[Bug 1289] New: PSC (power saving commands in muxer mode) seems to be broken

bugzilla-daemon at bugzilla.openmoko.org bugzilla-daemon at bugzilla.openmoko.org
Fri Mar 21 17:13:34 CET 2008


           Summary: PSC (power saving commands in muxer mode) seems to be
           Product: Neo1973 Hardware
           Version: GTA02v4
          Platform: Neo1973
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: GSM Modem
        AssignedTo: sean_chiang at openmoko.org
        ReportedBy: mdt at emdete.de
                CC: buglog at lists.openmoko.org

the gsm.07.10 spec chapter describes that the modem sends a PSC request
to indicate sleep. in case of wake up it sends another PSC request. i've never
seen any PSC request from the modem.

none the less the modem goes to sleep and does not allow sending packages
anymore. you have to wake up it in the way described in chapter 5.4.7 sending
flag-chars until the other end response with a flag-char. i never received any
such char from the modem.

just sending several flag-chars before any package wakes up the modem most of
the times but not always. in some cases the muxer runs into a timeout and the
modem can't be activated anymore.

i'm the author of gsm0710muxd and that's the area where i see this behavior.

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