USB adaptador wi-fi parou de funcionar, é culpa do dispositivo ou do Ubuntu?

Question

Eu estava feliz em usar um adaptador wi-fi TP-LINK TL-WN722N USB no Kubuntu 14.04. Agora, de repente, parou de funcionar. Quando eu conecto, / var / log / syslog diz coisas como estas:

Sep 30 20:34:08 meles kernel: [47010.291060] usb 3-2: new high-speed USB device number 13 using xhci_hcd
Sep 30 20:34:08 meles kernel: [47010.319034] usb 3-2: New USB device found, idVendor=0cf3, idProduct=9271
Sep 30 20:34:08 meles kernel: [47010.319049] usb 3-2: New USB device strings: Mfr=16, Product=32, SerialNumber=48
Sep 30 20:34:08 meles kernel: [47010.319055] usb 3-2: Product: USB2.0 WLAN
Sep 30 20:34:08 meles kernel: [47010.319059] usb 3-2: Manufacturer: ATHEROS
Sep 30 20:34:08 meles kernel: [47010.319063] usb 3-2: SerialNumber: 12345
Sep 30 20:34:08 meles kernel: [47010.320884] usb 3-2: ath9k_htc: Firmware htc_9271.fw requested
Sep 30 20:34:08 meles ModemManager[802]: <warn>  Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:1c.2/0000:02:00.0/usb3/3-2': not supported by any plugin
Sep 30 20:34:08 meles kernel: [47010.784766] usb 3-2: ath9k_htc: Transferred FW: htc_9271.fw, size: 51272
Sep 30 20:34:08 meles kernel: [47011.020822] ath9k_htc 3-2:1.0: ath9k_htc: HTC initialized with 33 credits
Sep 30 20:34:09 meles kernel: [47011.250691] ath9k_htc 3-2:1.0: ath9k_htc: FW Version: 1.3
Sep 30 20:34:09 meles kernel: [47011.250701] ath: EEPROM regdomain: 0x809c
Sep 30 20:34:09 meles kernel: [47011.250704] ath: EEPROM indicates we should expect a country code
Sep 30 20:34:09 meles kernel: [47011.250708] ath: doing EEPROM country->regdmn map search
Sep 30 20:34:09 meles kernel: [47011.250711] ath: country maps to regdmn code: 0x52
Sep 30 20:34:09 meles kernel: [47011.250715] ath: Country alpha2 being used: CN
Sep 30 20:34:09 meles kernel: [47011.250717] ath: Regpair used: 0x52
Sep 30 20:34:09 meles kernel: [47011.254919] ieee80211 phy15: Atheros AR9271 Rev:1
Sep 30 20:34:09 meles NetworkManager[1076]: <info> (wlan1): using nl80211 for WiFi device control
Sep 30 20:34:09 meles NetworkManager[1076]: <info> (wlan1): driver supports Access Point (AP) mode
Sep 30 20:34:09 meles NetworkManager[1076]: <info> (wlan1): new 802.11 WiFi device (driver: 'ath9k_htc' ifindex: 18)
Sep 30 20:34:09 meles NetworkManager[1076]: <info> (wlan1): exported as /org/freedesktop/NetworkManager/Devices/16
Sep 30 20:34:09 meles NetworkManager[1076]: <info> (wlan1): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Sep 30 20:34:09 meles NetworkManager[1076]: <info> (wlan1): bringing up device.
Sep 30 20:34:09 meles kernel: [47011.344907] usb 3-2: USB disconnect, device number 13
Sep 30 20:34:09 meles kernel: [47011.843938] ath: phy15: Chip reset failed
Sep 30 20:34:09 meles kernel: [47011.843951] ath: phy15: Unable to reset channel (2412 Mhz) reset status -22
Sep 30 20:34:09 meles kernel: [47011.843980] ath: phy15: Unable to set channel
Sep 30 20:34:09 meles kernel: [47011.945316] ath: phy15: RX failed to go idle in 10 ms RXSM=0xeaffffff
Sep 30 20:34:09 meles kernel: [47011.946506] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready
Sep 30 20:34:09 meles kernel: [47011.955443] ath: phy15: Failed to wakeup in 500us
Sep 30 20:34:09 meles kernel: [47012.056695] ath: phy15: RX failed to go idle in 10 ms RXSM=0xe41da337
Sep 30 20:34:09 meles kernel: [47012.066754] ath: phy15: Failed to wakeup in 500us
Sep 30 20:34:09 meles kernel: [47012.168010] ath: phy15: RX failed to go idle in 10 ms RXSM=0xe41da337
Sep 30 20:34:10 meles kernel: [47012.192423] ath: phy15: Failed to wakeup in 500us
Sep 30 20:34:10 meles kernel: [47012.293854] ath: phy15: RX failed to go idle in 10 ms RXSM=0xb872752f
Sep 30 20:34:10 meles kernel: [47012.699081] ath: phy15: RX failed to go idle in 10 ms RXSM=0xb872752f
Sep 30 20:34:10 meles NetworkManager[1076]: <warn> (18) failed to find interface name for index
