<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div>Hi David,</div><div><br></div><div>Maybe my kernel is low. I will try to upgrade system with at least 4.5 kernel version. then test again.</div><div><br></div><div>which libqmi version you use?</div><div><br></div><div>Thanks again</div><br><br><br><br><div style="position:relative;zoom:1">--<br><div>
<div style="FONT-SIZE: 14px">
<div align="left"><strong><font color="#0000ff"><em>Best Regards,</em></font></strong></div>
<div><strong><font color="#0000ff"><em>Dai,Lijin</em></font></strong></div></div></div><div style="clear:both"></div></div><div id="divNeteaseMailCard"></div><br><pre><br>At 2016-10-27 06:54:21, "David McCullough" <david.mccullough@accelerated.com> wrote:
>
>Hi dailijin,
>
>We had similar issues and just used the qmi_wwan driver from the latest
>kernel. Its pretty easy to retro fit to older kernels,
>
>Do note however that where I used to get dhcp bearers from the MC7354
>I am now getting static bearers.
>
>Cheers,
>Davidm
>
>Dan Williams wrote the following:
>> On Wed, 2016-10-26 at 16:51 +0800, dailijin wrote:
>> >
>> > Hi All,
>> >
>> >
>> > I am testing MC7455 on Linux based on kernel 3.8, I have patched
>> > usbnet and qmi_wwan driver, the MC7455 modem can get connected.
>> > But can't transmit TCP data. The modem information as below.
>> > ATI
>> > Manufacturer: Sierra Wireless, Incorporated
>> > Model: MC7455
>> > Revision: SWI9X30C_02.05.07.00 r5154 CARMD-EV-FRMWR2 2015/12/04
>> > 22:23:15
>> > MEID: A00000670DEA2A
>> > ESN: 12807659625, 8074E069
>> > IMEI: 359072060229115
>> > IMEI SV: 3
>> > FSN: LQ631307870110
>> > +GCAP: +CGSM
>> > OK
>> >
>> >
>> > Is there anyone encounter this issue?
>>
>> This is likely a raw-ip versus 802-3 issue, the patches for which
>> landed way, way after 3.8. Have you patched the qmi_wwan driver in
>> your kernel with recent improvements, or is it a vanilla 3.8 qmi_wwan?
>>
>> In short: many new QMI devices no longer support "ethernet" mode, but
>> use raw-ip that skips the pointless ethernet framing. There are kernel
>> enhancements required to make that work, and they landed long after
>> 3.8.
>>
>> Dan
>>
>> >
>> > Thanks
>> >
>> >
>> >
>> >
>> > --
>> >
>> > Best Regards,
>> > Dai,Lijin
>> > _______________________________________________
>> > libqmi-devel mailing list
>> > libqmi-devel@lists.freedesktop.org
>> > https://lists.freedesktop.org/mailman/listinfo/libqmi-devel
>> _______________________________________________
>> libqmi-devel mailing list
>> libqmi-devel@lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/libqmi-devel
>
>--
>David McCullough, davidm@spottygum.com, Ph: 0410 560 763
>_______________________________________________
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>https://lists.freedesktop.org/mailman/listinfo/libqmi-devel
</pre></div><br><br><span title="neteasefooter"><p> </p></span>