Sierra/ZTE LTE modem gives no signal quality in LTE mode (only in 3G/2G mode)
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
ModemManager |
Fix Committed
|
Undecided
|
Unassigned | ||
modemmanager (Ubuntu) |
Fix Released
|
High
|
Unassigned |
Bug Description
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[
modem-manager[
modem-manager[
modem-manager[
Seems like the signal quality is the second number:
Oct 1 19:23:39 marius-T1005 ModemManager[
(ttyUSB3): <-- '<CR><LF>+CIND: ("battchg"
msfull"
Oct 1 19:23:39 marius-T1005 ModemManager[
_check_ready(): Modem supports signal quality indications via CIND at index '2'(min: 0, max: 5)
which is reported as zero. The signal is good (I measure download rate of 37 mbits/s), and in 3G/2G mode I get the correct signal quality indication.
Could it be that MM should not use +CIND but instead +CSQ?
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: network-
Uname: Linux 3.6.0-030600rc6
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.
[main]
NetworkingEnab
WirelessEnable
WWANEnabled=true
WimaxEnabled=true
ProcEnviron:
LANGUAGE=
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-
UpgradeStatus: Upgraded to quantal on 2012-08-31 (32 days ago)
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
wwan0 gsm connected /org/freedeskto
eth0 802-3-ethernet unavailable /org/freedeskto
wlan0 802-11-wireless unavailable /org/freedeskto
nmcli-nm:
RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
running 0.9.7.0 connected enabled enabled disabled enabled enabled
Changed in network-manager-applet (Ubuntu): | |
status: | New → Invalid |
summary: |
- Sierra LTE modem gives no signal quality in LTE mode (only in 3G/2G + Sierra/ZTE LTE modem gives no signal quality in LTE mode (only in 3G/2G mode) |
Changed in modemmanager (Ubuntu): | |
status: | New → Triaged |
importance: | Undecided → High |
Changed in modemmanager (Ubuntu): | |
status: | Triaged → In Progress |
no longer affects: | network-manager-applet (Ubuntu) |
apport information