Red Hat Bugzilla – Bug 542076
NM does not work for USB modem mobile connection every time, but wvdial does
Last modified: 2010-02-08 21:04:10 EST
Description of problem:
I am using USB modem mobile connection to connect to network. Some when signal is weak (I guess), NM does not connect via my device but wvdial is able to do so.
Version-Release number of selected component (if applicable):
Occasionally (happens often enough to record in a week), in case signal is weak (which is a guess)
Steps to Reproduce:
1. Connect via NM (automatically)
3. Try using wvdial and it works
NM does not work everytime.
NM should work for every case.
I understand the above input is not enough to fix things and spot were things needs to get improved.
I would be pleased to give more input or test things
Can you try the latest NetworkManager and ModemManager updates and tell me if that makes the situation any better?
If it doesn't, then we need to debug things more, which you can do by reproducing the problem and then attaching your /var/log/messages file to this bug report. Thanks!
Created attachment 381750 [details]
Attached is the messages file. Updated to latest NM
wvdial worked again.
Ping me if you want more input.
ModemManager is ModemManager-0.2.997-4.git20091218.fc12.x86_64
Created attachment 381754 [details]
with ModemManager 0.2.997-5.git20100101
Tried with 0.2.997-5.git20100101 in update-testing. Same result.
Attached is latest file
What model number is the modem? EC121 or EC168C perhaps? Are you sure you're in an area with OK coverage? It may also take the modem up to a minute to find the network, so you may need to wait a bit before trying to dial.
The logs you've got say the modem failed to dial because of "no service", so I'd assume that the device just doesn't have good enough signal strength to register with the network :(
*** This bug has been marked as a duplicate of bug 553199 ***