Bonjour,

Je viens de faire ma mise à niveau, depuis 12.04 LTS vers 14.04 LTS. Depuis, je n'ai plus accès à internet. La carte wifi n'est plus reconnue et lorsque je connecte mon ordinateur à un câble ethernet, il semble que la connexion se fait bien mais il est impossible d'afficher une page internet ou de faire les mises à jours.

Comme je suis un veritable newbe pour tout ce qui touche le réseau, j'ai regardé à quoi doit ressembler les données qui sont censées aider pour le debugging. Je tente de vous fournir tout le nécessaire !

Merci beaucoup !

Version :
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Ubuntu 14.04.1 LTS
uname -r
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3.13.0-35-generic
lspci
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00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) 
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04) 
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04) 
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04) 
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4) 
00:1c.3 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 4 (rev c4) 
00:1c.5 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 6 (rev c4) 
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04) 
00:1f.0 ISA bridge: Intel Corporation HM75 Express Chipset LPC Controller (rev 04) 
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04) 
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04) 
07:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01) 
09:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05)
lspci -vn
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00:00.0 0600: 8086:0104 (rev 09) 
	Subsystem: 1028:0555 
	Flags: bus master, fast devsel, latency 0 
	Capabilities: <access denied> 
 
00:02.0 0300: 8086:0116 (rev 09) (prog-if 00 [VGA controller]) 
	Subsystem: 1028:0555 
	Flags: bus master, fast devsel, latency 0, IRQ 43 
	Memory at f7800000 (64-bit, non-prefetchable) [size=4M] 
	Memory at e0000000 (64-bit, prefetchable) [size=256M] 
	I/O ports at f000 [size=64] 
	Expansion ROM at <unassigned> [disabled] 
	Capabilities: <access denied> 
	Kernel driver in use: i915 
 
00:16.0 0780: 8086:1e3a (rev 04) 
	Subsystem: 1028:0555 
	Flags: bus master, fast devsel, latency 0, IRQ 42 
	Memory at f7d0a000 (64-bit, non-prefetchable) [size=16] 
	Capabilities: <access denied> 
	Kernel driver in use: mei_me 
 
00:1a.0 0c03: 8086:1e2d (rev 04) (prog-if 20 [EHCI]) 
	Subsystem: 1028:0555 
	Flags: bus master, medium devsel, latency 0, IRQ 16 
	Memory at f7d08000 (32-bit, non-prefetchable) [size=1K] 
	Capabilities: <access denied> 
	Kernel driver in use: ehci-pci 
 
00:1b.0 0403: 8086:1e20 (rev 04) 
	Subsystem: 1028:0555 
	Flags: bus master, fast devsel, latency 0, IRQ 44 
	Memory at f7d00000 (64-bit, non-prefetchable) [size=16K] 
	Capabilities: <access denied> 
	Kernel driver in use: snd_hda_intel 
 
00:1c.0 0604: 8086:1e10 (rev c4) (prog-if 00 [Normal decode]) 
	Flags: bus master, fast devsel, latency 0 
	Bus: primary=00, secondary=04, subordinate=04, sec-latency=0 
	Capabilities: <access denied> 
	Kernel driver in use: pcieport 
 
00:1c.3 0604: 8086:1e16 (rev c4) (prog-if 00 [Normal decode]) 
	Flags: bus master, fast devsel, latency 0 
	Bus: primary=00, secondary=07, subordinate=07, sec-latency=0 
	Memory behind bridge: f7c00000-f7cfffff 
	Capabilities: <access denied> 
	Kernel driver in use: pcieport 
 
00:1c.5 0604: 8086:1e1a (rev c4) (prog-if 00 [Normal decode]) 
	Flags: bus master, fast devsel, latency 0 
	Bus: primary=00, secondary=09, subordinate=09, sec-latency=0 
	I/O behind bridge: 0000e000-0000efff 
	Prefetchable memory behind bridge: 00000000f0000000-00000000f00fffff 
	Capabilities: <access denied> 
	Kernel driver in use: pcieport 
 
00:1d.0 0c03: 8086:1e26 (rev 04) (prog-if 20 [EHCI]) 
	Subsystem: 1028:0555 
	Flags: bus master, medium devsel, latency 0, IRQ 23 
	Memory at f7d07000 (32-bit, non-prefetchable) [size=1K] 
	Capabilities: <access denied> 
	Kernel driver in use: ehci-pci 
 
