Re: HuaWei E1750 can't work on ubuntu9.04

[Dan Williams <dcbw redhat com>]

On Sat, 2010-02-20 at 18:22 +0800, 代尔欣 wrote:
> Hi all,
>        I have a HuaWei E1750 usb modem. After install usb-modeswitch
> on ubuntu9.04, NM can find the modem. But I can't connect through NM.
> From the log, the AT command part is ok. PPP is failed. Below is the
> log:
> 
> Starting pppd connection
> <debug> [1266659846.424260] nm_ppp_manager_start(): Command
> line: /usr/sbin/pppd nodetach lock nodefaultroute ttyUSB0 noipdefault
> noauth usepeerdns lcp-echo-failure 0 lcp-echo-interval 0
> ipparam /org/freedesktop/NetworkManager/PPP/2
> plugin /usr/lib/pppd/2.4.4/nm-pppd-plugin.so
> NetworkManager: <debug> [1266659846.434225] nm_ppp_manager_start():
> ppp started with pid 9348
> NetworkManager: <info>  Activation (ttyUSB0) Stage 2 of 5 (Device
> Configure) complete.
> NetworkManager: <WARN>  pppd_timed_out(): Looks like pppd didn't
> initialize our dbus module
> NetworkManager: <info>  (ttyUSB0): device state change: 5 -> 9
> NetworkManager: <debug> [1266659862.012800] nm_serial_device_close():
> Closing device 'ttyUSB0'
> 
> check the /usr/lib/pppd folder, I found 2 folders, 2.4.4 and 2.4.5.
> The nm-pppd-plugin.so md5 is same in both folders. pppd version is
> 2.4.5 in ubuntu9.04. But NM use /usr/lib/pppd/2.4.4/nm-pppd-plugin.so.
> It seems this is why the connection fail. Any quick solution to
> resolve this except recomplie the NM codes?

By default NM will place build the plugin for ppp 2.4.4.  It's up to the
user/distribution to make sure that they build NM with
--with-ppp-plugin-dir=/path/to/your/pppdir to make sure that it's in the
right place.  So this is more of a distribution issue.

Has NetworkManager been modified on that machine at all?  I'm 100%
certain that a stock Ubuntu 9.04 with NetworkManager install works
correctly.

Dan

> The pppd is ok, I can connect with below commands without NM:
> 
> pppd ttyUSB0 nodetach defaultroute noipdefault lock usepeerdns connect
> 'chat "" "at" "" "at" "OK" "at&f" "OK" "atz" "OK" "at
> +cgdcont=1,'IP','3gnet'" OK "atdt*99***1#" CONNECT' user gprs
> 
> Thanks!
> DEX
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