USB para Ethernet (ASIX AX88772B) parou de funcionar após as atualizações

Question

Após algumas atualizações, minha ethernet USB parou de funcionar. Ele conecta corretamente e até mesmo alguns pings passam por alguns segundos, mas tudo pára. Ele ainda funciona no Windows 8 (tenho dual boot) e no Ubuntu 14.04 Live USB, mas não funciona no Ubuntu 15.04 Live USB.

Aqui está parte relevante do dmesg:

[  243.849944] usb 1-1: new high-speed USB device number 2 using xhci_hcd
[  244.047559] usb 1-1: New USB device found, idVendor=0b95, idProduct=7e2b
[  244.047572] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  244.047578] usb 1-1: Product: AX88772B
[  244.047583] usb 1-1: Manufacturer: ASIX Elec. Corp.
[  244.047587] usb 1-1: SerialNumber: 0049C7
[  245.971324] asix 1-1:1.0 eth0: register 'asix' at usb-0000:00:14.0-1, ASIX AX88772 USB 2.0 Ethernet, 9c:**:**:**:**:**
[  245.971419] usbcore: registered new interface driver asix
[  246.019793] asix 1-1:1.0 eth0: link down
[  247.711932] asix 1-1:1.0 eth0: link up, 100Mbps, full-duplex, lpa 0x4DE1

Aqui estão uname , lsusb , ifconfig e lshw outputs:

$ uname -a
Linux suor-xps 3.19.0-22-generic #22-Ubuntu SMP Tue Jun 16 17:15:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

$ lsusb 
Bus 004 Device 003: ID 8087:07da Intel Corp. 
Bus 004 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 003: ID 0c45:644d Microdia 
Bus 003 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 0b95:7e2b ASIX Electronics Corp. AX88772B
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr 9c:**:**:**:**:**  
          inet addr:192.168.0.105  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::****:****:****:****/** Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:67 errors:0 dropped:0 overruns:0 frame:0
          TX packets:185 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:14403 (14.4 KB)  TX bytes:28244 (28.2 KB)

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:2870 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2870 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:533721 (533.7 KB)  TX bytes:533721 (533.7 KB)

wlan0     Link encap:Ethernet  HWaddr c8:**:**:**:**:**  
          inet addr:192.168.0.107  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::****:****:****:****/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:9651 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7934 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:6153978 (6.1 MB)  TX bytes:1778823 (1.7 MB)

$ lshw -C network
  *-network               
       description: Wireless interface
       product: Centrino Advanced-N 6235
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       logical name: wlan0
       version: 24
       serial: c8:**:**:**:**:**
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=3.19.0-22-generic firmware=18.168.6.1 ip=192.168.0.107 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
       resources: irq:27 memory:d0400000-d0401fff
  *-network
       description: Ethernet interface
       physical id: 1
       logical name: eth0
       serial: 9c:**:**:**:**:**
       size: 100Mbit/s
       capacity: 100Mbit/s
       capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=asix driverversion=22-Dec-2011 duplex=full firmware=ASIX AX88772 USB 2.0 Ethernet ip=192.168.0.105 link=yes multicast=yes port=MII speed=100Mbit/s

    

Answer 1

Seu adaptador Ethernet parece OK. Mas o problema é que você conectou interfaces com e sem fio ao mesmo tempo. Isso confunde o roteamento.

Se você desativar sua interface sem fio, a rede funcionará bem.