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Opened 3 years ago

#17862 new defect

Huawei E367 QMI USB modem:NETDEV WATCHDOG: wwan0 (qmi_wwan): transmit queue 0 timed out

Reported by: tuksgig Owned by: developers
Priority: normal Milestone: Chaos Calmer 15.05
Component: kernel Version: Trunk
Keywords: qmi Huawei E367 USB modem ar71xx Cc:

Description

Hi,

Recently I've been testing my Huawei E367 QMI protocol modem using uqmi. On desktop Linux with ModemManager the connection is stable, but with OpenWrt on my ar71xx DLink router the connection reliably crashes after a few dhcp renewals. About four hours into a successful qmi protocol connections I get a kernel NETDEV watchdog timeout on wwan0 (see attached kernel log). See attached usb log for further device USB info.

At first I suspected the qmi_wwan kernel module, so I tried both kernel 3.10.49 and 3.14.16 (Desktop is on 3.15.5) with the same result. Next I left 'cat /dev/ttyUSB1' running continuously to report signal strength, and noticed the qmi_wwan link became stable!

Attached is a script cronjob periodically (30 minutes) reading from ttyUSB1, which I now use to keep ttyUSB1 serviced and qmi_wwan from stalling.

Could this be a firmware bug of some kind?

Attachments (4)

netdev-watchdog.txt (4.9 KB) - added by tuksgig 3 years ago.
kernel log netdev watchdog
usbinfo.txt (9.1 KB) - added by tuksgig 3 years ago.
device info
e367-at-info.txt (210 bytes) - added by tuksgig 3 years ago.
firmware info
qmi_read.sh (127 bytes) - added by tuksgig 3 years ago.
cronjob shell script

Download all attachments as: .zip

Change History (4)

Changed 3 years ago by tuksgig

kernel log netdev watchdog

Changed 3 years ago by tuksgig

device info

Changed 3 years ago by tuksgig

firmware info

Changed 3 years ago by tuksgig

cronjob shell script

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