<div dir="ltr"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">it only seems to happen with the single-stack IP types (both IPv4- and IPv6-only), never with dual-stack. </blockquote><div>From what I've seen many carriers (and subsets of towers) don't support every IP type, especially IPv6.</div></div> <div class="gmail_quote"><div dir="ltr">On Tue, Sep 4, 2018 at 6:17 AM Aleksander Morgado <<a href="mailto:aleksander@aleksander.es">aleksander@aleksander.es</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hey, > > I have an 'HP lt4120 Snapdragon X5 LTE' WWAN module running firmware > revision 'T77W595.F0.0.0.6.6.GC.029 1 [Jul 06 2016 23:00:00' (latest > available on HP's web site). > > It tends to frequently get to a state where MM fails to establish single- > stack connections while in LTE coverage. I'm pretty sure it's not a > network or subscription problem as the problem is there in different > PLMNs and SIM cards from different operators, and it works fine using > other UEs like Android and Jolla phones. I've set up the 3GPP profile > like so: > > $ sudo qmicli -p -d /dev/cdc-wdm0 --wds-get-profile-list=3gpp > Profile list retrieved: > [1] 3gpp - profile1 > APN: 'telenor.smart' > PDP type: 'ipv6' > Auth: 'none' > > Using qmicli it seems to connect without problems: > > $ sudo qmicli -p -d /dev/cdc-wdm0 --wds-start-network=3gpp-profile=1 > [/dev/cdc-wdm0] Network started > Packet data handle: '68385664' > > But MM fails (and so does NM): > > $ sudo /usr/bin/mmcli -m 0 --simple-connect=apn=telenor.smart,ip-type=ipv6 > error: couldn't connect the modem: 'Timeout was reached' > > This results in the following being logged: > > <info> Simple connect started... > <info> Simple connect state (4/8): Wait to get fully enabled > <info> Simple connect state (5/8): Register > <info> Simple connect state (6/8): Bearer > <info> Simple connect state (7/8): Connect > <info> Modem /org/freedesktop/ModemManager1/Modem/0: state changed (registered -> connecting) > <info> Modem /org/freedesktop/ModemManager1/Modem/0: state changed (connecting -> registered) > [/dev/cdc-wdm0] No transaction matched in received message > [/dev/cdc-wdm0] Received unexpected message (translated)... >>>>>>> Header: >>>>>>> length = 76 >>>>>>> type = command-done (0x80000003) >>>>>>> transaction = 31 >>>>>>> Fragment header: >>>>>>> total = 1 >>>>>>> current = 0 >>>>>>> Contents: >>>>>>> status error = 'Failure' (0x00000002) >>>>>>> service = 'basic-connect' (a289cc33-bcbb-8b4f-b6b0-133ec2aae6df) >>>>>>> cid = 'packet-service' (0x0000000a) > > It only happens in LTE coverage, UMTS and GSM has no issues at all. Also > it only seems to happen with the single-stack IP types (both IPv4- and > IPv6-only), never with dual-stack. > > Anyone seen something like this before and have any suggestion on how to > avoid/prevent it? > No idea, sorry. > If I power down my laptop completely and bring it back up, that might > might shake it loose for a while, but my test scripts that iterates > through all PLMNs and all RATs and tries to connect in each using all > three IP types will usually get it back in the stuck state again. > > Is there a way to fully power cycle the WWAN module without > powercycling the entire laptop, by the way? > $ sudo mmcli -m 0 --reset -- Aleksander <a href="https://aleksander.es" rel="noreferrer" target="_blank">https://aleksander.es</a> _______________________________________________ ModemManager-devel mailing list <a href="mailto:ModemManager-devel@lists.freedesktop.org" target="_blank">ModemManager-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel</a> </blockquote></div>