00:1f.0 0601: 8086:1e5d (rev 04) 
	Subsystem: 1028:0555 
	Flags: bus master, medium devsel, latency 0 
	Capabilities: <access denied> 
	Kernel driver in use: lpc_ich 
 
00:1f.2 0106: 8086:1e03 (rev 04) (prog-if 01 [AHCI 1.0]) 
	Subsystem: 1028:0555 
	Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 41 
	I/O ports at f0b0 [size=8] 
	I/O ports at f0a0 [size=4] 
	I/O ports at f090 [size=8] 
	I/O ports at f080 [size=4] 
	I/O ports at f060 [size=32] 
	Memory at f7d06000 (32-bit, non-prefetchable) [size=2K] 
	Capabilities: <access denied> 
	Kernel driver in use: ahci 
 
00:1f.3 0c05: 8086:1e22 (rev 04) 
	Subsystem: 1028:0555 
	Flags: medium devsel, IRQ 11 
	Memory at f7d05000 (64-bit, non-prefetchable) [size=256] 
	I/O ports at f040 [size=32] 
 
07:00.0 0280: 14e4:4365 (rev 01) 
	Subsystem: 1028:0016 
	Flags: bus master, fast devsel, latency 0, IRQ 19 
	Memory at f7c00000 (64-bit, non-prefetchable) [size=32K] 
	Capabilities: <access denied> 
	Kernel driver in use: bcma-pci-bridge 
 
09:00.0 0200: 10ec:8136 (rev 05) 
	Subsystem: 1028:0555 
	Flags: bus master, fast devsel, latency 0, IRQ 40 
	I/O ports at e000 [size=256] 
	Memory at f0004000 (64-bit, prefetchable) [size=4K] 
	Memory at f0000000 (64-bit, prefetchable) [size=16K] 
	Capabilities: <access denied> 
	Kernel driver in use: r8169
lsmod
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Module                  Size  Used by 
usb_storage            62209  0 
snd_hrtimer            12744  1 
ip6table_filter        12815  0 
ip6_tables             27025  1 ip6table_filter 
iptable_filter         12810  0 
ip_tables              27239  1 iptable_filter 
x_tables               34059  4 ip6table_filter,ip_tables,iptable_filter,ip6_tables 
cuse                   13445  3 
rfcomm                 69160  8 
bnep                   19624  2 
binfmt_misc            17468  1 
snd_hda_codec_hdmi     46368  1 
snd_hda_codec_cirrus    18855  1 
uvcvideo               80885  0 
btusb                  32412  0 
videobuf2_vmalloc      13216  1 uvcvideo 
videobuf2_memops       13362  1 videobuf2_vmalloc 
bluetooth             391136  22 bnep,btusb,rfcomm 
videobuf2_core         40664  1 uvcvideo 
videodev              134688  2 uvcvideo,videobuf2_core 
dell_wmi               12761  0 
sparse_keymap          13948  1 dell_wmi 
dell_laptop            18168  0 
dcdbas                 14928  1 dell_laptop 
snd_hda_intel          56451  3 
snd_hda_codec         192906  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_cirrus 
snd_hwdep              13602  1 snd_hda_codec 
snd_pcm               102099  3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel 
snd_page_alloc         18710  2 snd_pcm,snd_hda_intel 
snd_seq_midi           13324  0 
snd_seq_midi_event     14899  1 snd_seq_midi 
intel_rapl             18773  0 
snd_rawmidi            30144  1 snd_seq_midi 
x86_pkg_temp_thermal    14205  0 
intel_powerclamp       14705  0 
coretemp               13435  0 
kvm_intel             143060  0 
snd_seq                61560  3 snd_seq_midi_event,snd_seq_midi 
kvm                   451511  1 kvm_intel 
crct10dif_pclmul       14289  0 
i915                  783805  3 
snd_seq_device         14497  3 snd_seq,snd_rawmidi,snd_seq_midi 
crc32_pclmul           13113  0 
snd_timer              29482  3 snd_hrtimer,snd_pcm,snd_seq 
ghash_clmulni_intel    13216  0 
cryptd                 20359  1 ghash_clmulni_intel 
joydev                 17381  0 
serio_raw              13462  0 
drm_kms_helper         53081  1 i915 
snd                    69322  19 snd_hrtimer,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_hda_codec_cirrus,snd_seq_midi 
bcma                   52096  0 
lpc_ich                21080  0 
drm                   303102  4 i915,drm_kms_helper 
soundcore              12680  1 snd 
mei_me                 18627  0 
mei                    82276  1 mei_me 
i2c_algo_bit           13413  1 i915 
wmi                    19177  1 dell_wmi 
mac_hid                13205  0 
video                  19476  1 i915 
parport_pc             32701  0 
ppdev                  17671  0 
lp                     17759  0 
parport                42348  3 lp,ppdev,parport_pc 
psmouse               106678  0 
ahci                   25819  2 
r8169                  67581  0 
libahci                32716  1 ahci 
mii                    13934  1 r8169
ifconfig
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eth0      Link encap:Ethernet  HWaddr e0:db:55:82:97:43  
          inet adr:192.168.0.101  Bcast:192.168.0.255  Masque:255.255.255.0 
          adr inet6: fe80::e2db:55ff:fe82:9743/64 Scope:Lien 
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1 
          Packets reçus:6283 erreurs:0 :0 overruns:0 frame:0 
          TX packets:249 errors:0 dropped:0 overruns:0 carrier:0 
          collisions:0 lg file transmission:1000 
          Octets reçus:438440 (438.4 KB) Octets transmis:24264 (24.2 KB) 
 
