Current Bootchart / breaking SD boot

Mike (mwester) mwester at
Thu Jul 10 03:46:06 CEST 2008

Werner Almesberger wrote:
> Joe Pfeiffer wrote:
>> Are you drawing a distinction between 'turning the modem off'
>> vs. telling the transmitter not to transmit?
> Yes. Some people are concerned that the GSM subsystem may surreptitiously
> communicate even if commanded off. The only way to make sure that this
> doesn't happen is to cut power to the GSM subsystem.

Well, that may be what *SOME* people are concerned about; just to be
clear my concern is not that, it is that at present neither the image
pre-installed on the phone, nor the current ASU image issue the command
to turn off the GSM -- so it will continue to transmit even when Linux
has shutdown, and the host ARM CPU has been powered off.

I'd be much less concerned if all the software distros that can be
flashed to the phone, or at least if the one that ships pre-installed,
actually shut down the GSM when the phone is turned off.

>> In the context of airplane rules, the latter ought to be just as good...
> Yes, that's what any normal phone does anyway :)
> - Werner

Mike (mwester)

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