From: Alan Stern <stern@rowland.harvard.edu>
To: JH <jupiter.hce@gmail.com>
Cc: linux-usb <linux-usb@vger.kernel.org>
Subject: Re: qmi_wwan error
Date: Fri, 24 Jan 2020 10:09:35 -0500 (EST) [thread overview]
Message-ID: <Pine.LNX.4.44L0.2001241007350.1610-100000@iolanthe.rowland.org> (raw)
In-Reply-To: <CAA=hcWSKCryEZVhWptN9iz1dbh_4rMNp0X1LMop0SA7LjYWRVQ@mail.gmail.com>
On Fri, 24 Jan 2020, JH wrote:
> Hi,
>
> I am running kernel 4.19.75 on iMX6 with a uBlox SARA-R4 LTE modem,
> the modem manager is oFono, connect manager is connman. It could
> connect to LTE between half hours to hours, then it dropped LTE
> connection randomly, here are error messages, what could cause the
> qmi_wwan status received: -71 and qmi_wwan usb_submit_urb failed with
> result -19 errors?
The most likely cause is that the modem's firmware crashed, or it
disconnected itself electronically from the USB bus. Or else somebody
unplugged the USB cable.
Alan Stern
>
> [ 1018.944840] usb 1-1: USB disconnect, device number 2
> [ 1019.072845] option1 ttyUSB0: GSM modem (1-port) converter now
> disconnected from ttyUSB0
> [ 1019.130834] option 1-1:1.0: device disconnected
> [ 1019.142012] qmi_wwan 1-1:1.3: nonzero urb status received: -71
> [ 1019.147909] qmi_wwan 1-1:1.3: wdm_int_callback - 0 bytes
> [ 1019.153254] qmi_wwan 1-1:1.3: wdm_int_callback - usb_submit_urb
> failed with result -19
> [ 1019.228197] option1 ttyUSB1: GSM modem (1-port) converter now
> disconnected from ttyUSB1
> [ 1019.274475] option 1-1:1.2: device disconnected
> [ 1019.340442] qmi_wwan 1-1:1.3 wwan0: unregister 'qmi_wwan'
> usb-ci_hdrc.1-1, WWAN/QMI device
> [ 1022.827992] usb 1-1: new high-speed USB device number 3 using ci_hdrc
> [ 1023.057165] option 1-1:1.0: GSM modem (1-port) converter detected
> [ 1023.097815] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB0
> [ 1023.157293] option 1-1:1.2: GSM modem (1-port) converter detected
> [ 1023.178163] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB1
> [ 1023.201251] qmi_wwan 1-1:1.3: cdc-wdm0: USB WDM device
> [ 1023.243783] qmi_wwan 1-1:1.3 wwan0: register 'qmi_wwan' at
> usb-ci_hdrc.1-1, WWAN/QMI device, 16:ed:38:aa:c5:90
>
> Thank you.
>
> Kind regards,
>
> - jh
next prev parent reply other threads:[~2020-01-24 15:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-24 12:26 qmi_wwan error JH
2020-01-24 15:09 ` Alan Stern [this message]
2020-01-24 21:00 ` JH
2020-01-25 16:14 ` Alan Stern
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