Problems with several modems after upgrade to ModemManager-1

[Harald Jung]

Hi,

Am 22.11.2013 15:46, schrieb Aleksander Morgado:
> Vendor=12d1 ProdID=1001
> S:  Manufacturer=HUAWEI Technology
> S:  Product=HUAWEI Mobile
>
> I can see the access tech changing a lot umts->gprs->unknown->umts... is
> there good coverage? if there is an antenna, is it connected?
>
> If you test this same exact setup with MM 0.6.x it ends up registered?
>

Maybe there is a problem with the antenna, I will make shure that there 
is no physical problem before going on.

>> ############################
>> Modem 0bdb:1926 doesn't find a valid data port
>>
>> P:  Vendor=0bdb ProdID=1926 Rev=00.00
>> S:  Manufacturer=Lenovo
>> S:  Product=H5321 gw
>
> Wait, you didn't compile ModemManager with MBIM support, did you? MM is
> explicitly ignoring the MBIM ports, and that can only happen if it
> wasn't compiled with libmbim-glib support. You can get libmbim here:
>
> http://www.freedesktop.org/wiki/Software/libmbim/
I haven't used libmbim because it isn't in our gentoo build tree, but 
after some tests with a manully build libmbim I ran into other problems.
In the end the problem was triggered by the kernel config.
Removing CDC_MBIM from the kernel did the job.
To make shure that mbim isn't used at all, I made some entries in the 
modprobe.conf

blacklist cdc_mbim
options cdc_ncm prefer_mbim=N

>> ############################
>> These modems crash when the lock facility MM_MODEM_3GPP_FACILITY_PH_SIM
>> is requested:
>>
> Sigh... I wonder if we should just fully skip PH_SIM always.
>

Do you think it could cause problems with other modems?

Harald