Help on an invalid modem case

[Dan Williams]

On Wed, 2020-08-12 at 12:10 +0000, Louis-Alexis Eyraud wrote:
> Hi Aleksander,
> 
> cool that the setup has been useful for your debugging 🙂
> I have 4 other Huawei models (3 of them are E352 variants) and an
> Alcatel.  I will test your branch this afternoon with these modems
> and give you some feedback.

I'll test the branch this week with my devices as well. I thought I had
a 352 somewhere, but it's hard to keep all their model numbers
straight.
Dan

> Louis-Alexis
> ________________________________
> From: Aleksander Morgado <aleksander at aleksander.es>
> Sent: 12 August 2020 13:33
> To: Louis-Alexis Eyraud <louis-alexis.eyraud at sigfox.com>
> Cc: ModemManager (development) <
> modemmanager-devel at lists.freedesktop.org>
> Subject: Re: Help on an invalid modem case
> 
> Hey Louis-Alexis,
> 
> > sorry for the delay, I was on holiday the past weeks.
> > I've retrieved the "faulty" 3G modem device from my office. For
> > information, the exact model is Huawei e352u-21 (other e352
> > variants I tested do not seem to provoke the issue).
> > 
> > I did a more standard setup at home to reproduce it: a RPI3 with
> > Raspbian, ModemManager compiled from sources and various system
> > configuration tweaks to force broadband management.
> > The setup also allowed me to verify that in CDC mode, it does not
> > appear.
> > 
> > If you need to do some debug or test a fix for any of the two bugs
> > you opened, feel free to contact me privately to give you access to
> > this setup.
> > 
> 
> Thanks for the access to your remote setup, that was very helpful.
> 
> I've prepared a branch with several changes, including a big
> GETPORTMODE logic upgrade:
> https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitlab.freedesktop.org%2Fmobile-broadband%2FModemManager%2F-%2Fmerge_requests%2F335&data=02%7C01%7Clouis-alexis.eyraud%40sigfox.com%7Cbacaf731dae04aa2223b08d83eb39687%7Cfcbc8bb1061e4b949f703ad917b0c8d3%7C0%7C0%7C637328288328929987&sdata=dniU3Yh%2BUKCJc6jOMC02yfRLPI50MX0uWUBpsGzEP2k%3D&reserved=0
> 
> This branch should solve the issues you had in the E352, please
> confirm. Also, if you can test the branch yourself with additional
> Huawei devices, it would be nice (please grab debug logs while doing
> so just in case).
> 
> --
> Aleksander
> https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Faleksander.es%2F&data=02%7C01%7Clouis-alexis.eyraud%40sigfox.com%7Cbacaf731dae04aa2223b08d83eb39687%7Cfcbc8bb1061e4b949f703ad917b0c8d3%7C0%7C0%7C637328288328929987&sdata=t%2B9zWk5LtyqymKSw83hk8xEDEFcCXOqkf3sSGPDGvlQ%3D&reserved=0
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