Hi Bjørn, On 10/03/16 18:39, Bjørn Mork wrote: > Andreas Fett <andreas.f...@secunet.com> writes: >> I still have to load the mbim_module manually and sometimes I'm able to >> "talk" to it. I have no clue which factors lead to success or failure here. > > Huh? Why do you need to load cdc_mbim manually? Doesn't it autoload > when the modem is switched to the MBIM configuration? Or is the probe > failing at this time? The autoload works just fine. It's just that the xhci module is loaded in the initramfs where the cdc_mbim module is not available and I disabled the "udevadm trigger" later on to prevent interference of other modules.
> Well, a couple of more things to try out if you are able to connect > again: > > 1) move the NDP > > With a v4.5 kernel you will have a "ndp_to_end" sysfs attribute. Try > toggling it on and see if that makes any difference: > > echo Y >/sys/class/net/wwan0/cdc_ncm/ndp_to_end > > You can do this after connecting if you want to. The driver will enable > it immediately for the rest of the session. I had one boot now where the modem responded and this actually made it fully functional, that is I could get a ping across it after connecting and assigning the ip address. > 2) DHCP > > You should also try using a DHCP client instead of manual IP > configuration. Some firmwares can be a bit difficult about this, > although I don't think we have seen that with MBIM yet. Mostly worth > trying because it is easy to test. Not really believing it will work :) When the modem responds I can do dhcp on it. I then get the same address information ModemManager reports. I'm not sure if this is required though. To sum up, when the modem comes to a state where it will respond to mbimcli --query-device-caps it seems to be operational (after setting the cdc_ncm sysctl). If I can't talk to it using mbimcli it's just totally silent and it seems to me that only a cold reset (as opposed to a reboot) will get it out of that state. However up to now its only about one in ten boots (using the same image) where this works. Andreas
signature.asc
Description: OpenPGP digital signature
_______________________________________________ ModemManager-devel mailing list ModemManager-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
