On 10/26/2017 10:48 AM, Eswaran Vinothkumar (BEG/PJ-IOT-EL) wrote:
On 10/25/2017 02:38 PM, Eswaran Vinothkumar (BEG/PJ-IOT-EL) wrote:
For our next connectivity project we are planning to use Connman
along with oFono
The version being used are Connman :1.35 and oFono:1.21
After system start up, I am seeing that the oFono process gets
exited, whenever I try to enable the modem by calling the python
script enable-modem in the test directory. However, if I restart
the ofono systemd service, everything works fine.
A couple of comments here:
i) You have connman and ofono running via systemd and you're calling
enable-modem from the test directory... I don't think this is a robust
way to go about testing things. Try to simplify by stopping connman
and ofono and running ofono manually from the command line before
calling the test script.
# systemctl stop connman
# systemctl stop ofono
# ofonod -d -n
ii) When you say "everything works fine", what do you mean? The test
script can run...?
Ya after restarting the ofono.service , I could successfully run the
I suspect you are seeing the issue I mentioned in iii) below...
iii) There _is_ a race in the gobi module at just the spot that you
are seeing the crash. I have seen it many times but haven't taken the
time to isolate the issue... if I get a moment today, I might take a
look at it. I can trigger it by calling enable-modem too early in the
ofono's startup process... it occurs maybe 1 time in 5 on my setup.
iv) Like Christophe said, disable ofono's signal handler and enable
core dumps before running ofono. The core dump is easier to analyze
than ofono's backtrace.
May I know is there any config option to disable the signal handler in
No, there's not... you need to hack it out of the code. Search for the
following line in src/main.c:
signal = setup_signalfd();
and comment it out. I think that's sufficient...
I have attached the logs for your reference. Please let me know,
if any further log messages are required.
Modem chip. MC7455 from sierra
Linux kernel: 4.9.44-fslc+g8f876e1 (freescale)
Mit freundlichen Grüßen / Best regards
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