[Bug 1024] gsm modem oscillating between registrated / not-registrated

bugzilla-daemon at bugzilla.openmoko.org bugzilla-daemon at bugzilla.openmoko.org
Tue May 13 12:15:04 CEST 2008


------- Additional Comments From mickey at openmoko.org  2008-05-13 12:15 -------
Guys, this is a Heisenbug (http://en.wikipedia.org/wiki/Heisenbug).

All my options of doing any research on this are now exhausted. Last night, I
used GTA02 #60 to do some modem-stress-tests -- hammering it with commands on
multiple virtual channels while being registered to the network -- and guess
what... over 12 hours there has not been a _single_ +CREG: 0.

And yes, this is the same phone, same SIM card, same location, same
initsequence, same cell tower, same everything.

Now we can only pray that it does not occur too often in the field.

The only remaining scientific attempt to find out what is going on would be
someone scrutinizing this by using the GSM low-level debug and GNU radio.

Until then this is my last comment on this bug.

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