Merci de ta réponse. J'ai testé ta première solution du dernier post sans succès.
J'ai eu quelques problèmes en plus par rapport à ma wifi : J'ai le symbole en haut comme quoi je suis connecté en filiaire (les deux flèches) alors que non.
A mon avis un bug de network manager. Mais j'espère qua ça va s'arranger parce que sans connection internet impossible d'installer wicd.
Bref, jvais essayer de voir ça.
J'en saurais probablement plus demain
Je poste le wireless-info lorsque ma wifi bug:
########## wireless info START ##########
Report from: 08 Nov 2016 19:50 CET +0100
Booted last: 08 Nov 2016 00:00 CET +0100
Script from: 08 Jul 2016 02:16 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 16.04.1 LTS
Release: 16.04
Codename: xenial
##### kernel ############################
Linux 4.4.0-45-generic #66-Ubuntu SMP Wed Oct 19 14:12:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, radeon.audio=1
##### desktop ###########################
Ubuntu
##### lspci #############################
02:00.0 Network controller [0280]: MEDIATEK Corp. MT7630e 802.11bgn Wireless Network Adapter [14c3:7630]
Subsystem: Foxconn International, Inc. MT7630e 802.11bgn Wireless Network Adapter [105b:e074]
Kernel driver in use: mt7630e
03:00.2 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 0a)
Subsystem: ASUSTeK Computer Inc. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [1043:200f]
Kernel driver in use: r8169
##### lsusb #############################
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 04f2:b40a Chicony Electronics Co., Ltd
Bus 001 Device 003: ID 0e8d:763f MediaTek Inc.
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID abcd:1234 Unknown
Bus 003 Device 002: ID 1c4f:0034 SiGma Micro
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
##### PCMCIA card info ##################
##### rfkill ############################
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
1: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
##### lsmod #############################
mac80211 737280 1 mt7630e
cfg80211 565248 2 mac80211,mt7630e
wmi 20480 0
##### interfaces ########################
auto lo
iface lo inet loopback
auto wlp2s0f0
iface wlp2s0f0 inet dhcp
##### ifconfig ##########################
enp3s0f2 Link encap:Ethernet HWaddr <MAC 'enp3s0f2' [IF1]>
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
wlp2s0f0 Link encap:Ethernet HWaddr <MAC 'wlp2s0f0' [IF2]>
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
##### iwconfig ##########################
lo no wireless extensions.
enp3s0f2 no wireless extensions.
wlp2s0f0 IEEE 802.11bgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
##### resolv.conf #######################
##### network managers ##################
Installed:
NetworkManager
Running:
root 768 1 0 19:48 ? 00:00:00 /usr/sbin/NetworkManager --no-daemon
##### NetworkManager info ###############
GENERAL.DEVICE: enp3s0f2
GENERAL.TYPE: ethernet
GENERAL.NM-TYPE: NMDeviceEthernet
GENERAL.VENDOR: Realtek Semiconductor Co., Ltd.
GENERAL.PRODUCT: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
GENERAL.DRIVER: r8169
GENERAL.DRIVER-VERSION: 2.3LK-NAPI
GENERAL.FIRMWARE-VERSION:
GENERAL.HWADDR: <MAC 'enp3s0f2' [IF1]>
GENERAL.MTU: 1500
GENERAL.STATE: 20 (unavailable)
GENERAL.REASON: 2 (Device is now managed)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.3/0000:03:00.2/net/enp3s0f2
GENERAL.IP-IFACE:
GENERAL.IS-SOFTWARE: no
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.NM-PLUGIN-MISSING: no
GENERAL.PHYS-PORT-ID: --
GENERAL.CONNECTION: --
GENERAL.CON-UUID: --
GENERAL.CON-PATH: --
GENERAL.METERED: unknown
CAPABILITIES.CARRIER-DETECT: yes
CAPABILITIES.SPEED: unknown
CAPABILITIES.IS-SOFTWARE: no
WIRED-PROPERTIES.CARRIER: off
CONNECTIONS.AVAILABLE-CONNECTION-PATHS:
GENERAL.DEVICE: wlp2s0f0
GENERAL.TYPE: wifi
GENERAL.NM-TYPE: NMDeviceWifi
GENERAL.VENDOR: MEDIATEK Corp.
