I just booted a B+ and checked.guzunty wrote:@Joan, could be.
The ID_SC is not a signal defined in the Broadcom Peripherals manual, so I assume it is a signal defined on the RPi Schematic. Thus I couldn't find out more.
Pull-up or not, the current configuration is demonstrably insufficient to prevent re-booting on some RPi's during halt. I'm hoping to find that a simple software change will suffice to fix this.
If there is a pull-up there, a jumper to ground is going to be sinking some current (possibly damaging the SOC). It would be good to know if this is the case so we can abandon our workaround.
Alex, you're set up for measuring RPi current consumption, can you check the effect of running with that jumper in place?
There do not appear to be any pull ups on gpios 0/1.
I applied the internal pull downs and gpios 0/1 read as 0. The pull-downs should easily be defeated by an external I2C pull-up if present.