qmicli working for EM7455

[Brandon Lee]

Doing some research, getting referred a link that didnt help, and a some
rest landed me to think of using a different format. I will try this later
today.
Previous format i tried:
# assign module1 to cdc-wdm0
KERNEL=="cdc-wdm0", \
ATTR{idProduct}=="9071", \
SYMLINK+="cdc-wdm0"

Looking to try:
KERNEL=="cdc-wdm*", KERNELS=="1-4:1.0", SYMLINK+="cdc-wdm"

What i was reading from had this:
KERNEL=="ttyACM*", KERNELS=="1-4:1.0", SYMLINK+="sensor_0"

I am not sure if mine will work as this read also said KERNEL will be
tty*** every time bc thats how its seen. Im not sure but if it works it
will be assigning the physical port to cdc-wdm*



On Mon, Mar 30, 2020, 2:58 AM Tor Rune Skoglund <trs at fourc.eu> wrote:

> 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 listlibqmi-devel at lists.freedesktop.orghttps://lists.freedesktop.org/mailman/listinfo/libqmi-devel
>
>
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