Comment 1 for bug 1338967

The oFono part seems to be caused by bad startup dependencies. On my machine, the oFono daemon startup happens just a few seconds before the RIL daemon startup, while oFono expects RIL to be up'n'running first.

grep ofono /var/log/syslog:
Jul 8 07:22:21 ubuntu-phablet ofonod[653]: oFono version 1.12
Jul 8 07:22:21 ubuntu-phablet ofonod[653]: RILDEV detected modem type ril, 1 SIM slot(s)
Jul 8 07:22:21 ubuntu-phablet ofonod[653]: create_ril: can't connect to RILD: Connection refused (111)
Jul 8 07:22:21 ubuntu-phablet ofonod[653]: Exiting...
< ... repeats ca. 10 times ... >
Jul 8 07:22:22 ubuntu-phablet ofonod[709]: oFono version 1.12
Jul 8 07:22:22 ubuntu-phablet ofonod[709]: RILDEV detected modem type ril, 1 SIM slot(s)
Jul 8 07:22:22 ubuntu-phablet ofonod[709]: create_ril: can't connect to RILD: Connection refused (111)
Jul 8 07:22:22 ubuntu-phablet ofonod[709]: Exiting...
Jul 8 07:22:22 ubuntu-phablet kernel: [ 3.218832] init: ofono main process (709) terminated with status 1
Jul 8 07:22:22 ubuntu-phablet kernel: [ 3.218861] init: ofono respawning too fast, stopped

/system/bin/logcat -b radio -v time:
07-08 07:22:23.512 D/RILD ( 573): overriding with -s /dev/socket/qemud
07-08 07:22:23.522 I/RIL ( 573): Opening socket /dev/socket/qemud
07-08 07:22:23.522 E/RILC ( 573): RIL_register: RIL version 9
07-08 07:22:23.522 D/RIL ( 573): setRadioState(0)
07-08 07:22:23.522 D/AT ( 573): AT> ATE0Q0V1
07-08 07:22:23.522 D/AT ( 573): AT< OK

I can fix that by delaying oFono's respawns (append 'post-stop exec sleep 1' to /etc/init/ofono.override). But the upstart config also points to a 'rild-ready' signal, so maybe that mechanism doesn't work as intended.