Openmoko Bug #1898: Phone subsystem does not always suspend/resume properly

Openmoko Public Trac bugs at
Fri Aug 29 04:03:35 CEST 2008

#1898: Phone subsystem does not always suspend/resume properly
 Reporter:  robolange  |          Owner:  openmoko-devel
     Type:  defect     |         Status:  new           
 Priority:  normal     |      Milestone:  Om2007.2      
Component:  unknown    |        Version:  GTA02v5       
 Severity:  major      |       Keywords:                
Blockedby:             |   Reproducible:  sometimes     
 Blocking:             |  
 Using OM2007.2 with the power management turned on, after the phone
 suspends, the phone subsystem does not always resume properly.  When this
 happens, a reboot seems to be required to regain phone functionality.

 When first booting the phone, once network registration happens, you can
 make and receive phone calls.  Let the phone go unused for a while, so
 that it suspends itself.  Now make a call to the phone.

 With some probability (p), the phone will wake up and you can receive the
 call, and then make other calls.  With (1-p), the phone will not wake up.
 In this case, even if you wake it up manually by pushing the power button,
 you will not be able to send or receive calls.  Regardless, the icon for
 signal strength and the operator name remain the same as they were before
 the suspend.

 Using `libgsmd-tool -m shell`, I get the error "Can't connect to gsmd".  I
 restart gsmd.  I invoke `libgsmd-tool -m shell` again, and attempt to
 power up the antenna using command `O`.  It will fail often; see bug
 #1415.  Once it powers up, use the registration command `r`.  You will see
 signal strength and a registration printed to the console.  However, you
 do not get the pop-up announcing the registration, and the signal strength
 and operator name does not change.  You still will not be able to make or
 receive phone calls.

 Something must not have woken up correctly.  At this point, the only way I
 know to fix it is to reboot the phone. :(

 This bug seriously affects my ability to use the device as a phone,
 because I need suspend/resume, else the battery does not last even one
 business day.  I consider the bug quite severe, but its severity would be
 less if I knew of a way to regain phone functionality without a time-
 consuming reboot.

 Also, I don't know this for sure, but it seems that the probability of the
 phone resuming correctly is inversely correlated to how long it has been
 suspended.  It seems that when I frequently resume the phone, I rarely
 have to reboot, whereas when I go a "long" time without resuming, I almost
 always have to reboot.

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