I can confirm a similar situation here when using Networkmanager and modemmanager as suplplied by ubuntu maverick repos. Last version that worked for me was modemmanager 0.3.0 in lucid. My data is:
Linux xikitin 2.6.35-24-generic #42-Ubuntu SMP Thu Dec 2 01:41:57 UTC 2010 i686 GNU/Linux modemmanager: Instalados: 0.4+git.20101208t230459.592d71f-0ubuntu1~nmt1~maverick Candidato: 0.4+git.20101208t230459.592d71f-0ubuntu1~nmt1~maverick Tabla de versión: *** 0.4+git.20101208t230459.592d71f-0ubuntu1~nmt1~maverick 0 500 http://ppa.launchpad.net/network-manager/trunk/ubuntu/ maverick/main i386 Packages 100 /var/lib/dpkg/status 0.4+git.20100809t153145.be28089-0ubuntu1 0 500 http://archive.ubuntu.com/ubuntu/ maverick/main i386 Packages 500 http://es.archive.ubuntu.com/ubuntu/ maverick/main i386 Packages Both 0.4 versions show the same behavior. network-manager: Instalados: 0.8.1+git.20101019t162207.0a43b45-0ubuntu1~nmt1~mtrudel1 Candidato: 0.8.1+git.20101019t162207.0a43b45-0ubuntu1~nmt1~mtrudel1 Tabla de versión: *** 0.8.1+git.20101019t162207.0a43b45-0ubuntu1~nmt1~mtrudel1 0 500 http://ppa.launchpad.net/network-manager/trunk/ubuntu/ maverick/main i386 Packages 100 /var/lib/dpkg/status 0.8.1+git.20100810t184654.ab580f4-0ubuntu2 0 500 http://archive.ubuntu.com/ubuntu/ maverick/main i386 Packages 500 http://es.archive.ubuntu.com/ubuntu/ maverick/main i386 Packages The daemon.log lines affecting this behavior are: Dec 15 01:45:22 xikitin NetworkManager[1063]: <info> Activation (ttyUSB0) starting connection 'Movistar' Dec 15 01:45:22 xikitin NetworkManager[1063]: <info> (ttyUSB0): device state change: 3 -> 4 (reason 0) Dec 15 01:45:22 xikitin NetworkManager[1063]: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled... Dec 15 01:45:22 xikitin NetworkManager[1063]: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) started... Dec 15 01:45:22 xikitin NetworkManager[1063]: <info> (ttyUSB0): device state change: 4 -> 6 (reason 0) Dec 15 01:45:22 xikitin NetworkManager[1063]: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) complete. Dec 15 01:45:22 xikitin NetworkManager[1063]: Tried to set deprecated property gsm/puk Dec 15 01:45:22 xikitin NetworkManager[1063]: Tried to set deprecated property gsm/puk Dec 15 01:45:22 xikitin NetworkManager[1063]: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled... Dec 15 01:45:22 xikitin NetworkManager[1063]: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) started... Dec 15 01:45:22 xikitin NetworkManager[1063]: <info> (ttyUSB0): device state change: 6 -> 4 (reason 0) Dec 15 01:45:22 xikitin NetworkManager[1063]: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) complete. Dec 15 01:45:22 xikitin NetworkManager[1063]: <warn> GSM modem enable failed: (32) SIM PIN required Dec 15 01:45:22 xikitin modem-manager: (ttyUSB0) opening serial device... Dec 15 01:45:22 xikitin modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: unlock no longer required Dec 15 01:45:22 xikitin modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: # unlock retries for (null) is 0 Dec 15 01:45:22 xikitin modem-manager: (ttyUSB0) closing serial device... Dec 15 01:45:22 xikitin modem-manager: (ttyUSB0) opening serial device... Dec 15 01:45:22 xikitin modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (disabled -> enabling) Dec 15 01:45:24 xikitin modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (enabling -> enabled) Dec 15 01:45:24 xikitin modem-manager: CS registration state changed: 2 Dec 15 01:45:24 xikitin modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (enabled -> searching) Dec 15 01:45:24 xikitin modem-manager: PS registration state changed: 2 Dec 15 01:45:26 xikitin modem-manager: (ttyUSB0) closing serial device... Dec 15 01:45:26 xikitin NetworkManager[1063]: <warn> GSM connection failed: (32) Serial port is now closed Dec 15 01:45:26 xikitin NetworkManager[1063]: <info> (ttyUSB0): device state change: 4 -> 9 (reason 1) Dec 15 01:45:26 xikitin NetworkManager[1063]: <info> Marking connection 'Movistar' invalid. Dec 15 01:45:26 xikitin NetworkManager[1063]: <warn> Activation (ttyUSB0) failed. Dec 15 01:45:26 xikitin NetworkManager[1063]: <info> (ttyUSB0): device state change: 9 -> 3 (reason 0) Dec 15 01:45:26 xikitin NetworkManager[1063]: <info> (ttyUSB0): deactivating device (reason: 0). Dec 15 01:45:26 xikitin modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (searching -> disabled) Dec 15 01:45:26 xikitin modem-manager: Removed modem /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-2 After this the modem dissapears and must be plugged again to reapear in networkmanager list of connections. The connection never succeeds. I traced down the issue to some SIM exchange issue (see above about bad SIM exchange). If you use your SIM card in a phone, you can disable SIM security and then the connection suceeds. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/689894 Title: Huawei modem disappears / reappears when trying to connect -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs