[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
http://bugzilla.openmoko.org/cgi-bin/bugzilla/show_bug.cgi?id=1289
Summary: PSC (power saving commands in muxer mode) seems to be
broken
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 5.1.5.1 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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