Openmoko Bug #2229: GSM was working fine for months, suddenly will not register using any GSM stack
Openmoko Public Trac
bugs at docs.openmoko.org
Thu May 7 11:31:44 CEST 2009
#2229: GSM was working fine for months, suddenly will not register using any GSM
stack
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Reporter: danek2 | Owner: joerg
Type: defect | Status: accepted
Priority: normal | Milestone:
Component: hardware | Version: GTA02v5
Severity: normal | Keywords: calypso, gsm, registration
Haspatch: 0 | Blockedby:
Estimated: | Patchreview:
Blocking: | Reproducible: always
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Comment(by joerg):
Replying to [comment:5 slm3095om]:
> One thing that I did notice in my testing is that the modem resets with
2008.12 but it hangs with 2009. I have to do an 'echo 1 > power_on' to get
it back. I thought that was a little odd, I would have expected to at
least have to do 'echo 0 > power_on; echo 1 > power_on'
The semantics of modem power management has changed in new kernels,
usually power_on is handled internally. It's the power pushbutton function
of the modem, and new kernels correctly operate this pushbutton for a few
seconds when closing the actual powerswitch to route power to the modem
from battery. Old kernels needed userland to do this and userland didn't
`echo 0 >power_on` after actuating this button.
If this problem is triggered by modem inrush current on registering, could
you please test with a different provider or - better - go to a place with
much higher signal (more close to the basestation) and try registering
there?
--
Ticket URL: <https://docs.openmoko.org/trac/ticket/2229#comment:7>
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