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Thomas Jung avatar

Le WiFi ne se connecte pas de manière fiable au démarrage/redémarrage du serveur Ubuntu

Demandé el 16 de Mai, 2015
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Situation réelle de la question

J'utilise Ubuntu Server 14.04.2 LTS et l'adaptateur micro sans fil TP-LINK TL-WN725N .

J'ai des problèmes avec la connexion automatique au démarrage. Si je redémarre 10 fois, il se peut qu'il ne se connecte que 4 à 6 fois. En cas d'échec, j'arrive toujours à me connecter avec :

sudo ifdown wlan0
sudo ifup wlan0

lsusb de la production :

user@ubuntu:~$ lsusb
Bus 001 Device 004: ID 058f:6377 Alcor Micro Corp. Multimedia Card Reader
Bus 001 Device 003: ID 0bda:8179 Realtek Semiconductor Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 002: ID 046d:c534 Logitech, Inc.
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

dmesg avant de redémarrer le réseau :

user@ubuntu:~$ dmesg
[   16.105721] EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro
[   16.801211] R8188EU: INFO indicate disassoc
[   17.145207] init: failsafe main process (651) killed by TERM signal
[   17.524498] init: network-manager main process (767) terminated with status 127
[   17.524520] init: network-manager main process ended, respawning
[   19.066032] init: plymouth-upstart-bridge main process ended, respawning

interfaces fichier :

user@ubuntu:~$ sudo vim /etc/network/interfaces
auto lo
iface lo inet loopback

auto wlan0
iface wlan0 inet static
address 192.168.1.150
netmask 255.255.255.0
gateway 192.168.1.1
wpa-ssid the-ssid
wpa-psk the-pw
dns-nameservers 8.8.8.8 192.168.1.1

ifup qui se connecte avec succès :

user@ubuntu:~$ sudo ifup wlan0
ioctl[SIOCSIWAP]: Operation not permitted
ioctl[SIOCSIWENCODEEXT]: Invalid argument
ioctl[SIOCSIWENCODEEXT]: Invalid argument

UPDATE : Informations supplémentaires, que nous espérons utiles :

J'ai couru wpa_cli -i wlan0 status et il renvoie Failed to connect to non-global ctrl_ifname wlan0 error: Permission denied .

J'ai regardé /var/log/upstart/network-interface-wlan0.log et il montre Failed to connect to non-global ctrl_ifname: wlan0 error: Read-only file system .

dmesg après sudo apt-get purge network-manager :

[   14.539832] R8188EU: Firmware Version 11, SubVersion 1, Signature 0x88e1
[   14.660066] floppy0: no floppy controllers found
[   14.660083] work still pending
[   14.916594] MAC Address = e8:de:27:a3:e7:f6
[   14.921775] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   14.921802] cfg80211: World regulatory domain updated:
[   14.921806] cfg80211:  DFS Master region: unset
[   14.921809] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[   14.921814] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[   14.921817] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[   14.921821] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[   14.921824] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[   14.921828] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[   16.233140] R8188EU: INFO indicate disassoc

MISE À JOUR 2 : Résultats de la sudo ifdown wlan0 && sudo ifup -v wlan0 :

Configuring interface wlan0=wlan0 (inet)
run-parts --verbose /etc/network/if-pre-up.d
run-parts: executing /etc/network/if-pre-up.d/ethtool
run-parts: executing /etc/network/if-pre-up.d/wireless-tools
run-parts: executing /etc/network/if-pre-up.d/wpasupplicant
wpa_supplicant: wpa-driver nl80211,wext (default)
wpa_supplicant: /sbin/wpa_supplicant -s -B -P /var/run/wpa_supplicant.wlan0.pid -i wlan0 -D nl80211,wext -C /var/run/wpa_supplicant
Starting /sbin/wpa_supplicant...
ioctl[SIOCSIWAP]: Operation not permitted
ioctl[SIOCSIWENCODEEXT]: Invalid argument
ioctl[SIOCSIWENCODEEXT]: Invalid argument
wpa_supplicant: creating sendsigs omission pidfile: /run/sendsigs.omit.d/wpasupplicant.wpa_supplicant.wlan0.pid
wpa_supplicant: ctrl_interface socket located at /var/run/wpa_supplicant/wlan0
wpa_supplicant: configuring network block -- 0
wpa_supplicant: wpa-ssid "the-ssid" -- OK
wpa_supplicant: wpa-psk ***** -- OK
wpa_supplicant: enabling network block 0 -- OK
ip addr add 192.168.1.150/255.255.255.0 broadcast 192.168.1.255           dev wlan0 label wlan0
ip link set dev wlan0   up
 ip route add default via 192.168.1.1  dev wlan0
run-parts --verbose /etc/network/if-up.d
run-parts: executing /etc/network/if-up.d/000resolvconf
run-parts: executing /etc/network/if-up.d/ethtool
run-parts: executing /etc/network/if-up.d/ntpdate
run-parts: executing /etc/network/if-up.d/openssh-server
run-parts: executing /etc/network/if-up.d/upstart
run-parts: executing /etc/network/if-up.d/wpasupplicant
Demandé el 16 de Mai, 2015 par Thomas Jung

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0voto

Mostafa A. Hamid avatar
Mostafa A. Hamid Points 167

Utilisez la commande suivante

sudo gedit /var/lib/NetworkManager/NetworkManager.state

make sure that these attributes are identical.

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true

Save the file and restart network manager as follows:

sudo service networkmanager restart
sudo service network restart

Use the following command if you want a specific adapter to be used and not the whole network manager to start

sudo ifconfig

For wireless connection use

sudo iwconfig

To get a list of all the adapters that you have on your machine with their names

sudo ifconfig wlan0 up

You can replace wlan0 with the adapter name that you have on your machine in case you have wireless connection.

sudo ifconfig eth0 up

You can replace eth0 with the adapter name that you have on your machine in case you have wired connection.
Répondu el 16 de Mai, 2015 par Mostafa A. Hamid (167 Points )

0voto

user167850 avatar
user167850 Points 230

Il s'agit du même problème de pilote Realtek. Vous pouvez installer un bon pilote avec des correctifs. Exécuter

sudo apt-get install git
git clone https://github.com/lwfinger/rtlwifi_new.git
cd rtlwifi_new
make
sudo make install

Et redémarrer.

Répondu el 17 de Mai, 2015 par user167850 (230 Points )

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