GENERAL.PRODUCT: MT7630e 802.11bgn Wireless Network Adapter
GENERAL.DRIVER: mt7630e
GENERAL.DRIVER-VERSION: 4.4.0-45-generic
GENERAL.FIRMWARE-VERSION: 112.3
GENERAL.HWADDR: <MAC 'wlp2s0f0' [IF2]>
GENERAL.MTU: 1500
GENERAL.STATE: 10 (unmanaged)
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /virtual/device/placeholder/2
GENERAL.IP-IFACE: wlp2s0f0
GENERAL.IS-SOFTWARE: no
GENERAL.NM-MANAGED: no
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.NM-PLUGIN-MISSING: no
GENERAL.PHYS-PORT-ID: --
GENERAL.CONNECTION: --
GENERAL.CON-UUID: --
GENERAL.CON-PATH: --
GENERAL.METERED: unknown
CAPABILITIES.CARRIER-DETECT: no
CAPABILITIES.SPEED: unknown
CAPABILITIES.IS-SOFTWARE: no
WIFI-PROPERTIES.WEP: yes
WIFI-PROPERTIES.WPA: yes
WIFI-PROPERTIES.WPA2: yes
WIFI-PROPERTIES.TKIP: yes
WIFI-PROPERTIES.CCMP: yes
WIFI-PROPERTIES.AP: yes
WIFI-PROPERTIES.ADHOC: yes
WIFI-PROPERTIES.2GHZ: yes
WIFI-PROPERTIES.5GHZ: no
CONNECTIONS.AVAILABLE-CONNECTION-PATHS:
IP4.GATEWAY:
IP6.GATEWAY:
SSID BSSID MODE CHAN FREQ RATE SIGNAL BARS SECURITY ACTIVE *
##### NetworkManager.state ##############
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
##### NetworkManager.conf ###############
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=false
##### NetworkManager profiles ###########
[[/etc/NetworkManager/system-connections/SmartCampus]] (600 root)
[connection] id=SmartCampus | type=wifi | permissions=user:antoine:;
[wifi] mac-address=<MAC 'wlp2s0f0' [IF2]> | mac-address-blacklist= | ssid=SmartCampus
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/Livebox-4dc4]] (600 root)
[connection] id=Livebox-4dc4 | type=wifi | permissions=user:antoine:;
[wifi] mac-address=<MAC 'wlp2s0f0' [IF2]> | mac-address-blacklist= | ssid=Livebox-4dc4
[ipv4] method=auto
[ipv6] method=auto
##### iw reg get ########################
Region: Europe/Paris (based on set time zone)
country 00: DFS-UNSET
(2402 - 2472 @ 40), (N/A, 20), (N/A)
(2457 - 2482 @ 40), (N/A, 20), (N/A), NO-IR
(2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, NO-IR
(5170 - 5250 @ 80), (N/A, 20), (N/A), NO-IR
(5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, NO-IR
(5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, NO-IR
(5735 - 5835 @ 80), (N/A, 20), (N/A), NO-IR
(57240 - 63720 @ 2160), (N/A, 0), (N/A)
##### iwlist channels ###################
lo no frequency information.
enp3s0f2 no frequency information.
wlp2s0f0 14 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
Channel 14 : 2.484 GHz
##### iwlist scan #######################
lo Interface doesn't support scanning.
enp3s0f2 Interface doesn't support scanning.
