<div dir='auto'><div>Have seen kernel message with dmesg during the problem occurs? <br><div class="gmail_extra"><br><div class="gmail_quote">Am 28.08.2020 02:43 schrieb Alex Ballmer <alexb@meshplusplus.com>:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">I have a series of Quectel EP06 modems that occasionally experience a
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deadlock condition. I am running openwrt 18.06.8 using modemmanager
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1.14.0 and libqmi 1.26.2.
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After being online for some time, the modems will eventually lose the
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ability to ping. mmlci still shows the same bearer as when it was
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working. Netifd does not show wwan0 (the network interface for that
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modem) as having an address.
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Attempting to reset the modem via mmcli returns
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<br>
error: couldn't reset the modem:
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'GDBus.Error:org.freedesktop.libqmi.Error.Core.Timeout: Transaction
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timed out'
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Resetting via AT commands (echo -ne "AT+CFUN=1,1\r\n" > /dev/ttyUSB3)
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does not result in any response from the modem. Rebooting the affected
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machine causes the modem to function normally again.
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It should be noted that when the modem enters this state, mmcli still
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reports it as being connected.
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Is this an issue with the modem itself or something that can be worked
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around in software?
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<br>
Thanks
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</p>
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