[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1048755
Title:
0b95:1780 Connection errors with asix driver on Linux 2.6.39+
Status in “linux” package in Ubuntu:
Expired
Bug description:
I upgraded a router from Natty to Precise. This router has 2 "real" network
cards (Intel & Realtek based) and 2 USB-Ethernet adapters (Level1 USB-0201)
that are using the asix driver and has worked flawlessly with Natty.
After the upgrade I noticed erratic connection problems every 5-30 minutes on
one of asix devices and the line "kernel: [133466.272231] asix 1-6:1.0: eth2:
link up, 100Mbps, full-duplex, lpa 0x45E1" was appearing everytime in the
syslog. After some time the same problem also started happening with the second
asix device. The connection basically works, but every once in a while no data
is received anymore for about one minute. The Realtek and Intel network cards
do not show any problems.
lsusb:
Bus 001 Device 002: ID 0b95:1780 ASIX Electronics Corp. AX88178
Bus 001 Device 003: ID 0b95:1780 ASIX Electronics Corp. AX88178
The ouput of "ifconfig" looks like this for the asix devices:
RX packets:371695 errors:19 dropped:140772 overruns:0 frame:2
TX packets:431601 errors:0 dropped:0 overruns:0 carrier:0
Additionally when running tcpdump on the asix devices, every incoming packet
is followed by a line
"19:41:12.355857 6b:f0:34:24:68:ef > 3e:00:c1:ff:00:11, ethertype Unknown
(0xbd58), length 66:".
The *actual* MAC address of this asix device is 00:11:6b:f0:34:24, which are
the last 2 numbers of the receiver and the first 4 numbers of the sender in the
tcpdump output.
I downloaded the drivers from the Asix website
(http://www.asix.com.tw/FrootAttach/driver/AX88772B_772A_760_772_178_LINUX_Driver_v4.4.0_Source.zip),
compiled them and copied the resulting module asix.ko into
/lib/modules/3.2.0-30-generic/kernel/drivers/net/usb/ && depmod -a && modprobe
asix. With this driver the output of "ifconfig" didn't include errors/dropped
anymore and the output of tcpdump looked normal (no unknown ethertype). However
the intermittent connection drops still occured. The driver printed the
following lines into syslog whenever the connection was interrupted:
Sep 10 20:21:05 hostname kernel: [ 2509.259180] eth2: ax88178 - Link status
is: 0
Sep 10 20:21:07 hostname kernel: [ 2511.051420] eth2: kevent 4 scheduled
Sep 10 20:21:07 hostname kernel: [ 2511.051428] eth2: ax88178 - Link status
is: 1
The following kernel versions showed no or hardly any errors in the output of
"ifconfig" and "tcpdump" and the connection was stable:
Latest Natty kernel 2.6.38-15.66 amd64
The following kernel versions showed no or hardly any errors in the output of
"ifconfig" and "tcpdump", however intermittent connection drops happened as
explained above:
Kernel 2.6.39
(http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.39.4-oneiric/linux-image-2.6.39-02063904-generic_2.6.39-02063904.201108040905_amd64.deb)
Latest Oneiric kernel 3.0.0-25.41
Kernel 3.1.10
(http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.1.10-precise/linux-image-3.1.10-030110-generic_3.1.10-030110.201201181135_amd64.deb)
The following kernel versions showed a lot of dropped packets in the output
of "ifconfig", tcpdump displays "unknown ethertype" on all incoming packets and
the connection was unstable:
Latest Precise kernel 3.2.0-30.48
Mainline kernel 3.6rc5
(http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.6-rc5-quantal/linux-image-3.6.0-030600rc5-generic_3.6.0-030600rc5.201209082035_amd64.deb)
As an additional note there is only PPPoE traffic flowing over the
asix devices.
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