AnsweredAssumed Answered

cpu hangs randomly but can't be reset by watchdog

Question asked by Feifei Hu on Sep 16, 2017
Latest reply on Oct 15, 2017 by Feifei Hu

We are running Android 4.4.3 with kernel3.10.53 in imx6dl,recently we meet strange cpu hang issue, it happens suddenly after clicking something , kernel is irresponsible at all,even sysrq has no effect, and the screen is blank,seems no video output from CPU,but the watchdog seems does not work, the CPU never be reset unless we cut down the power.

 

Can anyone help explain why CPU won't be reset in this case? How can we find out the root cause of hanging?

 

Thanks!

Outcomes