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:1188 erreurs:0 :0 overruns:0 frame:0 
          TX packets:1188 errors:0 dropped:0 overruns:0 carrier:0 
          collisions:0 lg file transmission:0 
          Octets reçus:105374 (105.3 KB) Octets transmis:105374 (105.3 KB)
cat /etc/network/interfaces
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auto lo 
iface lo inet loopback
ping localhost
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PING localhost (127.0.0.1) 56(84) bytes of data. 
64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.049 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.056 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=3 ttl=64 time=0.069 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=4 ttl=64 time=0.080 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=5 ttl=64 time=0.076 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=6 ttl=64 time=0.079 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=7 ttl=64 time=0.065 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=8 ttl=64 time=0.070 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=9 ttl=64 time=0.075 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=10 ttl=64 time=0.074 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=11 ttl=64 time=0.078 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=12 ttl=64 time=0.074 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=13 ttl=64 time=0.082 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=14 ttl=64 time=0.071 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=15 ttl=64 time=0.077 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=16 ttl=64 time=0.078 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=17 ttl=64 time=0.076 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=18 ttl=64 time=0.064 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=19 ttl=64 time=0.070 ms 
64 bytes from localhost (127.0.0.1): icmp_seq=20 ttl=64 time=0.071 ms 
^C 
--- localhost ping statistics --- 
20 packets transmitted, 20 received, 0% packet loss, time 18997ms 
rtt min/avg/max/mdev = 0.049/0.071/0.082/0.012 ms
ping 127.0.0.1
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PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data. 
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.048 ms 
64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.055 ms 
64 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=0.092 ms 
64 bytes from 127.0.0.1: icmp_seq=4 ttl=64 time=0.063 ms 
64 bytes from 127.0.0.1: icmp_seq=5 ttl=64 time=0.069 ms 
64 bytes from 127.0.0.1: icmp_seq=6 ttl=64 time=0.069 ms 
64 bytes from 127.0.0.1: icmp_seq=7 ttl=64 time=0.069 ms 
64 bytes from 127.0.0.1: icmp_seq=8 ttl=64 time=0.065 ms 
64 bytes from 127.0.0.1: icmp_seq=9 ttl=64 time=0.069 ms 
64 bytes from 127.0.0.1: icmp_seq=10 ttl=64 time=0.063 ms 
64 bytes from 127.0.0.1: icmp_seq=11 ttl=64 time=0.073 ms 
64 bytes from 127.0.0.1: icmp_seq=12 ttl=64 time=0.065 ms 
64 bytes from 127.0.0.1: icmp_seq=13 ttl=64 time=0.062 ms 
^C 
--- 127.0.0.1 ping statistics --- 
13 packets transmitted, 13 received, 0% packet loss, time 11998ms 
rtt min/avg/max/mdev = 0.048/0.066/0.092/0.011 ms
netstat -nr
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Table de routage IP du noyau 
Destination     Passerelle      Genmask         Indic   MSS Fenêtre irtt Iface 
0.0.0.0         192.168.0.1     0.0.0.0         UG        0 0          0 eth0 
192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0