My Huawei E1820 works fine with ModemManager in PPP mode.
I tried to get it to work with NDISDUP. I added the following lines to
plugins/huawei/77-mm-huawei-net-port-types.rules:
# Huawei E1820 firmware 11.831.03.00.00
SUBSYSTEMS=="usb", ATTRS{bInterfaceClass}=="02",
ATTRS{bInterfaceSubClass}=="06",ATTRS{bInterfaceProtocol}=="ff",
ENV{ID_MM_HUAWEI_NDISDUP_SUPPORTED}="1"
ModemManager was then able to connect using the AT^NDISDUP command.
I received an IP address and DNS settings, but I didn't seem to be getting any
traffic over the connection.
I noticed the following line in the output of dmesg:
[13317.359566] cdc_ether 2-5:1.1 wwan0: CDC: unexpected notification 01!
I searched for this error and came across the following post:
http://linux.derkeiler.com/Newsgroups/comp.os.linux.hardware/2011-09/msg00042.html
Sure enough, changing the MAC address of wwan0 to 00:01:02:03:04:05 solved the
problem!
I am using an Ubuntu 3.8 kernel. The modem works fine with AT^NDISDUP in
Windows.
Is this a problem with the cdc_ether driver, or something that could be fixed
in ModemManager?
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