP SB400 PCI-ISA Bridge
00:14.4 PCI bridge: ATI Technologies Inc IXP SB400 PCI-PCI Bridge
00:14.5 Multimedia audio controller: ATI Technologies Inc IXP SB400 AC'97 Audio Controller (rev 02)
00:14.6 Modem: ATI Technologies Inc SB400 AC'97 Modem Controller (rev 02)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility X700 (PCIE)
06:05.0 Network controller: Broadcom Corporation BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller (rev 02)
06:06.0 CardBus bridge: Texas Instruments PCIxx21/x515 Cardbus Controller
06:06.2 FireWire (IEEE 1394): Texas Instruments OHCI Compliant IEEE 1394 Host Controller
06:06.3 Mass storage controller: Texas Instruments PCIxx21 Integrated FlashMedia Controller
06:06.4 SD Host controller: Texas Instruments PCI6411/6421/6611/6621/7411/7421/7611/7621 Secure Digital Controller
06:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet (rev 10)Dernière modification par GillouG (Le 22/10/2008, à 15:28)
Hors ligne
#2 Le 22/10/2008, à 14:45
- GillouG
Re : Signal Wifi anormalement faible
J'ajouterai que le signal est tellement faible qu'un coup sur 2, je suis déconnecté.
La suite sinon à mon 1er poste :
sudo lshw -C network
*-network:0
description: Network controller
product: BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller
vendor: Broadcom Corporation
physical id: 5
bus info: pci@0000:06:05.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: bus_master
configuration: driver=b43-pci-bridge latency=64 module=ssb
*-network:1
description: Ethernet interface
product: RTL-8169 Gigabit Ethernet
vendor: Realtek Semiconductor Co., Ltd.
physical id: 7
bus info: pci@0000:06:07.0
logical name: eth0
version: 10
serial: 00:0a:e4:e0:b2:bf
size: 100MB/s
capacity: 1GB/s
width: 32 bits
clock: 66MHz
capabilities: pm bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.2LK duplex=half latency=64 link=no maxlatency=64 mingnt=32 module=r8169 multicast=yes port=twisted pair speed=100MB/s
*-network
description: Wireless interface
physical id: 1
logical name: wlan0
serial: 00:0e:9b:be:2e:2a
capabilities: ethernet physical wireless
configuration: broadcast=yes ip=192.168.0.11 multicast=yes wireless=IEEE 802.11glsmod
Module Size Used by
af_packet 23812 4
ipv6 267780 8
rfcomm 41744 2
l2cap 25728 13 rfcomm
bluetooth 61156 4 rfcomm,l2cap
rfkill_input 5760 0
ppdev 10372 0
powernow_k8 16704 0
cpufreq_conservative 8712 0
cpufreq_powersave 2688 0
cpufreq_userspace 5284 0
cpufreq_stats 7104 0
cpufreq_ondemand 9740 1
freq_table 5536 3 powernow_k8,cpufreq_stats,cpufreq_ondemand
sbs 15112 0
sbshc 7680 1 sbs
container 5632 0
dock 11280 0
iptable_filter 3840 0
ip_tables 14820 1 iptable_filter
x_tables 16132 1 ip_tables
sbp2 24072 0
parport_pc 36260 0
lp 12324 0
parport 37832 3 ppdev,parport_pc,lp
joydev 13120 0
pcmcia 40876 0
arc4 2944 2
ecb 4480 2
blkcipher 8324 1 ecb
b43 144548 0
ac 6916 0
battery 14212 0
rfkill 8596 3 rfkill_input,b43
irda 203068 0
mac80211 165652 1 b43
crc_ccitt 3072 1 irda
cfg80211 15112 1 mac80211
acer_acpi 18112 0
led_class 6020 2 b43,acer_acpi
evdev 13056 8
input_polldev 5896 1 b43
fglrx 1555468 23
video 19856 0
output 4736 1 video
snd_atiixp 21388 3
snd_atiixp_modem 17544 5
snd_ac97_codec 101028 2 snd_atiixp,snd_atiixp_modem
snd_pcm_oss 42144 0
snd_mixer_oss 17920 1 snd_pcm_oss
ac97_bus 3072 1 snd_ac97_codec
