qmicli working for EM7455

[Tor Rune Skoglund]

This seems to be quite similar to our issue with Sierra Wireless MC7304.

See my post yesterday: 
https://lists.freedesktop.org/archives/libqmi-devel/2020-March/003252.html

I have no "proper" fix, but really interested in finding one. Our very 
temporary fix was to keep resetting the USB port to make the modem also 
reset until we by pure luck gets it to work.

Best regards,

Tor Rune Skoglund

Den 30.03.2020 07:40, skrev Brandon Lee:
> I am having issues with EM7455.
> I used `.rules` to make sure device ATTRs use qmi_wwan driver
> it shows in `lsusb -t` that modem is using these drivers.
> Running latest firmware update for ATT, and have tried GENERIC
>
> When running `qmi-network /dev/cdc-wdmX start` I get :
> ```Checking data format with 'qmicli -d /dev/cdc-wdm2 
> --wda-get-data-format '...
> error: couldn't create client for the 'wda' service: CID allocation 
> failed ine CTL client: Transaction timed out
> Device link layer protocol not retrieved: WDA unsupported
> Starting network with 'qmicli -d /dev/cdc-wdm2 
> --wds-start-network=apn='broadd'  --client-no-release-cid '...
> error: couldn't create client for the 'wds' service: CID allocation 
> failed ine CTL client: Transaction timed out
> error: network start failed, client not allocated
> ```
>
>
> When I try to run Start-network manually, i get this response:
> ```
> error: couldn't create client for the 'wds' service: CID allocation 
> failed ine CTL client: Transaction timed out
> ```
>
> If I remove the .rules file from running giving the port mbim_wwan, I 
> have been able to run `mbim-network /dev/cdc-wdmX start` and get a 
> network start successfully, but I am not able to get an IP address.
> `ifconfig` shows the interface up but does not give it an IP address.
>
> This modem would be the second modem I am running on my Debian device, 
> the primary(working) one now is MC7455 with qmi and raw-ip.  I am able 
> to get DHCP address with this modem fine.
>
> I have read that you need to get DHCP address from another source, i 
> am using systemd-networkd retrieve an IP, just as I do with my MC7455.
> Can you help with fixing in either way?
>
> _______________________________________________
> libqmi-devel mailing list
> libqmi-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/libqmi-devel
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