There are two problems in modem-manager (0.3-0ubuntu2, Ubuntu v10.04).
1) If the carrier signal is lost, i.e. there is a spot with no GSM/UMTS signal, modem-manager doesn't remove itself from memory and doesn't accept a new connection before it is removed.
gksu "killall -TERM modem-manager"
After that network-manager is able to connect again.
2) My "Huawei Technologies Co., Ltd. E620 USB Modem" requires the "+CFUN=1" command (reboot software) every time it is used to ensure a proper function. In my local debug copy I had put the command in "src/mm-generic-gsm.c"'s "init_done"-function before the rest of the initiation.
Conclusion: If I kill modem-manager when the not working and put "+CFUN=1" in its initiation, modem-manager is working as expected.
Is it possible for modem-manager to send a term-signal to itself when the carrier is lost? Then we would have a much better working modem-manager and you don't require reboot on network failure.
Binary package hint: modemmanager
There are two problems in modem-manager (0.3-0ubuntu2, Ubuntu v10.04).
1) If the carrier signal is lost, i.e. there is a spot with no GSM/UMTS signal, modem-manager doesn't remove itself from memory and doesn't accept a new connection before it is removed.
gksu "killall -TERM modem-manager"
After that network-manager is able to connect again.
2) My "Huawei Technologies Co., Ltd. E620 USB Modem" requires the "+CFUN=1" command (reboot software) every time it is used to ensure a proper function. In my local debug copy I had put the command in "src/mm- generic- gsm.c"' s "init_done" -function before the rest of the initiation.
mm_serial_ port_queue_ command (port, "+CFUN=1", 10, NULL, NULL);
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Conclusion: If I kill modem-manager when the not working and put "+CFUN=1" in its initiation, modem-manager is working as expected.
Is it possible for modem-manager to send a term-signal to itself when the carrier is lost? Then we would have a much better working modem-manager and you don't require reboot on network failure.