Continues drops on 3G

[Jonathan Petersson <jpetersson garnser se>]

Hi all,

Throughout the last 24 hours I've started getting quite frequent drops
on my 3G connection, talking to the provider they don't have any known
issues.

Here's the logs from network-manager and modem-manager:
Jan 31 23:40:10 jpetersson2-desktop NetworkManager: <info>  (ppp0):
writing resolv.conf to /sbin/resolvconf
Jan 31 23:40:10 jpetersson2-desktop NetworkManager: <info>  (ttyUSB2):
device state change: 7 -> 8 (reason 0)
Jan 31 23:40:10 jpetersson2-desktop NetworkManager: <info>  (ppp0):
writing resolv.conf to /sbin/resolvconf
Jan 31 23:40:10 jpetersson2-desktop NetworkManager: <info>  Policy set
'Telenor Mobilt bredband 1' (ppp0) as default for routing and DNS.
Jan 31 23:40:10 jpetersson2-desktop NetworkManager: <info>  Activation
(ttyUSB2) successful, device activated.
Jan 31 23:40:10 jpetersson2-desktop NetworkManager: <info>  Activation
(ttyUSB2) Stage 5 of 5 (IP Configure Commit) complete.
Jan 31 23:40:10 jpetersson2-desktop nm-dispatcher.action: Tried to set
deprecated property gsm/band
Jan 31 23:40:10 jpetersson2-desktop NetworkManager: Tried to set
deprecated property gsm/band
Jan 31 23:40:10 jpetersson2-desktop NetworkManager: Tried to set
deprecated property gsm/band
Jan 31 23:41:42 jpetersson2-desktop modem-manager: Removed modem
/sys/devices/pci0000:00/0000:00:1d.7/usb1/1-5
Jan 31 23:41:42 jpetersson2-desktop modem-manager: (ttyUSB2) closing
serial device...
Jan 31 23:41:42 jpetersson2-desktop NetworkManager: <info>  (ttyUSB2):
now unmanaged
Jan 31 23:41:42 jpetersson2-desktop NetworkManager: <info>  (ttyUSB2):
device state change: 8 -> 1 (reason 36)
Jan 31 23:41:42 jpetersson2-desktop NetworkManager: <info>  (ttyUSB2):
deactivating device (reason: 36).
Jan 31 23:41:42 jpetersson2-desktop NetworkManager: <info>  (ppp0):
removing resolv.conf from /sbin/resolvconf
Jan 31 23:41:42 jpetersson2-desktop NetworkManager: <info>  (ttyUSB2):
cleaning up...
Jan 31 23:41:42 jpetersson2-desktop NetworkManager: <info>  (ttyUSB2):
taking down device.
Jan 31 23:41:42 jpetersson2-desktop NetworkManager:
SCPlugin-Ifupdown: devices removed (path:
/sys/devices/virtual/net/ppp0, iface: ppp0)
Jan 31 23:41:42 jpetersson2-desktop nm-dispatcher.action: Tried to set
deprecated property gsm/band
Jan 31 23:41:42 jpetersson2-desktop nm-dispatcher.action: Error in
get_property: Method "Get" with signature "ss" on interface
"org.freedesktop.DBus.Properties" doesn't exist#012
Jan 31 23:41:42 jpetersson2-desktop modem-manager: (Huawei): (ttyUSB0)
deferring support check
Jan 31 23:41:42 jpetersson2-desktop modem-manager: (ttyUSB2) opening
serial device...
Jan 31 23:41:42 jpetersson2-desktop modem-manager: (ttyUSB2): probe
requested by plugin 'Huawei'
Jan 31 23:41:42 jpetersson2-desktop modem-manager: (Huawei): (ttyUSB1)
deferring support check
Jan 31 23:41:44 jpetersson2-desktop NetworkManager: <debug>
[1264977704.002147] ensure_killed(): waiting for ppp pid 4706 to exit
Jan 31 23:41:44 jpetersson2-desktop NetworkManager: <debug>
[1264977704.002313] ensure_killed(): ppp pid 4706 cleaned up
Jan 31 23:41:44 jpetersson2-desktop modem-manager: Got failure code 3:
No carrier
Jan 31 23:41:45 jpetersson2-desktop modem-manager: (ttyUSB2) closing
serial device...
Jan 31 23:41:45 jpetersson2-desktop modem-manager: (Huawei): GSM modem
/sys/devices/pci0000:00/0000:00:1d.7/usb1/1-5 claimed port ttyUSB2
Jan 31 23:41:45 jpetersson2-desktop modem-manager: Added modem
/sys/devices/pci0000:00/0000:00:1d.7/usb1/1-5
Jan 31 23:41:45 jpetersson2-desktop modem-manager: Exported modem
/sys/devices/pci0000:00/0000:00:1d.7/usb1/1-5 as
/org/freedesktop/ModemManager/Modems/5
Jan 31 23:41:45 jpetersson2-desktop NetworkManager: <info>  (ttyUSB2):
new GSM device (driver: 'option1')
Jan 31 23:41:45 jpetersson2-desktop NetworkManager: <info>  (ttyUSB2):
exported as /org/freedesktop/NetworkManager/Devices/6
Jan 31 23:41:45 jpetersson2-desktop NetworkManager: <info>  (ttyUSB2):
now managed
Jan 31 23:41:45 jpetersson2-desktop NetworkManager: <info>  (ttyUSB2):
device state change: 1 -> 2 (reason 2)
Jan 31 23:41:45 jpetersson2-desktop NetworkManager: <info>  (ttyUSB2):
deactivating device (reason: 2).
Jan 31 23:41:45 jpetersson2-desktop NetworkManager: flush_routes:
assertion `iface_idx >= 0' failed
Jan 31 23:41:45 jpetersson2-desktop NetworkManager: flush_addresses:
assertion `iface_idx >= 0' failed
Jan 31 23:41:45 jpetersson2-desktop NetworkManager: <info>  (ttyUSB2):
device state change: 2 -> 3 (reason 0)
Jan 31 23:41:45 jpetersson2-desktop modem-manager: (ttyUSB0):
re-checking support...
Jan 31 23:41:45 jpetersson2-desktop modem-manager: (ttyUSB0) opening
serial device...
Jan 31 23:41:45 jpetersson2-desktop modem-manager: (ttyUSB0) closing
serial device...
Jan 31 23:41:45 jpetersson2-desktop modem-manager: (Huawei): GSM modem
/sys/devices/pci0000:00/0000:00:1d.7/usb1/1-5 claimed port ttyUSB0
Jan 31 23:41:45 jpetersson2-desktop modem-manager: (ttyUSB1):
re-checking support...
Jan 31 23:41:45 jpetersson2-desktop modem-manager: (ttyUSB1) opening
serial device...
Jan 31 23:41:50 jpetersson2-desktop modem-manager: (ttyUSB1) closing
serial device...
Jan 31 23:41:50 jpetersson2-desktop modem-manager: (ttyUSB1) opening
serial device...
Jan 31 23:41:50 jpetersson2-desktop modem-manager: (ttyUSB1): probe
requested by plugin 'Generic'
Jan 31 23:42:01 jpetersson2-desktop modem-manager: (ttyUSB1) closing
serial device...

Please advice on cause and fix.

Thanks

/Jonathan