snd_pcm 78596 6 snd_atiixp,snd_atiixp_modem,snd_ac97_codec,snd_pcm_oss
snd_seq_dummy 4868 0
snd_seq_oss 35584 0
serio_raw 7940 0
sdhci 19076 0
snd_seq_midi 9376 0
tifm_7xx1 8576 0
snd_rawmidi 25760 1 snd_seq_midi
snd_seq_midi_event 8320 2 snd_seq_oss,snd_seq_midi
psmouse 40336 0
mmc_core 51460 1 sdhci
tifm_core 11012 1 tifm_7xx1
snd_seq 54224 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer 24836 2 snd_pcm,snd_seq
snd_seq_device 9612 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
yenta_socket 27276 1
rsrc_nonstatic 13696 1 yenta_socket
pcmcia_core 40596 3 pcmcia,yenta_socket,rsrc_nonstatic
wmi_acer 9644 1 acer_acpi
button 9232 0
i2c_piix4 9612 0
pcspkr 4224 0
snd 56996 26 snd_atiixp,snd_atiixp_modem,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_dummy,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore 8800 1 snd
k8temp 6656 0
ati_agp 9996 0
i2c_core 24832 1 i2c_piix4
shpchp 34452 0
pci_hotplug 30880 1 shpchp
snd_page_alloc 11400 3 snd_atiixp,snd_atiixp_modem,snd_pcm
agpgart 34760 2 fglrx,ati_agp
ext3 136840 1
jbd 48404 1 ext3
mbcache 9600 1 ext3
sg 36880 0
sr_mod 17956 0
cdrom 37408 1 sr_mod
sd_mod 30720 3
atiixp 5648 0 [permanent]
ide_core 113996 1 atiixp
pata_acpi 8320 0
pata_atiixp 8960 2
ohci1394 33584 0
r8169 33156 0
ata_generic 8324 0
ieee1394 93752 2 sbp2,ohci1394
ssb 34308 1 b43
libata 159344 3 pata_acpi,pata_atiixp,ata_generic
scsi_mod 151436 5 sbp2,sg,sr_mod,sd_mod,libata
ehci_hcd 37900 0
ohci_hcd 26640 0
usbcore 146412 3 ehci_hcd,ohci_hcd
thermal 16796 0
processor 37384 3 powernow_k8,thermal
fan 5636 0
fbcon 42912 0
tileblit 3456 1 fbcon
font 9472 1 fbcon
bitblit 6784 1 fbcon
softcursor 3072 1 bitblit
fuse 50708 3iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
wmaster0 no wireless extensions.
wlan0 IEEE 802.11g ESSID:"Phoceas_Network"
Mode:Managed Frequency:2.412 GHz Access Point: AA:39:27:73:E5:E4
Bit Rate=54 Mb/s Tx-Power=27 dBm
Retry min limit:7 RTS thr:off Fragment thr=2346 B
Link Quality=53/100 Signal level=-61 dBm Noise level=-73 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0ifconfig
eth0 Link encap:Ethernet HWaddr 00:0a:e4:e0:b2:bf
UP BROADCAST MULTICAST MTU:1500 Metric:1
Packets reçus:0 erreurs:0 :0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:0 (0.0 B) Octets transmis:0 (0.0 B)
Interruption:19 Adresse de base:0x6400
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:16436 Metric:1
Packets reçus:1999 erreurs:0 :0 overruns:0 frame:0
TX packets:1999 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:0
Octets reçus:100423 (98.0 KB) Octets transmis:100423 (98.0 KB)
wlan0 Link encap:Ethernet HWaddr 00:0e:9b:be:2e:2a
inet adr:192.168.0.11 Bcast:192.168.0.255 Masque:255.255.255.0
adr inet6: fe80::20e:9bff:febe:2e2a/64 Scope:Lien
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Packets reçus:1922 erreurs:0 :0 overruns:0 frame:0
TX packets:2170 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:1025625 (1001.5 KB) Octets transmis:551693 (538.7 KB)
wmaster0 Link encap:UNSPEC HWaddr 00-0E-9B-BE-2E-2A-00-00-00-00-00-00-00-00-00-00
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Packets reçus:0 erreurs:0 :0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
Octets reçus:0 (0.0 B) Octets transmis:0 (0.0 B)sudo iwlist scan
lo Interface doesn't support scanning.
