Hi.
On 9.4.2020 16.39, Aleksander Morgado wrote:
I'm working on a patch to detect M2M eUICC profile switches on Quectel
modems. Upon testing with Quectel EG25, which uses QMI, I noticed that
when MM reinitializes a modem (either due to hot-swap or MM restarting),
some of the QMI CIDs don't appear to be released. After ~10 times, the
modem detection fails due to QMI protocol error "ClientIdsExhausted".
The modem needs to be reset to recover from this.
What ModemManager version are you using? Would you be able to confirm
this issue with MM git master?
I was using the latest stable (1.12.8), just tested with master (though
patched it a little to make it build with libqmi 1.24.6 which I've got
installed in my system) - the same problem appears with it.
After investigating further, I suspect the problem could be in
mm_port_qmi_close(); it should probably wait for
qmi_device_release_client() completions before proceeding with closing
the device.
I quickly also tested adding "sleep(2);" before qmi_device_close_async()
call to give some time for releasing to complete and that seemed to fix it.
BR,
- Teijo
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