Ligue o terminal em Shift + ALT + T
tipo
sudo dhclient wlan0
Feito.
Eu tenho uma nova instalação do Ubuntu 13.04 desktop (instalado ontem). O WiFi tem funcionado bem por muitas horas, de repente eu não consigo mais carregar nenhuma página. Eu tenho outro laptop executando o Windows 8, que agora estou usando ao lado do meu laptop Ubuntu, e o wifi está funcionando bem. Eu reiniciei o meu modem wi-fi, embora parecesse estar funcionando bem de qualquer maneira. Eu desconectei, reconectei ao meu roteador wifi da barra de menu superior do Ubuntu. Eu reiniciei meu laptop Ubuntu, ainda não consigo carregar nenhuma página, embora pareça que estou conectado. Eu tive o mesmo problema há uma semana com uma nova instalação do Ubuntu 13.04 (que eu já instalei), e depois de cerca de meia hora o problema foi embora. Parece muito pouco confiável, porém, quando meu laptop Windows está funcionando bem. Qualquer ajuda seria apreciada.
EDITAR:
$ ping -c5 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
--- 8.8.8.8 ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 4031ms
$ sudo lshw -class network
*-network
description: Wireless interface
product: AR9285 Wireless Network Adapter (PCI-Express)
vendor: Atheros Communications Inc.
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan0
version: 01
serial: e0:b9:a5:2d:1f:bf
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=3.8.0-26-generic firmware=N/A latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
resources: irq:17 memory:de700000-de70ffff
*-network
description: Ethernet interface
product: RTL8111/8168 PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:05:00.0
logical name: eth0
version: 06
serial: bc:ae:c5:64:26:94
size: 10Mbit/s
capacity: 1Gbit/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 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl_nic/rtl8168e-2.fw latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:41 ioport:9000(size=256) memory:d2104000-d2104fff memory:d2100000-d2103fff
$ lspci
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (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 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5)
00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5)
00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5)
00:1c.5 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 6 (rev b5)
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05)
01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 540M] (rev a1)
02:00.0 Multimedia controller: Philips Semiconductors SAA7231 (rev ca)
03:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
04:00.0 USB controller: Fresco Logic FL1000G USB 3.0 Host Controller (rev 04)
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI Express Gigabit Ethernet controller (rev 06)
EDIT2:
$ ifconfig
eth0 Link encap:Ethernet HWaddr bc:ae:c5:64:26:94
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)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:743 errors:0 dropped:0 overruns:0 frame:0
TX packets:743 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:50506 (50.5 KB) TX bytes:50506 (50.5 KB)
wlan0 Link encap:Ethernet HWaddr e0:b9:a5:2d:1f:bf
inet6 addr: fe80::e2b9:a5ff:fe2d:1fbf/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1900 errors:0 dropped:0 overruns:0 frame:0
TX packets:982 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:457035 (457.0 KB) TX bytes:107425 (107.4 KB)
$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 wlan0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 wlan0
192.168.1.1 0.0.0.0 255.255.255.255 UH 0 0 0 wlan0
EDIT3:
$ sudo dhclient wlan0
$ ifconfig wlan0
wlan0 Link encap:Ethernet HWaddr e0:b9:a5:2d:1f:bf
inet addr:192.168.1.5 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::e2b9:a5ff:fe2d:1fbf/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2124 errors:0 dropped:0 overruns:0 frame:0
TX packets:1170 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:512506 (512.5 KB) TX bytes:136944 (136.9 KB)
Ligue o terminal em Shift + ALT + T
tipo
sudo dhclient wlan0
Feito.