Hmm, strange, I tried to restart ofonod several times, the last one
was able to reconnect the 4G and network automatically after removing
the antenna to lose network, then adding the antenna, the only
difference was there were many messages popped out in the console
screen:

[33383.892047] IPv6: ADDRCONF(NETDEV_UP): mlan0: link is not ready
[33383.961208] IPv6: ADDRCONF(NETDEV_UP): wwan0: link is not ready
[33385.634408] mwifiex_sdio mmc0:0001:1: info: trying to associate to 'JupiterIo
T' bssid 34:08:04:12:b1:a2
[33385.658542] mwifiex_sdio mmc0:0001:1: info: associated to bssid 34:08:04:12:b
1:a2 successfully
[33385.800544] IPv6: ADDRCONF(NETDEV_CHANGE): mlan0: link becomes ready
[33385.874181] mwifiex_sdio mmc0:0001:1: CMD_RESP: cmd 0x23f error, result=0x2
[33453.714288] mwifiex_sdio mmc0:0001:1: info: successfully disconnected from 34
:08:04:12:b1:a2: reason code 3
[33453.771463] IPv6: ADDRCONF(NETDEV_UP): mlan0: link is not ready
[33453.836374] IPv6: ADDRCONF(NETDEV_UP): wwan0: link is not ready

it looks like when it did not work that some monitoring and callback
process was not activated, when it worked, the some process was
activated.

What I might missing here? Please see the attached log file
ofono_debug6.txt which is able to reconnect.

I'll do more test, something is not stable or missing.

Thank you.



On 11/20/20, Jupiter <jupiter.hce@gmail.com> wrote:
> Hi,
>
> I am running ofono version 1.30 for uBlox SARA-R4 QMI on iMX6, it is
> functional well, but there is one problem, it failed to be reconnected
> when the 4G LTE signaling strength level is back to normal. Here is
> what I tested:
>
> - Connect antenna, it was running fine, network is connected.
>
> - Remove the antenna, the network is down.
>
> - Wait for a while, reconnect the antenna, the ofono could not
> reconnect, the driver was still there.
>
> - If I restart ofnono the connection would be back.
>
> I tested the same sequence on SARA EVK which is not running ofono, it
> is capable of re-register automatically.
>
> Appreciate your sight comments if it is ofono issue or QMI issue or
> something else, please find the attached debug file.
>
> Thank you.
>
> Kind regards,
>
> - jupiter
>


-- 
"A man can fail many times, but he isn't a failure until he begins to
blame somebody else."
-- John Burroughs