eth0 Interface doesn't support scanning.
wmaster0 Interface doesn't support scanning.
wlan0 Scan completed :
Cell 01 - Address: AA:39:27:73:E5:E5
ESSID:""
Mode:Master
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=56/100 Signal level=-56 dBm Noise level=-72 dBm
Encryption key:on
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
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; 24 Mb/s; 36 Mb/s
48 Mb/s; 54 Mb/s
Extra:tsf=000000018309df43
Cell 02 - Address: AA:39:27:73:E5:E6
ESSID:""
Mode:Master
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=56/100 Signal level=-56 dBm Noise level=-72 dBm
Encryption key:on
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
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; 24 Mb/s; 36 Mb/s
48 Mb/s; 54 Mb/s
Extra:tsf=00000001830b746d
Cell 03 - Address: 00:1A:6B:06:3E:64
ESSID:"Livebox-98f2"
Mode:Master
Channel:10
Frequency:2.457 GHz (Channel 10)
Quality=45/100 Signal level=-69 dBm Noise level=-72 dBm
Encryption key:on
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; 6 Mb/s; 9 Mb/s
12 Mb/s; 48 Mb/s
Extra:tsf=0000003ea5169364
Cell 04 - Address: 00:1A:6B:1C:60:4B
ESSID:"Livebox-5c58"
Mode:Master
Channel:10
Frequency:2.457 GHz (Channel 10)
Quality=46/100 Signal level=-67 dBm Noise level=-72 dBm
Encryption key:on
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; 6 Mb/s; 9 Mb/s
12 Mb/s; 48 Mb/s
Extra:tsf=000000242ec9dd34
Cell 05 - Address: C6:21:F9:F2:1B:5B
ESSID:"freephonie"
Mode:Master
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=28/100 Signal level=-86 dBm Noise level=-72 dBm
Encryption key:on
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (1) : TKIP
Authentication Suites (1) : 802.1x
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; 24 Mb/s; 36 Mb/s
48 Mb/s; 54 Mb/s
Extra:tsf=00000020a94a1873
Cell 06 - Address: 00:17:33:A1:4C:64
ESSID:"Neuf WiFi"
Mode:Master
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=31/100 Signal level=-83 dBm Noise level=-72 dBm
Encryption key:off
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; 6 Mb/s; 9 Mb/s
12 Mb/s; 48 Mb/s
Extra:tsf=0000003ea7b1399b
Cell 07 - Address: 00:17:33:A1:4C:5D
ESSID:"NEUF_4C5C"
Mode:Master
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=28/100 Signal level=-86 dBm Noise level=-72 dBm
Encryption key:on
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
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; 6 Mb/s; 9 Mb/s
12 Mb/s; 48 Mb/s
Extra:tsf=0000003ea7b12a70
Cell 08 - Address: 6E:F4:E7:DE:1C:A4
ESSID:"cris_canal"
Mode:Master
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=26/100 Signal level=-88 dBm Noise level=-72 dBm
Encryption key:on
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : TKIP CCMP
Authentication Suites (1) : PSK
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; 24 Mb/s; 36 Mb/s
48 Mb/s; 54 Mb/s
Extra:tsf=00000029cf649b8a
Cell 09 - Address: 6E:F4:E7:DE:1C:A6
ESSID:""
Mode:Master
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=30/100 Signal level=-85 dBm Noise level=-72 dBm
Encryption key:on
