ModemManager

  1. Bug #977761
  2. Comment #12

Comment 12 for bug 977761

Revision history for this message
Marius B. Kotsbak (mariusko) wrote : Re: Connection with ZTE MF820D LTE/4G modem not using new qmi-wdm/qmi_wwan kernel modules

The kernel fix actually breaks the use of the modem with Network manager, so this must be solved before Ubuntu 12.10:

Jun 11 13:42:53 marius-T1005 NetworkManager[1174]: <info> Auto-activating connection 'Netcom'.
Jun 11 13:42:53 marius-T1005 NetworkManager[1174]: <info> Activation (wwan0) starting connection 'Netcom'
Jun 11 13:42:53 marius-T1005 NetworkManager[1174]: <info> (wwan0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Jun 11 13:42:53 marius-T1005 NetworkManager[1174]: <info> Activation (wwan0) Stage 1 of 5 (Device Prepare) scheduled...
Jun 11 13:42:53 marius-T1005 NetworkManager[1174]: <info> Activation (wwan0) Stage 1 of 5 (Device Prepare) started...
Jun 11 13:42:53 marius-T1005 NetworkManager[1174]: <info> (wwan0): device state change: prepare -> need-auth (reason 'none') [40 60 0]
Jun 11 13:42:53 marius-T1005 NetworkManager[1174]: <info> Activation (wwan0) Stage 1 of 5 (Device Prepare) complete.
Jun 11 13:42:53 marius-T1005 NetworkManager[1174]: <info> Activation (wwan0) Stage 1 of 5 (Device Prepare) scheduled...
Jun 11 13:42:53 marius-T1005 NetworkManager[1174]: <info> Activation (wwan0) Stage 1 of 5 (Device Prepare) started...
Jun 11 13:42:53 marius-T1005 NetworkManager[1174]: <info> (wwan0): device state change: need-auth -> prepare (reason 'none') [60 40 0]
Jun 11 13:42:53 marius-T1005 NetworkManager[1174]: <info> Activation (wwan0) Stage 1 of 5 (Device Prepare) complete.
Jun 11 13:43:19 marius-T1005 NetworkManager[1174]: <warn> GSM connection failed: (32) Serial command timed out
Jun 11 13:43:19 marius-T1005 NetworkManager[1174]: <info> (wwan0): device state change: prepare -> failed (reason 'unknown') [40 120 1]
Jun 11 13:43:19 marius-T1005 NetworkManager[1174]: <warn> Activation (wwan0) failed.
Jun 11 13:43:19 marius-T1005 NetworkManager[1174]: <info> (wwan0): device state change: failed -> disconnected (reason 'none') [120 30 0]
Jun 11 13:43:19 marius-T1005 NetworkManager[1174]: <info> (wwan0): deactivating device (reason 'none') [0]

I guess modemmanager should communicate with the new /dev/cdc-wdm0 instead of wwan0.