Nokia C7: bluetooth DUN funguje jen poprvé (vyřešeno)

Mám Nokii C7, kde se se zapnutým Bluetooth připojím s notebookem k webu přes NetworkManager (Ubuntu 11.10). Další spojení se však nedokáže navázat:

Dec 28 21:28:16 falx NetworkManager[1031]: <info> Activation (94:20:53:D9:C8:C8) starting connection 'Vodafone Predefinito'
Dec 28 21:28:16 falx NetworkManager[1031]: <info> (94:20:53:D9:C8:C8): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Dec 28 21:28:16 falx NetworkManager[1031]: <info> Activation (94:20:53:D9:C8:C8) Stage 1 of 5 (Device Prepare) scheduled...
Dec 28 21:28:16 falx NetworkManager[1031]: <info> Activation (94:20:53:D9:C8:C8) Stage 1 of 5 (Device Prepare) started...
Dec 28 21:28:16 falx NetworkManager[1031]: <info> Activation (94:20:53:D9:C8:C8) Stage 2 of 5 (Device Configure) scheduled...
Dec 28 21:28:16 falx NetworkManager[1031]: <info> Activation (94:20:53:D9:C8:C8) Stage 1 of 5 (Device Prepare) complete.
Dec 28 21:28:16 falx NetworkManager[1031]: <info> Activation (94:20:53:D9:C8:C8) Stage 2 of 5 (Device Configure) starting...
Dec 28 21:28:16 falx NetworkManager[1031]: <info> (94:20:53:D9:C8:C8): device state change: prepare -> config (reason 'none') [40 50 0]
Dec 28 21:28:16 falx NetworkManager[1031]: <info> Activation (94:20:53:D9:C8:C8) Stage 2 of 5 (Device Configure) complete.
Dec 28 21:28:20 falx NetworkManager[1031]: <info> Activation (94:20:53:D9:C8:C8 94:20:53:D9:C8:C8/bluetooth) Stage 2 of 5 (Device Configure) successful.  Will connect via DUN.
Dec 28 21:28:20 falx NetworkManager[1031]: <info> Activation (94:20:53:D9:C8:C8/bluetooth) Stage 2 of 5 (Device Configure) waiting for modem to appear.
Dec 28 21:28:20 falx modem-manager[998]: <info>  (rfcomm0) opening serial port...
Dec 28 21:28:20 falx kernel: [23928.016873] rfcomm_tty_ioctl: TIOCGSERIAL is not supported
Dec 28 21:28:21 falx modem-manager[998]: <info>  (rfcomm0) closing serial port...
Dec 28 21:28:21 falx modem-manager[998]: <info>  (rfcomm0) serial port closed
Dec 28 21:28:21 falx modem-manager[998]: <info>  (rfcomm0) opening serial port...
Dec 28 21:28:21 falx modem-manager[998]: <info>  (Generic): GSM modem /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.4 claimed port rfcomm0
Dec 28 21:28:21 falx kernel: [23928.827280] rfcomm_tty_ioctl: TIOCGSERIAL is not supported
Dec 28 21:28:21 falx modem-manager[998]: <info>  (rfcomm0) closing serial port...
Dec 28 21:28:21 falx modem-manager[998]: <info>  (rfcomm0) serial port closed
Dec 28 21:28:21 falx NetworkManager[1031]: <info> Activation (94:20:53:D9:C8:C8/bluetooth) Stage 2 of 5 (Device Configure) modem found.
Dec 28 21:28:21 falx modem-manager[998]: <info>  (rfcomm0) opening serial port...
Dec 28 21:28:21 falx modem-manager[998]: <info>  Modem /org/freedesktop/ModemManager/Modems/5: state changed (disabled -> enabling)
Dec 28 21:28:21 falx kernel: [23929.158953] rfcomm_tty_ioctl: TIOCGSERIAL is not supported
Dec 28 21:28:22 falx modem-manager[998]: <info>  Modem /org/freedesktop/ModemManager/Modems/5: state changed (enabling -> enabled)
Dec 28 21:28:22 falx modem-manager[998]: <info>  Modem /org/freedesktop/ModemManager/Modems/5: state changed (enabled -> registered)
Dec 28 21:28:22 falx NetworkManager[1031]: <warn> GSM connection failed: (32) Unknown registration status response
Dec 28 21:28:22 falx NetworkManager[1031]: <info> (94:20:53:D9:C8:C8): device state change: config -> failed (reason 'unknown') [50 120 1]
Dec 28 21:28:22 falx NetworkManager[1031]: <info> Marking connection 'Vodafone Predefinito' invalid.
Dec 28 21:28:22 falx NetworkManager[1031]: <warn> Activation (94:20:53:D9:C8:C8) failed.
Dec 28 21:28:22 falx NetworkManager[1031]: <info> (94:20:53:D9:C8:C8): device state change: failed -> disconnected (reason 'none') [120 30 0]
Dec 28 21:28:22 falx NetworkManager[1031]: <info> (94:20:53:D9:C8:C8): deactivating device (reason 'none') [0]
Dec 28 21:28:22 falx NetworkManager[1031]: nm_system_iface_flush_routes: assertion `ifindex > 0' failed
Dec 28 21:28:22 falx NetworkManager[1031]: nm_system_iface_flush_addresses: assertion `ifindex > 0' failed
Dec 28 21:28:22 falx modem-manager[998]: <info>  (rfcomm0) closing serial port...
Dec 28 21:28:22 falx modem-manager[998]: <info>  (rfcomm0) serial port closed
Dec 28 21:28:22 falx modem-manager[998]: <info>  (tty/rfcomm0): released by modem /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.4
Dec 28 21:28:22 falx modem-manager[998]: <info>  Modem /org/freedesktop/ModemManager/Modems/5: state changed (registered -> disabled)
Dec 28 21:28:22 falx modem-manager[998]: mm_generic_gsm_update_signal_quality: assertion `self != NULL' failed

Po restartu telefonu jde vše normálně. Tento problém mám nejen u Vodafone v ČR, ale taky u Orange v Rakousku. S jiným telefonem mi DUN fungoval bezproblémově.

Položil jsem tento dotaz už na askubuntu.com, bez odpovědi. Ani google mi nic neporadil.

Dokázal by někdo poradit, jak blíže zjistit, co se děje, nebo přímo určit příčinu?

Díky.

Dotaz: Nokia C7: bluetooth DUN funguje jen poprvé

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