Ubuntu: USB to Ethernet (ASIX AX88772B) stopped working after updates



Question:

After some updates my USB ethernet stopped working. It correctly connects and even some pings pass for a few seconds, but then everything stops. It still works in Windows 8 (I have dual boot) and Ubuntu 14.04 Live USB, but doesn't work in Ubuntu 15.04 Live USB.

Here is relevant part of 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  

Here are uname, lsusb, ifconfig and 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  


Solution:1

Your Ethernet adapter looks OK. But the problem is that you have connected wired and wireless interfaces at the same time. That confuses routing.

If you disable your wireless interface, network should work OK.


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