I think the RedHat bug (517442) may not be related to this bug at all. This bug was not specific to the E620. In fact, it appeared to be a general issue affecting users of any GSM modem.
Most people commented here or marked "this bug affects me" only to avoid reporting duplicate bugs. For instance, I had this issue with Huawei E156B and with a ZTE modem I forgot the model. People reported having this problem with modems from other manufacturers (like Samsung and Pantech) in previous comments. Unfortunatelly, I don't use those modems anymore, so I can't test if the issue was solved in recent releases. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/566812 Title: USB Modem wont connect after modem hangup -- Huawei E620 Status in ModemManager (with NetworkManager support): Incomplete Status in “network-manager” package in Ubuntu: Invalid Status in “network-manager” package in Fedora: Unknown Bug description: Binary package hint: network-manager Running my Huawei USB modem (Bus 002 Device 007: ID 12d1:1001 Huawei Technologies Co., Ltd. E620 USB Modem) in Lucid Beta 2 amd64 (uname -a = Linux laptop-hostname 2.6.32-19-generic #28-Ubuntu SMP Thu Apr 1 10:39:41 UTC 2010 x86_64 GNU/Linux) and, after the same usb_modeswitch used in Intrepid, connection is fine. If signal is lost causing modem hangup, reconnection is not possible without unplugging modem, replugging, usb_modeswitch and then reconnect. Logs: Apr 19 18:03:42 laptop-hostname pppd[1751]: Sent 91110 bytes, received 298361 bytes. Apr 19 18:03:42 laptop-hostname pppd[1751]: Modem hangup Apr 19 18:03:42 laptop-hostname pppd[1751]: Connection terminated. Apr 19 18:03:42 laptop-hostname NetworkManager: <info> (ttyUSB0): device state change: 8 -> 9 (reason 13) Apr 19 18:03:42 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) failed. Apr 19 18:03:42 laptop-hostname NetworkManager: <info> (ttyUSB0): device state change: 9 -> 3 (reason 0) Apr 19 18:03:42 laptop-hostname NetworkManager: <info> (ttyUSB0): deactivating device (reason: 0). Apr 19 18:03:42 laptop-hostname modem-manager: (ttyUSB0) closing serial device... Apr 19 18:03:42 laptop-hostname modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (connected -> disconnecting) Apr 19 18:03:42 laptop-hostname modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (disconnecting -> connected) Apr 19 18:03:42 laptop-hostname NetworkManager: SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0) Apr 19 18:03:44 laptop-hostname NetworkManager: <debug> [1271696624.001843] ensure_killed(): waiting for ppp pid 1751 to exit Apr 19 18:03:44 laptop-hostname NetworkManager: <debug> [1271696624.003285] ensure_killed(): ppp pid 1751 cleaned up Apr 19 18:04:19 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) starting connection '3 Internet' Apr 19 18:04:19 laptop-hostname NetworkManager: <info> (ttyUSB0): device state change: 3 -> 4 (reason 0) Apr 19 18:04:19 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled... Apr 19 18:04:19 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) started... Apr 19 18:04:19 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) complete. Apr 19 18:04:19 laptop-hostname NetworkManager: <WARN> stage1_prepare_done(): GSM modem connection failed: (32) Sending command failed: device is not enabled Apr 19 18:04:19 laptop-hostname NetworkManager: <info> (ttyUSB0): device state change: 4 -> 9 (reason 1) Apr 19 18:04:19 laptop-hostname NetworkManager: <info> Marking connection '3 Internet' invalid. Apr 19 18:04:19 laptop-hostname modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (connected -> disconnecting) Apr 19 18:04:19 laptop-hostname modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (disconnecting -> connected) Apr 19 18:04:19 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) failed. Apr 19 18:04:19 laptop-hostname NetworkManager: <info> (ttyUSB0): device state change: 9 -> 3 (reason 0) Apr 19 18:04:19 laptop-hostname NetworkManager: <info> (ttyUSB0): deactivating device (reason: 0). Apr 19 18:04:31 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) starting connection '3 Internet' Apr 19 18:04:31 laptop-hostname NetworkManager: <info> (ttyUSB0): device state change: 3 -> 4 (reason 0) Apr 19 18:04:31 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled... Apr 19 18:04:31 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) started... Apr 19 18:04:31 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) complete. Apr 19 18:04:31 laptop-hostname NetworkManager: <WARN> stage1_prepare_done(): GSM modem connection failed: (32) Sending command failed: device is not enabled Apr 19 18:04:31 laptop-hostname NetworkManager: <info> (ttyUSB0): device state change: 4 -> 9 (reason 1) Apr 19 18:04:31 laptop-hostname NetworkManager: <info> Marking connection '3 Internet' invalid. Apr 19 18:04:31 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) failed. Apr 19 18:04:31 laptop-hostname NetworkManager: <info> (ttyUSB0): device state change: 9 -> 3 (reason 0) Apr 19 18:04:31 laptop-hostname NetworkManager: <info> (ttyUSB0): deactivating device (reason: 0). Apr 19 18:04:31 laptop-hostname modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (connected -> disconnecting) Apr 19 18:04:31 laptop-hostname modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (disconnecting -> connected) Apr 19 18:04:44 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) starting connection '3 Internet' Apr 19 18:04:44 laptop-hostname NetworkManager: <info> (ttyUSB0): device state change: 3 -> 4 (reason 0) Apr 19 18:04:44 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled... Apr 19 18:04:44 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) started... Apr 19 18:04:44 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) complete. Apr 19 18:04:44 laptop-hostname NetworkManager: <WARN> stage1_prepare_done(): GSM modem connection failed: (32) Sending command failed: device is not enabled Apr 19 18:04:44 laptop-hostname NetworkManager: <info> (ttyUSB0): device state change: 4 -> 9 (reason 1) Apr 19 18:04:44 laptop-hostname NetworkManager: <info> Marking connection '3 Internet' invalid. Apr 19 18:04:44 laptop-hostname modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (connected -> disconnecting) Apr 19 18:04:44 laptop-hostname modem-manager: Modem /org/freedesktop/ModemManager/Modems/0: state changed (disconnecting -> connected) Apr 19 18:04:44 laptop-hostname NetworkManager: <info> Activation (ttyUSB0) failed. Apr 19 18:04:44 laptop-hostname NetworkManager: <info> (ttyUSB0): device state change: 9 -> 3 (reason 0) Apr 19 18:04:44 laptop-hostname NetworkManager: <info> (ttyUSB0): deactivating device (reason: 0). To manage notifications about this bug go to: https://bugs.launchpad.net/modemmanager/+bug/566812/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp