ModemManager and Quectel RM520N-GL

[Patrick Kosiol]

Hi Peter,

Thanks for the info.

Actually, the lsusb output was incomplete. It looks like the one attached so the device is actually there. Yet, you are right, the /dev/ttyUSB device is not present. 

I checked the state of the usb device and it appears to be loaded with the qmi_wwan driver, which seems correct:

# lsusb -t
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/5p, 480M
        |__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=smsc95xx, 480M
        |__ Port 2: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 3: Dev 5, If 0, Class=Vendor Specific Class, Driver=rtl88XXau, 480M
        |__ Port 4: Dev 6, If 0, Class=Mass Storage, Driver=usb-storage, 480M
        |__ Port 5: Dev 7, If 0, Class=Vendor Specific Class, Driver=, 480M
        |__ Port 5: Dev 7, If 1, Class=Vendor Specific Class, Driver=, 480M
        |__ Port 5: Dev 7, If 2, Class=Vendor Specific Class, Driver=, 480M
        |__ Port 5: Dev 7, If 3, Class=Vendor Specific Class, Driver=, 480M
        |__ Port 5: Dev 7, If 4, Class=Vendor Specific Class, Driver=qmi_wwan, 480M

Do you happen to have any other suggestion?

With regards,
Patrick Kosiol

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