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
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; 24 Mb/s; 36 Mb/s
48 Mb/s; 54 Mb/s
Extra:tsf=00000029cf64a7b8uname -r -m
2.6.24-21-generic i686cat /etc/network/interfaces
auto lo
iface lo inet loopbacknm-tool
NetworkManager Tool
State: connected
- Device: eth0 ----------------------------------------------------------------
NM Path: /org/freedesktop/NetworkManager/Devices/eth0
Type: Wired
Driver: r8169
Active: no
HW Address: 00:0A:E4:E0:B2:BF
Capabilities:
Supported: yes
Carrier Detect: yes
Speed: 100 Mb/s
Wired Settings
Hardware Link: no
- Device: wlan0 ----------------------------------------------------------------
NM Path: /org/freedesktop/NetworkManager/Devices/wlan0
Type: 802.11 Wireless
Driver: b43
Active: yes
HW Address: 00:0E:9B:BE:2E:2A
Capabilities:
Supported: yes
Speed: 54 Mb/s
Wireless Settings
Scanning: yes
WEP Encryption: yes
WPA Encryption: yes
WPA2 Encryption: yes
Wireless Networks (* = Current Network)
*Phoceas_Network:Infrastructure Mode, Freq 2.412 MHz, Rate 62 Mb/s, Strength 55%, Encrypted (WPA)
freephonie: Infrastructure Mode, Freq 2.412 MHz, Rate 62 Mb/s, Strength 52%, Encrypted (WPA Enterprise)
Livebox-98f2: Infrastructure Mode, Freq 2.457 MHz, Rate 62 Mb/s, Strength 45%, Encrypted (WEP)
Livebox-5c58: Infrastructure Mode, Freq 2.457 MHz, Rate 62 Mb/s, Strength 48%, Encrypted (WEP)
freeboxHD: Infrastructure Mode, Freq 2.412 MHz, Rate 62 Mb/s, Strength 30%, Encrypted (WPA)
gregwifi: Infrastructure Mode, Freq 2.417 MHz, Rate 62 Mb/s, Strength 31%, Encrypted (WEP)
babe: Infrastructure Mode, Freq 2.462 MHz, Rate 62 Mb/s, Strength 33%, Encrypted (WPA WPA2)
ALICE-LAN-8F6FA6:Infrastructure Mode, Freq 2.462 MHz, Rate 62 Mb/s, Strength 28%, Encrypted (WPA)
Neuf WiFi: Infrastructure Mode, Freq 2.462 MHz, Rate 62 Mb/s, Strength 31%
NEUF_4C5C: Infrastructure Mode, Freq 2.462 MHz, Rate 62 Mb/s, Strength 28%, Encrypted (WPA)
cris_canal: Infrastructure Mode, Freq 2.462 MHz, Rate 62 Mb/s, Strength 30%, Encrypted (WPA)
DartyBox_79f6: Infrastructure Mode, Freq 2.462 MHz, Rate 62 Mb/s, Strength 30%, Encrypted (WEP)
WANADOO-EB45: Infrastructure Mode, Freq 2.412 MHz, Rate 62 Mb/s, Strength 30%, Encrypted (WPA)
IP Settings:
IP Address: 192.168.0.11
Subnet Mask: 255.255.255.0
Broadcast: 192.168.0.255
Gateway: 192.168.0.254
Primary DNS: 212.27.40.241
Secondary DNS: 212.27.40.240--------------------------- FIN --------------------
Dernière modification par GillouG (Le 22/10/2008, à 15:31)
Hors ligne
#3 Le 22/10/2008, à 14:48
- tylhdar
Re : Signal Wifi anormalement faible
édite ton post pour mettre les balises code.
Dernière modification par tylhdar (Le 22/10/2008, à 14:48)
un matériel non compatible linux est un matériel défectueux
ubuntu 10.4 sur pc1 ; debian squeeze sur pc2
Hors ligne
#4 Le 22/10/2008, à 15:32
- GillouG
Re : Signal Wifi anormalement faible
Voila, c'est fait
Hors ligne
#5 Le 24/05/2009, à 20:44
- Sarathai
Re : Signal Wifi anormalement faible
Bonjour,
J'ai exactement le même probleme ! Up +1
Merci
Hors ligne
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