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