(09-25-2020, 05:24 AM)lot378 Wrote:---------------------------------------------Quote:If proper power down is to be implemented in the kernel for the modem, to allow safe shutdown of the modem before turning off the 4g-pwr-bat, kernel has to be able to signal to the modem to shut down and wait 30s.
This is not possible on braveheart.
Without this signal, kernel can't do anything to shut down the modem, and would have to rely on userspace to properly manage the modem power up/down sequence. Relying on userspace risks users shutting down the modem without proper wait time of 30s, risking modem damage (flash data corruption).
I believe on PMOS they still wait 30 seconds for shutdown even on 1.2a.
It's not necessary on the latest Quectel firmware, it safely shuts down in 2s. The question is only if it's getting the shutdown message.
Thank you. This is helpful. I have been in a quandary as to if using the power button to power down with the on/off button on Mobian (shutdown occurs within very few seconds) could corrupt the modem's firmware.
My EG25 has not functioned in my BH since first receiving. I have flashed the firmware but it did not bring it to life. I don't believe I abruptly removed power from my BH at any point even on initial unboxing/setup but cannot be absolutely certain of this. My PMOS Conv. PP modem works fine.
