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FS#587 - no wwan with qmi based modem quectel ec20 #6886

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openwrt-bot opened this issue Mar 3, 2017 · 2 comments
Closed

FS#587 - no wwan with qmi based modem quectel ec20 #6886

openwrt-bot opened this issue Mar 3, 2017 · 2 comments
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@openwrt-bot
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lynxis:

uqmi hangs on certain commands resulting in a half-connected wwan connection.

device: apu1d
modem: quectel ec20 / qualcom based
affected versions: lede 17.01, trunk

good uqmi version: 2016-08-23-eb1dec7d0dc283a7f61aa574a443a0ab61f8793f
bad uqmi version: 2016-12-19-8ceeab69-1

1553 root 3288 S {qmi.sh} /bin/sh ./qmi.sh qmi setup lte {"ifname":"wwan0","proto":"qmi","apn":"internet"," 1620 root 9024 S uqmi -s -d /dev/cdc-wdm0 --wda-set-data-format 802.3 1817 root 3072 S grep qmi config interface 'lte' option ifname 'wwan0' option proto 'qmi' option apn 'internet' option device '/dev/cdc-wdm0' option dhcp '1'
@openwrt-bot
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JochenFriedrich:

To me this looks more like a kernel bug. Both uqmi versions work ok with 4.4 and fail with 4.9.

This seems to be the bug:

https://lists.freedesktop.org/archives/libqmi-devel/2017-February/002067.html

Jochen

@openwrt-bot
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bmork:

FYI: I just sent a revert for the suspected commit, with CC to stable:
http://www.spinics.net/lists/linux-usb/msg156311.html

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