Há um mês instalei a mais nova versão do Linux Mint (14).
Eu uso o Linux o dia inteiro no meu laptop, mas a cada 1-2 horas, minha conexão com a Internet (Wi-Fi) magicamente desaparece por cerca de 10 minutos.
Eu recebo este erro quando tento abrir um site no Chrome:
The server at google.com can't be found, because the DNS lookup failed. DNS is the network service that translates a website's name to its Internet address. This error is most often caused by having no connection to the Internet or a misconfigured network. It can also be caused by an unresponsive DNS server or a firewall preventing Google Chrome from accessing the network.
Também não há "ping" quando abro o terminal.
Eu também tenho o Windows instalado na mesma máquina, mas nunca tive problemas como este ao usar o Windows.
Quando a internet desapareceu no Linux, ela ainda está disponível no meu telefone pelo mesmo Wi-Fi. Portanto, a própria conexão com a internet funciona perfeitamente bem.
Alguém tem uma ideia?
Atualizar :
Sou eu de novo. Eu usei o Windows por um tempo, mas tive que mudar para o Linux novamente (Ubuntu desta vez).
A última vez, minha conexão desapareceu, eu tentei os comandos, sugeridos por jasonwryan e Bruce Ediger. Estes são meus resultados:
$ ifconfig -a
eth0 Link encap:Ethernet HWaddr ec:f4:bb:5e:3a:24
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)
Interrupt:20 Memory:f7c00000-f7c20000
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:2953 errors:0 dropped:0 overruns:0 frame:0
TX packets:2953 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:311476 (311.4 KB) TX bytes:311476 (311.4 KB)
wlan0 Link encap:Ethernet HWaddr f8:16:54:9d:62:5f
inet addr:192.168.178.20 Bcast:192.168.178.255 Mask:255.255.255.0
inet6 addr: fe80::fa16:54ff:fe9d:625f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:218583 errors:0 dropped:0 overruns:0 frame:0
TX packets:120476 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:299458438 (299.4 MB) TX bytes:12939161 (12
$ iw dev wlan0 link
Connected to 34:31:c4:67:9b:bc (on wlan0)
SSID: FRITZ!Box 7312
freq: 2412
RX: 183533 bytes (212 packets)
TX: 15958 bytes (227 packets)
signal: -57 dBm
tx bitrate: 115.6 MBit/s MCS 13 short GI
bss flags: short-preamble short-slot-time
dtim period: 1
beacon int: 100
$ dmesg
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 3.16.0-28-generic (buildd@komainu) (gcc version 4.9.1 (Ubuntu 4.9.1-16ubuntu6) ) #37-Ubuntu SMP Mon Dec 8 17:15:28 UTC 2014 (Ubuntu 3.16.0-28.37-generic 3.16.7-ckt1)
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.16.0-28-generic root=UUID=250ef3c4-35b0-4318-aac8-d6855bf852b1 ro quiet splash vt.handoff=7
[ 0.000000] KERNEL supported cpus:
[ 0.000000] Intel GenuineIntel
[ 0.000000] AMD AuthenticAMD
[ 0.000000] Centaur CentaurHauls
[ 0.000000] e820: BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x00000000000913ff] usable
[ 0.000000] BIOS-e820: [mem 0x0000000000091400-0x000000000009ffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000cefe4fff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000cefe5000-0x00000000cefebfff] ACPI NVS
[ 0.000000] BIOS-e820: [mem 0x00000000cefec000-0x00000000cf9e1fff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000cf9e2000-0x00000000cfeaafff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000cfeab000-0x00000000d7db3fff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000d7db4000-0x00000000d7ffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000d8000000-0x00000000d8758fff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000d8759000-0x00000000d87fffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000d8800000-0x00000000d8f99fff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000d8f9a000-0x00000000d8ffffff] ACPI data
[ 0.000000] BIOS-e820: [mem 0x00000000d9000000-0x00000000da71bfff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000da71c000-0x00000000da7fffff] ACPI NVS
[ 0.000000] BIOS-e820: [mem 0x00000000da800000-0x00000000dbcf6fff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000dbcf7000-0x00000000dbffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000dd000000-0x00000000df1fffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000f8000000-0x00000000fbffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fed00000-0x00000000fed03fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1ffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000021edfffff] usable
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] SMBIOS 2.7 present.
[ 0.000000] DMI: Dell Inc. Latitude E5540/0H56PP, BIOS A06 05/01/2014
[ 0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[ 0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[ 0.000000] AGP: No AGP bridge found
[ 0.000000] e820: last_pfn = 0x21ee00 max_arch_pfn = 0x400000000
[ 0.000000] MTRR default type: uncachable
[ 0.000000] MTRR fixed ranges enabled:
[ 0.000000] 00000-9FFFF write-back
[ 0.000000] A0000-BFFFF uncachable
[ 0.000000] C0000-DBFFF write-protect
[ 0.000000] DC000-E7FFF uncachable
[ 0.000000] E8000-FFFFF write-protect
[ 0.000000] MTRR variable ranges enabled:
[ 0.000000] 0 base 0000000000 mask 7E00000000 write-back
//TOO LONG
O conteúdo de /etc/resolv.conf é:
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.1.1
search fritz.box
Nem journalctl | tail nem /var/log/messages foram encontrados.
Quando isso acontece (durante os 10 minutos sem Internet), execute alguns comandos em uma janela de terminal, como usuário root ou usando sudo :
ifconfig -a - procure a saída referente a wlan0
iw dev wlan0 link
dmesg
journalctl | tail ou se journalctl não existir, procure em /var/log/messages
Algo nessa saída deve lhe dar mais para continuar.