Ubuntu
modemmanager package

mobile broadband support unreliable

Bug #641727 reported by Richard Lee
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
modemmanager (Ubuntu)
New
Undecided
Unassigned

Bug Description

I have reported several bugs about CDMA broadband support against the network-manager package, but no one seems to look at them. It seems that the support is very flaky. I have to plug and unplug the usb adaptor several times to get it to work. It will connect, and then a few seconds later drop the connection. Only after a number of repeated tries can I get it to stabilize for a while and hold a connection. I have send extensive log output with other bugs showing the failure.

Revision history for this message
Fabio Marconi (fabiomarconi) wrote :

Hello
Can you test your device with a liveCD ?
Thanks
Fabio

Changed in ubuntu:
status: New → Incomplete
Revision history for this message
Richard Lee (rdlee632) wrote :

It sort of happens with the 10.04 LTS live cd, but not exactly the same way. It initially fails to connect in the same way as my installed Ubuntu. Afterwards, however, I seem to be able to reliably make a connection manually with the live cd version, where manually making a connection with my installed version is much trickier (but eventually will succeed if I try enough times). Attached are two logs, the output of 'tail -f /var/log/*.log' while plugging/unplugging my CDMA mobile broadband adapter. The first is when using livecd, the second is when using my installed ubuntu.

The livecd log has many successful cases in it, but you can see that just after the device is plugged in, it deactivates the device with a 'reason 2' code. Perhaps this has something to do with the way the livecd doesn't want to auto connect to a mobile wireless modem, and is thus a red herring?

The installed log has no successful cases in it. After the device is plugged in, it does the same 'reason 2' deactivation. However, then it tries to connect and in fact *succeeds* in connecting. Then, for some reason, the modem-manager closes the device. After that, it does not respond to activation requests again without being unplugged and replugged.

Revision history for this message
Richard Lee (rdlee632) wrote :
Revision history for this message
Fabio Marconi (fabiomarconi) wrote :

from attached logs, daemon.log###modem-manager: Your CDMA modem does not support +CMEE command

affects: ubuntu → modemmanager (Ubuntu)
Changed in modemmanager (Ubuntu):
status: Incomplete → New
Revision history for this message
Richard Lee (rdlee632) wrote :

That seems sort of like a red herring, no? Many modems don't support the CMEE command, whose purpose is to simply changes the formatting of error codes.

To post a comment you must log in.
This report contains Public information  
Everyone can see this information.
Subscribing...

Other bug subscribers

Remote bug watches

Bug watches keep track of this bug in other bug trackers.