Dependendo da rede à qual estou conectado, a Internet (sem fio) será desconectada a cada 30 segundos a cada poucas horas. A frequência com que eu saio (aparentemente) depende da rede e da quantidade de tráfego que passa por ela. Isso me leva a acreditar que a colisão de pacotes está causando problemas.
Quando desistir do ícone do Unity mostra que ainda estou conectado, embora não consiga fazer o ping no Google, no Facebook ou em qualquer outro site, eles ainda podem ser acessados por meio de outros dispositivos na mesma rede.
Ocasionalmente, mas nem sempre, isso pode ser simplesmente corrigido ao desconectar e reconectar, excluindo a rede através do gerenciador de rede ou reiniciando o computador. Isso não é preferível.
Estou usando o Ubuntu 14.04, aqui está a saída de lspci -v e lshw -C network . Não tenho o conhecimento nem o tempo para diagnosticar muito mais sozinho. Respostas para outras perguntas não funcionaram para mim. Eu apreciaria qualquer ajuda.
lspci -v
ashton@laptop:~$ lspci -v
00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09)
Subsystem: Sony Corporation Device 90ab
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port (rev 09) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=06, sec-latency=0
I/O behind bridge: 00003000-00003fff
Memory behind bridge: c0000000-c0ffffff
Prefetchable memory behind bridge: 00000000b0000000-00000000bfffffff
Capabilities: <access denied>
Kernel driver in use: pcieport
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04) (prog-if 30 [XHCI])
Subsystem: Sony Corporation Device 90ab
Flags: bus master, medium devsel, latency 0, IRQ 41
Memory at c1300000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: xhci_hcd
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)
Subsystem: Sony Corporation Device 90ab
Flags: bus master, fast devsel, latency 0, IRQ 45
Memory at c1314000 (64-bit, non-prefetchable) [size=16]
Capabilities: <access denied>
Kernel driver in use: mei_me
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04) (prog-if 20 [EHCI])
Subsystem: Sony Corporation Device 90ab
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at c1319000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci-pci
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
Subsystem: Sony Corporation Device 90ab
Flags: bus master, fast devsel, latency 0, IRQ 46
Memory at c1310000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (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: c1200000-c12fffff
Prefetchable memory behind bridge: 00000000c1500000-00000000c15fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 (rev c4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=08, subordinate=08, sec-latency=0
Memory behind bridge: c1100000-c11fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 (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: 00002000-00002fff
Prefetchable memory behind bridge: 00000000c1000000-00000000c10fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04) (prog-if 20 [EHCI])
Subsystem: Sony Corporation Device 90ab
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at c1318000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci-pci
00:1f.0 ISA bridge: Intel Corporation HM76 Express Chipset LPC Controller (rev 04)
Subsystem: Sony Corporation Device 90ab
Flags: bus master, medium devsel, latency 0
Capabilities: <access denied>
Kernel driver in use: lpc_ich
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04) (prog-if 01 [AHCI 1.0])
Subsystem: Sony Corporation Device 90ab
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 44
I/O ports at 4048 [size=8]
I/O ports at 4054 [size=4]
I/O ports at 4040 [size=8]
I/O ports at 4050 [size=4]
I/O ports at 4020 [size=32]
Memory at c1317000 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
Kernel driver in use: ahci
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)
Subsystem: Sony Corporation Device 90ab
Flags: medium devsel, IRQ 10
Memory at c1315000 (64-bit, non-prefetchable) [size=256]
I/O ports at 4000 [size=32]
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Thames [Radeon HD 7550M/7570M/7650M] (prog-if 00 [VGA controller])
Subsystem: Sony Corporation Device 90ab
Flags: bus master, fast devsel, latency 0, IRQ 47
Memory at b0000000 (64-bit, prefetchable) [size=256M]
Memory at c0000000 (64-bit, non-prefetchable) [size=128K]
I/O ports at 3000 [size=256]
Expansion ROM at c0040000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: radeon
01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Turks/Whistler HDMI Audio [Radeon HD 6000 Series]
Subsystem: Sony Corporation Device 90ab
Flags: bus master, fast devsel, latency 0, IRQ 48
Memory at c0020000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
07:00.0 Network controller: Qualcomm Atheros AR9485 Wireless Network Adapter (rev 01)
Subsystem: Foxconn International, Inc. Device e044
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at c1200000 (64-bit, non-prefetchable) [size=512K]
Expansion ROM at c1500000 [disabled] [size=64K]
Capabilities: <access denied>
Kernel driver in use: ath9k
08:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5209 PCI Express Card Reader (rev 01)
Subsystem: Sony Corporation Device 90ab
Flags: bus master, fast devsel, latency 0, IRQ 42
Memory at c1100000 (32-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: rtsx_pci
09:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 07)
Subsystem: Sony Corporation Device 90ab
Flags: bus master, fast devsel, latency 0, IRQ 43
I/O ports at 2000 [size=256]
Memory at c1004000 (64-bit, prefetchable) [size=4K]
Memory at c1000000 (64-bit, prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: r8169
lshw -C network
ashton@laptop:~$ sudo lshw -C network
*-network
description: Wireless interface
product: AR9485 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:07:00.0
logical name: wlan0
version: 01
serial: 08:3e:8e:d2:5d:81
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=3.13.0-29-generic firmware=N/A ip=192.168.0.6 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
resources: irq:16 memory:c1200000-c127ffff memory:c1500000-c150ffff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:09:00.0
logical name: eth0
version: 07
serial: 30:f9:ed:c3:f2:e3
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=rtl8168e-3_0.0.4 03/27/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:43 ioport:2000(size=256) memory:c1004000-c1004fff memory:c1000000-c1003fff
Eu notei na janela "Connection Information" acessível através do networkManager que a velocidade geralmente mostra como 16Mb / s para cima se eu posso ou não acessar a Internet no momento.
Editar:
Ao tentar isso:
sudo ifconfig wlan0 down && sudo modprobe -rv ath9k && sudo modprobe -v ath9k nohwcrypt=1 && sudo ifconfig wlan0 up
Isso acontece (independentemente de a internet estar funcionando na hora)
Dois cenários diferentes encontrados, incapazes de isolar o comportamento de ramificação.
Cenário A
Nada acontece
Cenário B
As opções suspensas reaparecem e o networkManager tenta se reconectar, mas sempre falha.
A única maneira de saber como recuperar uma conexão daqui é reiniciar o computador.
[1] (do console):
ashton@laptop:~$ sudo ifconfig wlan0 down && sudo modprobe -rv ath9k && sudo modprobe -v ath9k nohwcrypt=1 && sudo ifconfig wlan0 up
[sudo] password for ashton:
rmmod ath9k
rmmod mac80211
rmmod ath9k_common
rmmod ath9k_hw
rmmod ath
rmmod cfg80211
insmod /lib/modules/3.13.0-29-generic/kernel/net/wireless/cfg80211.ko
insmod /lib/modules/3.13.0-29-generic/kernel/net/mac80211/mac80211.ko
insmod /lib/modules/3.13.0-29-generic/kernel/drivers/net/wireless/ath/ath.ko
insmod /lib/modules/3.13.0-29-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_hw.ko
insmod /lib/modules/3.13.0-29-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k_common.ko
insmod /lib/modules/3.13.0-29-generic/kernel/drivers/net/wireless/ath/ath9k/ath9k.ko nohwcrypt=1