Avoiding modem flash-memory corruption?
#6
Not on CE, because the hardware issue has been resolved, according to the Wiki:


Quote:Modem PWR_KEY signal resistor population

Resolved in v1.2 by separating the modem PWRKEY (PB3) and STATUS (PH9) signals.

On the dev phone (1.0) this signal was connected to PB3. This allows for turning on/off the modem via GPIO from a kernel driver. 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).


Messages In This Thread
RE: Avoiding modem flash-memory corruption? - by heng - 06-16-2020, 06:01 AM

Possibly Related Threads…
Thread Author Replies Views Last Post
  RAM corruption, possible eMMC corruption alnyan 3 403 08-24-2022, 03:07 AM
Last Post: JeremyWadsworth
  firmware udate Quectel EG25-G modem alwi 7 1,818 07-06-2022, 01:43 PM
Last Post: user641
  Need command to tell what modem firmware I am on. purpletiger 4 921 07-06-2022, 12:35 PM
Last Post: Zebulon Walton
  The modem does not recognize Korean SIM cards (what?) bdicewk 9 1,303 06-13-2022, 04:12 AM
Last Post: zetabeta
  Modem Hardware bad? Not ready for 5g?? linux76 8 2,276 05-31-2022, 06:41 PM
Last Post: SwordfishII
  Modem in failed state, not sending/receiving SMS brb78 5 1,510 03-31-2022, 08:37 AM
Last Post: wibble
  Modem Dead? grimlok 5 1,638 03-12-2022, 04:38 PM
Last Post: bcnaz
  Question regarding modem AntonReiser 21 6,754 02-14-2022, 12:23 PM
Last Post: vap0rtranz
Question Powering the modem after turning off the smartphone Mikoduso 3 1,419 02-04-2022, 04:06 PM
Last Post: grwlf
Question Modem shield feklee 3 1,639 12-13-2021, 01:06 PM
Last Post: feklee

Forum Jump:


Users browsing this thread: 2 Guest(s)