Channel occupancy:
1 APs on Frequency:2.432 GHz (Channel 5)
1 APs on Frequency:2.452 GHz (Channel 9)
1 APs on Frequency:2.472 GHz (Channel 13)
wlp2s0f0 Scan completed :
Cell 01 - Address: <MAC 'SmartCampus' [AC1]>
Channel:5
Frequency:2.432 GHz (Channel 5)
Quality=70/70 Signal level=56 dBm
Encryption key:off
ESSID:"SmartCampus"
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=000000025feef041
Extra: Last beacon: 88ms ago
Cell 02 - Address: <MAC 'SmartCampus' [AC2]>
Channel:9
Frequency:2.452 GHz (Channel 9)
Quality=70/70 Signal level=50 dBm
Encryption key:off
ESSID:"SmartCampus"
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=000000004ef01436
Extra: Last beacon: 88ms ago
Cell 03 - Address: <MAC 'SmartCampus' [AC3]>
Channel:13
Frequency:2.472 GHz (Channel 13)
Quality=70/70 Signal level=50 dBm
Encryption key:off
ESSID:"SmartCampus"
Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s
36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=00000004444c2180
Extra: Last beacon: 308ms ago
##### module infos ######################
[mac80211]
filename: /lib/modules/4.4.0-45-generic/kernel/net/mac80211/mac80211.ko
license: GPL
description: IEEE 802.11 subsystem
srcversion: F1176862D12ECD05A1066CF
depends: cfg80211
intree: Y
vermagic: 4.4.0-45-generic SMP mod_unload modversions
parm: minstrel_vht_only:Use only VHT rates when VHT is supported by sta. (bool)
parm: max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int)
parm: max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int)
parm: beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int)
parm: probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int)
parm: ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp)
[cfg80211]
filename: /lib/modules/4.4.0-45-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: 25A45701AAA64DAC1E47D9D
depends:
intree: Y
vermagic: 4.4.0-45-generic SMP mod_unload modversions
parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)
##### module parameters #################
[mac80211]
beacon_loss_count: 7
ieee80211_default_rc_algo: minstrel_ht
max_nullfunc_tries: 2
max_probe_tries: 5
minstrel_vht_only: Y
probe_wait_ms: 500
[cfg80211]
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00
##### /etc/modules ######################
##### modprobe options ##################
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac
blacklist asus_nb_wmi
[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off
[/etc/modprobe.d/intel-microcode-blacklist.conf]
blacklist microcode
[/etc/modprobe.d/iwlmvm.conf]
options iwlmvm power_scheme=1
[/etc/modprobe.d/iwlwifi.conf]
options iwlwifi bt_coex_active=N swcrypto=1 11n_disable=1
[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en
[/etc/modprobe.d/rtl8723be.conf]
options rtl8723be fwlps=N ips=N
##### rc.local ##########################
exit 0
##### pm-utils ##########################
##### udev rules ########################
##### dmesg #############################
[ 13.960882] ieee80211 phy0: rt2x00_set_rt: Info - RT chipset 7630, rev 0002 detected
[ 13.962882] ieee80211 phy0: rt2x00_set_rf: Info - RF chipset 7630 detected
[ 15.306788] mt7630e 0000:02:00.0 wlp2s0f0: renamed from wlan0
[ 40.331743] ieee80211 phy0: rt2x00lib_request_firmware: Info - Loading firmware file 'MT7650E234.bin'
[ 41.035066] ieee80211 phy0: rt2x00lib_request_firmware: Info - Firmware detected - version: 112.3
[ 41.117678] IPv6: ADDRCONF(NETDEV_UP): wlp2s0f0: link is not ready
[ 41.608627] IPv6: ADDRCONF(NETDEV_UP): enp3s0f2: link is not ready
[ 41.768623] r8169 0000:03:00.2 enp3s0f2: link down
[ 41.768682] IPv6: ADDRCONF(NETDEV_UP): enp3s0f2: link is not ready
########## wireless info END ############
merci !!