On Fri, 2022-01-14 at 16:29 +0100, Aleksander Morgado wrote: > Hey Peter, > > On Fri, Jan 14, 2022 at 4:14 PM Peter Naulls <pe...@chocky.org> > wrote: > > > > On 1/14/22 10:09 AM, Aleksander Morgado wrote: > > logic is not going to change. > > > > > > If MM detects a single TTY port, it's going to default to use > > > PPP. > > > It's not a fallback to PPP, it's using whatever it has for data > > > connection, if PPP is the only way forward, PPP will be. > > > > I don't want PPP, ever. I don't know how many times I can repeat > > that. Please stop saying this and arguing with me about it. > > > > I know you don't want PPP in your setup, you have made that clear. > I'm > not arguing with you about that. I get it. You don't want PPP.
Yeah, MM has to work for a lot of people, some who want PPP and many who don't. But there's still enough PPP going around that it must continue to be supported for a while. > > Now, the way to fix that should be by making sure ModemManager gets > notified of the QMI/NET port before it creates a modem object only > with TTY ports. I understand that you don't like this approach, but > ModemManager doesn't receive a fixed list of ports to work with, as > many other modem management setups. MM tries to dynamically adjust to > what it finds, and that is a core feature of ModemManager that is not > going to change. In the past IIRC we've seen bad udev rules or scripts taking multiple seconds to evaluate or do something (I think usb_modeswitch was a problem here once upon a time) and delaying updates for specific ports of a device. Not sure if that's a problem here, or if the system is just slow. > > So again, and don't hate me for repeating this, if MM gets notified > of > one single AT capable TTY port and nothing else, it will default to > use PPP. If you don't like that, please patch your ModemManager to > fit > your needs. Or try moving to uqmi, which requires you to specify > which > is the cdc-wdm port path explicitly, although that approach has its > own problems, but maybe not the ones you're worried about. I haven't read the whole thread in detail, so forgive me if this was covered. Perhaps a way of tagging a modem/driver/whatever with "never use PPP" would be workable. Off by default of course. Dan
