Bug 1729520 - sierra 7807 stuck when connecting immediately after plug in
Summary: sierra 7807 stuck when connecting immediately after plug in
Keywords:
Status: NEW
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: ModemManager
Version: 8.1
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: rc
: 8.0
Assignee: Lubomir Rintel
QA Contact: Desktop QE
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-07-12 13:25 UTC by Vladimir Benes
Modified: 2019-08-15 15:12 UTC (History)
1 user (show)

Fixed In Version:
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Last Closed:
Type: Bug
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Description Vladimir Benes 2019-07-12 13:25:25 UTC
Description of problem:
when I connect Sierra 7607 modem to an USB slot and start connecting immediately after gsm device appears (I have patched kernel to avoid bug 1729083 ) the device never connects. If waiting a minute or so the device goes up correctly.

Version-Release number of selected component (if applicable):
kernel-4.18.0-114.el8.bz1729083.2.x86_64
NetworkManager-1.20.0-0.1.el8.x86_64
libqmi-1.22.4-4.el8.x86_64


How reproducible:
always

Steps to Reproduce:
1. plug in sierra 7607 into rhel8.1 box
2. wait for gsm device to appear with nmcli dev
3. run nmcli con add type gsm ifname \* apn internet autoconnect no
4. nmcli con up gsm

Actual results:
fail

Expected results:
should work immediately

Additional info:

Comment 2 Vladimir Benes 2019-07-12 13:44:14 UTC
when it fails, it's enough to wait for timeout, and then it connects correctly.

Jul 12 09:42:54 gsm-r5s3-01.wlan.rhts.eng.bos.redhat.com ModemManager[13040]: <info>  Simple connect state (4/8): Wait to get fully enabled
Jul 12 09:42:54 gsm-r5s3-01.wlan.rhts.eng.bos.redhat.com ModemManager[13040]: <info>  Simple connect state (5/8): Register
Jul 12 09:42:54 gsm-r5s3-01.wlan.rhts.eng.bos.redhat.com ModemManager[13040]: <debug> Already registered in network '00101', automatic registration not launched...
Jul 12 09:42:54 gsm-r5s3-01.wlan.rhts.eng.bos.redhat.com ModemManager[13040]: <info>  Simple connect state (6/8): Bearer
Jul 12 09:42:54 gsm-r5s3-01.wlan.rhts.eng.bos.redhat.com ModemManager[13040]: <debug> Using already existing bearer at '/org/freedesktop/ModemManager1/Bearer/6'...
Jul 12 09:42:54 gsm-r5s3-01.wlan.rhts.eng.bos.redhat.com ModemManager[13040]: <info>  Simple connect state (7/8): Connect

I think registration of 00101 is somehow crippled. Not sure if BTS doesn't play a role in this game, going to restart it.

Comment 3 Vladimir Benes 2019-07-12 14:52:19 UTC
signal strenght is set to 0% (cached)

[root@gsm-r5s3-01 NetworkManager-ci]# qmicli -d /dev/cdc-wdm0 --nas-get-signal-strength
[12 Jul 2019, 10:07:46] -Warning ** Error reading from istream: Resource temporarily unavailable

error: couldn't create client for the 'nas' service: CID allocation failed in the CTL client: Transaction timed out


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