<div dir="ltr"><div>Thanks, Lars.<br></div><div><br></div><div>I looked up and found this <a href="https://github.com/raspberrypi/firmware/issues/582">https://github.com/raspberrypi/firmware/issues/582</a></div><div><br></div><div>So I should be able to use up to 6 modems before I ran into this issue if I'm not mistaken.<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Em ter., 28 de set. de 2021 às 07:58, Lars Melin <<a href="mailto:larsm17@gmail.com">larsm17@gmail.com</a>> escreveu:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On 9/28/2021 02:24, Lucas Pelegrino wrote:<br>
<br>
> This modem works when I connect it by itself. I also tested<br>
> different permutations and it seems it’s always the third modem that> <br>
can’t get a connection, independently of which one I put on first.<br>
> This is the full log with debug on: <a href="https://pastebin.com/L3QWBppt" rel="noreferrer" target="_blank">https://pastebin.com/L3QWBppt</a><br>
> <<a href="https://pastebin.com/L3QWBppt" rel="noreferrer" target="_blank">https://pastebin.com/L3QWBppt</a>><br>
><br>
> Any ideas?<br>
><br>
<br>
Your host controller has a limit of 16 hostchannels (see <br>
/drivers/usb/dwc2/core.h) which means that it can only handle 16 <br>
endpoints at a time.<br>
Your hardware is a Raspberry Pi and it is using an out-of-tree kernel <br>
driver (dwc_otg) which is known to be extremely buggy, one of many bugs <br>
is that it takes long time for it to release a hostchannel that is not <br>
in use.<br>
<br>
cheers<br>
Lars<br>
<br>
<br>
<br>
</blockquote></div>