Sierra WP76xx modem is not detected as QMI-capable.

Solution Verified - Updated -

Issue

  • ModemManager is always using AT port as primary.
  • Enable DTR quirk for Sierra WP76xx modems.
  • How can I make my Sierra modem to use QMI(raw_ip) over ppp?

Environment

  • Red Hat Enterprise Linux(RHEL) 7
  • Red Hat Enterprise Linux(RHEL) 8
  • Sierra WP76xx Wireless USB Modem.

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