[Bug 1003] New: GSM modem is not powered down when Linux is shut down

bugzilla-daemon at bugzilla.openmoko.org bugzilla-daemon at bugzilla.openmoko.org
Fri Nov 9 23:38:13 CET 2007


           Summary: GSM modem is not powered down when Linux is shut down
           Product: OpenMoko
           Version: 2007.2
          Platform: Neo1973
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gsmd
        AssignedTo: laforge at openmoko.org
        ReportedBy: mwester at dls.net
                CC: buglog at lists.openmoko.org

The GSM modem on the GTA01 is wired on the upstream side of the power management
chip.  Furthermore, the GSM modem does not power off based on any external
signal, rather it needs to sent the AT at POFF command.

The attached shutdown script resets the modem (carefully, so as to avoid locking
up the kernel, or filling up buffers with infinitely echoed characters, or other
known GSM/serial interactions known to be potentially problematic on the GTA01.)

(The submitter of this script thinks that placing this logic into the "stop"
portion of /etc/init.d/gsmd is cleaner, and more appropriate.  However, it is
implemented as a separate shutdown script on the advice of roh, so as to allow
one to shut down gsmd using the /etc/init.d/gsmd script without powering off the
modem.  Either way works.)

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