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Description of problem: I've been seeing this happen quite a lot recently (F14 had similar behaviour as well). My home has pockets where the 3G or 2G signal isn't very good, and just shifting the laptop around can cause the signal to drop. Earlier, NetworkManager used to go from HSDPA to Edge / GPRS / GSM and back, but recently the device / connection just disappears from NetworkManager's list of available devices. I have to plug out the 3G USB dongle and plug it back in to use it again. I'm not sure if this is a NM or MM bug; please update if not NM. Also, let me know which debug logs could be helpful.
Please, follow steps in "Debugging NetworkManager 0.8.x 3G connections" section on http://live.gnome.org/NetworkManager/Debugging. Attach both NM and M logs here. Thanks. Also, do you see any errors in dmesg regarding your dongle? What kernel version do you have?
Created attachment 510619 [details] ModemManager log
Created attachment 510620 [details] NetworkManager log The last few lines from the NM log when the device disappears: rcvd [LCP TermReq id=0x3] LCP terminated by peer ** Message: nm-ppp-plugin: (nm_phasechange): status 8 / phase 'network' Connect time 7.8 minutes. Sent 357372 bytes, received 4916519 bytes. Script /etc/ppp/ip-down started (pid 22613) ** Message: nm-ppp-plugin: (nm_phasechange): status 5 / phase 'establish' sent [LCP TermAck id=0x3] Modem hangup ** Message: nm-ppp-plugin: (nm_phasechange): status 11 / phase 'disconnect' Connection terminated. NetworkManager[22168]: <info> (ttyUSB3): device state change: activated -> failed (reason 'ppp-disconnect') [100 120 13] ** Message: Terminated openvpn daemon with PID 22415. NetworkManager[22168]: <info> DNS: starting dnsmasq... NetworkManager[22168]: <error> [1309425423.627157] [nm-system.c:318] sync_addresses(): (ppp0): error -19 returned from rtnl_addr_add(): Netlink Error (errno = No such device) ** Message: nm-ppp-plugin: (nm_phasechange): status 1 / phase 'dead' Script /etc/ppp/ip-down finished (pid 22613), status = 0x0 ** Message: nm-ppp-plugin: (nm_exit_notify): cleaning up NetworkManager[22168]: nm_system_device_set_priority: assertion `info.iface >= 0' failed NetworkManager[22168]: <warn> Activation (ttyUSB3) failed. NetworkManager[22168]: <info> (ttyUSB3): now unmanaged NetworkManager[22168]: <info> (ttyUSB3): device state change: failed -> unmanaged (reason 'removed') [120 10 36] NetworkManager[22168]: <info> (ttyUSB3): deactivating device (reason: 36). NetworkManager[22168]: <warn> could not read ppp stats: No such device
I'm running 2.6.39-1.fc16.x86_64 This happened with 2.6.38 as well. Nothing relevant in kernel logs.
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