Ubuntu
modemmanager package

  1. Bug #1060831
  2. Comment #0

Comment 0 for bug 1060831

Revision history for this message
Marius B. Kotsbak (mariusko) wrote : Sierra LTE modem gives no signal quality in LTE mode (only in 3G/2G mode)

In LTE mode, the sierra modem (MC7710) gives no indication of signal quality in nm-applet. It looks like icon "gsm-3g-none.svg". I suspect this is caused by this in the modemmanager debug log when connected:

modem-manager[25672]: <debug> [1349256755.558392] [mm-at-serial-port.c:334] debug_log(): (ttyUSB3): --> 'AT*CNTI=0<CR>'
modem-manager[25672]: <debug> [1349256755.579056] [mm-at-serial-port.c:334] debug_log(): (ttyUSB3): <-- '<CR><LF>*CNTI: 0,LTE<CR><LF><CR><LF>OK<CR><LF>'
modem-manager[25672]: <debug> [1349256758.802283] [mm-at-serial-port.c:334] debug_log(): (ttyUSB3): --> 'AT+CIND?<CR>'
modem-manager[25672]: <debug> [1349256758.821538] [mm-at-serial-port.c:334] debug_log(): (ttyUSB3): <-- '<CR><LF>+CIND: 5,0,1,1,0,0,1,0<CR><LF><CR><LF>OK<CR><LF>'

The signal is good (I measure download rate of 37 mbits/s), and in 3G/2G mode I get the correct signal quality indication.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: network-manager-gnome 0.9.6.2-0ubuntu5
Uname: Linux 3.6.0-030600rc6-generic i686
ApportVersion: 2.6.1-0ubuntu1
Architecture: i386
Date: Wed Oct 3 11:19:55 2012
EcryptfsInUse: Yes
IpRoute:
 default via 89.9.192.92 dev wwan0 proto static
 89.9.192.0/24 dev wwan0 proto kernel scope link src 89.9.192.92 metric 7
 169.254.0.0/16 dev wwan0 scope link metric 1000
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=false
 WWANEnabled=true
 WimaxEnabled=true
ProcEnviron:
 LANGUAGE=nb_NO:nb:no_NO:no:nn_NO:nn:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=nb_NO.UTF-8
 SHELL=/bin/bash
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: yes
  Hard blocked: no
SourcePackage: network-manager-applet
UpgradeStatus: Upgraded to quantal on 2012-08-31 (32 days ago)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 wwan0 gsm connected /org/freedesktop/NetworkManager/Devices/2
 eth0 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/1
 wlan0 802-11-wireless unavailable /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
 running 0.9.7.0 connected enabled enabled disabled enabled enabled