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Disabling the modem should put signal strength to 0%

What happens?

When putting the modem into low power mode or disabled, the signal strength is still cached and not 0%. DBus clients such as PulseAudio or mmcli still think there's a signal quality value available but we know there's no signal because the modem is offline.

mmcli -m any reports:

  Status   |                    lock: sim-pin2
           |          unlock retries: sim-pin (3), sim-puk (10), sim-pin2 (3), sim-puk2 (10)
           |                   state: disabled
           |             power state: low
           |          signal quality: 67% (cached)

If you turn on the modem again, the signal quality gets updated:

  Status   |                    lock: sim-pin2
           |          unlock retries: sim-pin (3), sim-puk (10), sim-pin2 (3), sim-puk2 (10)
           |                   state: registered
           |             power state: on
           |             access tech: lte
           |          signal quality: 75% (recent)

What's supposed to happen?

Signal strength is set to 0% because the modem is offline.

Environment

  • ModemManager 1.18.6
  • postmarketOS edge
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