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Linux/AM3352: USB modem issue

Luigi Rizzi
Prodigy 40 points

Part Number: AM3352

Tool/software: Linux

Hello,

I'm working on a custom board based on Sitara AM3352, with Linux-RT 4.4.19.

I have a Modem connected via USB interface, and when the PPP crash, my application turn off and on the modem.

In this situation the entire system slow-down an I need to reboot.

//-------------------------------------------------------------

cat /proc/loadavg

18.50 8.84 3.81 2/117 31510

//-------------------------------------------------------------

Turning off the modem, removes the USB interface used by PPP connection, and it seems to create this problem.

Could you give me any advice?

Regards,

Luigi

  • 0
    TI__Guru**** 181896 points

    Luigi,

    Luigi Rizzi said:
    I'm working on a custom board based on Sitara AM3352, with Linux-RT 4.4.19.

    Have you tested with non-RT linux kernel?

    Luigi Rizzi said:
    when the PPP crash, my application turn off and on the modem.

    Any crash log? Is the userspace application or kernel crashed?

    Luigi Rizzi said:
    In this situation the entire system slow-down an I need to reboot.

    Which application uses all the resources at this moment?

    Luigi Rizzi said:
    removes the USB interface used by PPP connection, and it seems to create this problem.

    Do you mean this "solve" the problem?

  • 0
    TI__Guru**** 181896 points
    Luigi,

    I haven’t heard back from you, I’m assuming you were able to resolve your issue. If not, just post a reply below (or create a new thread if the thread has locked due to time-out). thanks.