Sep 30 20:34:10 meles NetworkManager[1076]: (nm-system.c:766):nm_system_iface_get_flags: runtime check failed: (iface != NULL)
Sep 30 20:34:10 meles NetworkManager[1076]: <error> [1443638050.555454] [nm-system.c:768] nm_system_iface_get_flags(): (unknown): failed to get interface link object
Sep 30 20:34:10 meles NetworkManager[1076]: <warn> (18) failed to find interface name for index
Sep 30 20:34:10 meles NetworkManager[1076]: (nm-system.c:766):nm_system_iface_get_flags: runtime check failed: (iface != NULL)
Sep 30 20:34:10 meles NetworkManager[1076]: <error> [1443638050.555961] [nm-system.c:768] nm_system_iface_get_flags(): (unknown): failed to get interface link object
Sep 30 20:34:10 meles NetworkManager[1076]: <warn> (18) failed to find interface name for index
Sep 30 20:34:10 meles NetworkManager[1076]: (nm-system.c:766):nm_system_iface_get_flags: runtime check failed: (iface != NULL)
Sep 30 20:34:10 meles NetworkManager[1076]: <error> [1443638050.556434] [nm-system.c:768] nm_system_iface_get_flags(): (unknown): failed to get interface link object
Sep 30 20:34:10 meles NetworkManager[1076]: <warn> (18) failed to find interface name for index
Sep 30 20:34:10 meles NetworkManager[1076]: (nm-system.c:766):nm_system_iface_get_flags: runtime check failed: (iface != NULL)
Sep 30 20:34:10 meles NetworkManager[1076]: <error> [1443638050.557402] [nm-system.c:768] nm_system_iface_get_flags(): (unknown): failed to get interface link object
Sep 30 20:34:10 meles NetworkManager[1076]: <warn> (18) failed to find interface name for index
Sep 30 20:34:10 meles NetworkManager[1076]: (nm-system.c:766):nm_system_iface_get_flags: runtime check failed: (iface != NULL)
Sep 30 20:34:10 meles NetworkManager[1076]: <error> [1443638050.557948] [nm-system.c:768] nm_system_iface_get_flags(): (unknown): failed to get interface link object
Sep 30 20:34:10 meles ModemManager[802]: <info>  (net/wlan1): released by modem /sys/devices/pci0000:00/0000:00:1c.2/0000:02:00.0/usb3/3-2
Sep 30 20:34:10 meles NetworkManager[1076]: <warn> (18) failed to find interface name for index
Sep 30 20:34:10 meles NetworkManager[1076]: (nm-system.c:766):nm_system_iface_get_flags: runtime check failed: (iface != NULL)
Sep 30 20:34:10 meles NetworkManager[1076]: <error> [1443638050.558456] [nm-system.c:768] nm_system_iface_get_flags(): (unknown): failed to get interface link object
Sep 30 20:34:10 meles NetworkManager[1076]: <warn> (18) failed to find interface name for index
Sep 30 20:34:10 meles NetworkManager[1076]: (nm-system.c:766):nm_system_iface_get_flags: runtime check failed: (iface != NULL)
Sep 30 20:34:10 meles NetworkManager[1076]: <error> [1443638050.559112] [nm-system.c:768] nm_system_iface_get_flags(): (unknown): failed to get interface link object
Sep 30 20:34:10 meles NetworkManager[1076]: <warn> (18) failed to find interface name for index

etc.

Ele estava funcionando bem, então eu atualizei o kernel (e algumas outras coisas, eu acho), desconectei-o, reiniciei e ele não funcionou mais. Eu tentei arrancar com o kernel anterior, sem alegria. Eu tentei em outro computador, onde ele também costumava trabalhar (mas já faz mais tempo desde a última vez que tentei lá), e é o mesmo.

Nada acende no dispositivo e suspeito que possa haver algo errado com ele e não com o sistema operacional. Há mais alguma coisa que eu possa fazer para descobrir qual é o problema?

    

Answer 1

Dado que você tentou em vários computadores e as luzes do adaptador não ligam quando conectado, é quase um problema de hardware.

Além disso, a linha usb 3-2: USB disconnect, device number 13 sugere que o adaptador está desconectando ou falhando quando o sistema operacional tenta ligar o rádio. Como essa mensagem é do driver USB, é praticamente um problema de hardware no adaptador.

Se você quiser depurar ainda mais, pode tentar instalá-lo em um computador Windows, mas parece que o adaptador está morto. Provavelmente hora de conseguir um novo.