Sierra Wireless EM7345 4G LTE (MBIM) not working
bjorn at mork.no
Mon Jun 16 23:31:32 PDT 2014
Harald Jung <jung at ecos.de> writes:
> Problem: Sierra Wireless EM7345 4G LTE (MBIM) not working
I've got one of those as well, and it works fine. But only with MBIM.
> here are the infos that I've collected:
> Kernel: 3.14.3
> Module cdc-ncm
> Networkmanager: 0.9.8.10
> Modemmanager: 1.2.0
> Jun 3 14:39:16 Ecos-Appliance kernel: cdc_ncm 3-10:1.0: MAC-Address:
This is the first problem with NCM: The MAC-Address announced by the
firmware is not valid. Easily fixed of course, but still an indication
that they don't really care about NCM.
> CDC NCM:
> bcdNcmVersion 1.00
> bmNetworkCapabilities 0x00
> CDC Ethernet:
> iMacAddress 6 FFFFFFFFFFFF
> bmEthernetStatistics 0x00000000
> wMaxSegmentSize 1514
> wNumberMCFilters 0x0000
> bNumberPowerFilters 0
As you can see in these descriptors: It looks like a "placeholder" where
Sierra has failed to fill in valid content.
The last hint is the fact that Lenovo (where I assume you got this
modem?) only provides an MBIM driver for the older Windows versions
without builtin MBIM support.
So: Use MBIM with this modem. It's currently the only supported mode.
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