ModemManager has a bogus modem state transition from 'enabling' to 'disabled':
ModemManager[26214]: <info> Modem fully enabled...
ModemManager[26214]: <info> Modem /org/freedesktop/ModemManager1/Modem/2: state changed (enabling -> disabled)
The root cause seems to be the following:
get_current_consolidated_state() in MMIfaceModem returns
MM_MODEM_STATE_DISABLED as the default fallback value. When
mm_iface_modem_update_state() is invoked to transition the modem state from
MM_MODEM_STATE_ENABLING to MM_MODEM_STATE_ENABLED, the following code can
potentially cause the final state to be MM_MODEM_STATE_DISABLED instead.
/* Enabled may really be searching or registered */
if (new_state == MM_MODEM_STATE_ENABLED)
new_state = get_current_consolidated_state (self);
https://code.google.com/p/chromium-os/issues/detail?id=38173
Ben Chan
69aff6183a