ZTE's MBIM stack... Broken or not?

[Markus Gothe]

For what it is worth... I got it all figured out.

The ZTE MBIM TID FSM is broken and needs some hacks where one resets the TID after turning on the radio or trying to re-register to the network.

However Win 8.1 does handle this correctly; ModemManager seems to have issues since I guess this behaviour is not confirming to the MBIM spec.

Might be that Ben's stack is newer and confirms to the spec.

//M

Den 8 apr 2015 18:38 skrev Markus Gothe <nietzsche at lysator.liu.se>:
>
> I guess he used the MF193M. :-/
> However I think the problem is contrary to MM that I am trying to keep track on the TIDs instead of reading the device's response.
>
> //M
>
> Den 7 apr 2015 19:21 skrev Aleksander Morgado <aleksander at aleksander.es>:
> >
> > On Tue, Apr 7, 2015 at 7:04 PM, Markus Gothe <nietzsche at lysator.liu.se> wrote: 
> > > Finally got the Beeline MBIM fw for ZTE MF823 working (thx to vve.su's ADB hack). 
> > > 
> > > However it beats me that modemmanager does not like this device... Windows does. Windows works. But neither modemmanager nor mbim-network does cope with this MBIM stack. 
> > > Seems like the ZTE MBIM stack have issues with handling transaction IDs(!?)... 
> > > 
> >
> > I vaguely remember some issue with transaction ids in some mbim modem, 
> > but don't recall if that was a zte modem... 
> >
> > > Is this a known issue? Which fw has been at hand when adding the ZTE MBIM support to MM??? 
> > > 
> >
> > Ben, which device were you testing? 
> >
> > commit 5d2f15041bb17b1c6108632b862a5cfba4d76826 
> > Author: Ben Chan <benchan at chromium.org> 
> > Date:   Tue Feb 11 23:31:31 2014 -0800 
> >     zte: allow MBIM devices 
> >
> >
> >
> >
> > -- 
> > Aleksander 
> > https://aleksander.es 
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