(Devicecode with scopes only) EM06 Sometimes boots without any AT ports

Nadie ha tomado este issue todavía.

This problem is independent of devicecode as it can be reproduced with only mmcli running.

See here the EM06
- starts with no AT ports
- reboots with AT ports
- reboots again with AT ports
- reboots last time with no AT ports

```
root@OpenWrt:~/src# mmcli -m 17
-----------------------------------
General | path: /org/freedesktop/ModemManager1/Modem/17
| device id: 8dc5e5c2b5c996215d6759317b8d05c778fae11d
-----------------------------------
Hardware | manufacturer: Quectel
| model: EM06-E
| firmware revision: EM06ELAR03A08M4G
| carrier config: ROW_Generic_3GPP
| carrier config revision: 06010821
| h/w revision: 20000
| supported: gsm-umts, lte
| current: gsm-umts, lte
| equipment id: 866680041259328
-----------------------------------
System | device: /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.2
| drivers: option1, qmi_wwan
| plugin: quectel
| primary port: cdc-wdm0
| ports: cdc-wdm0 (qmi), ttyUSB0 (qcdm), ttyUSB1 (gps), wwan0 (net) <<----- no at ports
-----------------------------------
Status | state: failed
| failed reason: sim-missing
| power state: on
-----------------------------------
Modes | supported: allowed: 3g; preferred: none
| allowed: 4g; preferred: none
| allowed: 3g, 4g; preferred: 4g
| allowed: 3g, 4g; preferred: 3g
| current: allowed: any; preferred: none
-----------------------------------
Bands | supported: utran-1, utran-3, utran-5, utran-8, eutran-1, eutran-3,
| eutran-5, eutran-7, eutran-8, eutran-20, eutran-28, eutran-32,
| eutran-38, eutran-40, eutran-41
-----------------------------------
IP | supported: ipv4, ipv6, ipv4v6

root@OpenWrt:~/src# mmcli -m 17 -r
successfully reseted the modem

root@OpenWrt:~/src# mmcli -m 18
-----------------------------------
General | path: /org/freedesktop/ModemManager1/Modem/18
| device id: 8dc5e5c2b5c996215d6759317b8d05c778fae11d
-----------------------------------
Hardware | manufacturer: Quectel
| model: EM06-E
| firmware revision: EM06ELAR03A08M4G
| carrier config: ROW_Generic_3GPP
| carrier config revision: 06010821
| h/w revision: 20000
| supported: gsm-umts, lte
| current: gsm-umts, lte
| equipment id: 866680041259328
-----------------------------------
System | device: /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.2
| drivers: option1, qmi_wwan
| plugin: quectel
| primary port: cdc-wdm0
| ports: cdc-wdm0 (qmi), ttyUSB0 (qcdm), ttyUSB1 (gps),
| ttyUSB2 (at), ttyUSB3 (at), wwan0 (net) <<---- at ports
-----------------------------------
Status | state: failed
| failed reason: sim-missing
| power state: on
-----------------------------------
Modes | supported: allowed: 3g; preferred: none
| allowed: 4g; preferred: none
| allowed: 3g, 4g; preferred: 4g
| allowed: 3g, 4g; preferred: 3g
| current: allowed: any; preferred: none
-----------------------------------
Bands | supported: utran-1, utran-3, utran-5, utran-8, eutran-1, eutran-3,
| eutran-5, eutran-7, eutran-8, eutran-20, eutran-28, eutran-32,
| eutran-38, eutran-40, eutran-41
-----------------------------------
IP | supported: ipv4, ipv6, ipv4v6

root@OpenWrt:~/src# mmcli -m 18 -r
successfully reseted the modem

root@OpenWrt:~/src# mmcli -m 19
-----------------------------------
General | path: /org/freedesktop/ModemManager1/Modem/19
| device id: 8dc5e5c2b5c996215d6759317b8d05c778fae11d
-----------------------------------
Hardware | manufacturer: Quectel
| model: EM06-E
| firmware revision: EM06ELAR03A08M4G
| carrier config: ROW_Generic_3GPP
| carrier config revision: 06010821
| h/w revision: 20000
| supported: gsm-umts, lte
| current: gsm-umts, lte
| equipment id: 866680041259328
-----------------------------------
System | device: /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.2
| drivers: option1, qmi_wwan
| plugin: quectel
| primary port: cdc-wdm0
| ports: cdc-wdm0 (qmi), ttyUSB0 (qcdm), ttyUSB1 (gps),
| ttyUSB2 (at), ttyUSB3 (at), wwan0 (net) <<----- at ports
-----------------------------------
Status | state: failed
| failed reason: sim-missing
| power state: on
-----------------------------------
Modes | supported: allowed: 3g; preferred: none
| allowed: 4g; preferred: none
| allowed: 3g, 4g; preferred: 4g
| allowed: 3g, 4g; preferred: 3g
| current: allowed: any; preferred: none
-----------------------------------
Bands | supported: utran-1, utran-3, utran-5, utran-8, eutran-1, eutran-3,
| eutran-5, eutran-7, eutran-8, eutran-20, eutran-28, eutran-32,
| eutran-38, eutran-40, eutran-41
-----------------------------------
IP | supported: ipv4, ipv6, ipv4v6

root@OpenWrt:~/src# mmcli -m 19 -r
successfully reseted the modem

root@OpenWrt:~/src# mmcli -m 20
-----------------------------------
General | path: /org/freedesktop/ModemManager1/Modem/20
| device id: 8dc5e5c2b5c996215d6759317b8d05c778fae11d
-----------------------------------
Hardware | manufacturer: Quectel
| model: EM06-E
| firmware revision: EM06ELAR03A08M4G
| carrier config: ROW_Generic_3GPP
| carrier config revision: 06010821
| h/w revision: 20000
| supported: gsm-umts, lte
| current: gsm-umts, lte
| equipment id: 866680041259328
-----------------------------------
System | device: /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.2
| drivers: option1, qmi_wwan
| plugin: quectel
| primary port: cdc-wdm0
| ports: cdc-wdm0 (qmi), ttyUSB0 (qcdm), ttyUSB1 (gps), wwan0 (net) <<----- no at ports
-----------------------------------
Status | state: failed
| failed reason: sim-missing
| power state: on
-----------------------------------
Modes | supported: allowed: 3g; preferred: none
| allowed: 4g; preferred: none
| allowed: 3g, 4g; preferred: 4g
| allowed: 3g, 4g; preferred: 3g
| current: allowed: any; preferred: none
-----------------------------------
Bands | supported: utran-1, utran-3, utran-5, utran-8, eutran-1, eutran-3,
| eutran-5, eutran-7, eutran-8, eutran-20, eutran-28, eutran-32,
| eutran-38, eutran-40, eutran-41
-----------------------------------
IP | supported: ipv4, ipv6, ipv4v6
```

Not going to make a fix for this now (in migration phase) because:
- This is not part of feature parity (EM06 was not compatible at all before)
- I do not have time nor patience for this petty device

No se nombra ningún archivo fuente ni ninguna prueba. Empieza reproduciendo la secuencia con mmcli -m y reinicios repetidos del módem en el Quectel EM06-E, y después sigue cómo se enumera el dispositivo tras cada reinicio. Se considera terminado cuando el módem expone sistemáticamente sus puertos AT en lugar de arrancar intermitentemente sin ellos.

Escrito por el modelo de indexación a partir del texto del issue.