On 29 Sep 2015 11:20, "Daniel Thompson" <email@example.com> wrote:
> On 28/09/15 19:52, Grant Likely wrote:
>> >> PS
>> >> Does anyone have a canned command to deliberately corrupt the
>> boot-and-rootfs so I can get the board to jump into fastboot (so I can
>> try a snapshot) without having to take the sensors board of the top so I
>> can press Vol- ;-) ?
>> You should be able to use the Sonic Screwdriver 96boardsctl utility to
>> reset the board. It twiddles the reset line on the LS connector, which
>> is the same signal as Vol- (at least, so I'm told)
> Ah... Reset == Vol-Down. I didn't think if that (Esla: that would explain why the reset button on the Sonic Screwdriver didn't do what we were expecting).
> Anyhow the trick works.
> That said, rather frustratingly the trick only works when I can physically un/plug the power to the main board (if I use the 'screwdriver to simulate a long press off SW2 the board doesn't revisit fastboot properly).
I think we need some help from our Qualcomm friends here on a reset sequence. The 'screwdriver has access to the power and reset button signals, and I can make them be twiddle in whatever order is required.
Does perhaps Vol- need to be held down before pressing power?