Hey! On Wed, Aug 8, 2018 at 6:34 AM, Daniel Wood <[email protected]> wrote: > I have been given a Fibocom L850-GL that seems to be stuck in NCM mode. > As I have not had any luck changing the mode back to MBIM: > ModemManager[25270]: <debug> [1533696762.104669] (ttyACM0): --> > 'AT+GTUSBMODE?<CR>' > ModemManager[25270]: <debug> [1533696762.121517] (ttyACM0): <-- > '<CR><LF>+CME ERROR: 4<CR><LF>' > ModemManager[25270]: <debug> [1533696831.512880] (ttyACM0): --> > 'AT+GTUSBMODE=2<CR>' > ModemManager[25270]: <debug> [1533696831.530829] (ttyACM0): <-- > '<CR><LF>+CME ERROR: 4<CR><LF>' > > I figured I would try to see how it works under the latest version of > ModemManager, but as soon as you try to actually connect to the internet, > the serial port locks up. Now, given the state of this modem, it may have > nothing to do with ModemManager. Since it may possibly or this may assist in > adding support for these Intel XMM based chipsets, I have collected all the > information I could think of to make it available to you guys, including > debug logs and bus trees. > > [85855.509892] usb 2-1.5: New USB device found, idVendor=8087, > idProduct=07f5 > [85855.509896] usb 2-1.5: New USB device strings: Mfr=0, Product=0, > SerialNumber=0 > [85856.714197] usb 2-1.5: USB disconnect, device number 43 > [85861.288570] usb 2-1.5: new high-speed USB device number 44 using ehci-pci > [85861.405658] usb 2-1.5: New USB device found, idVendor=8087, > idProduct=095a > [85861.405662] usb 2-1.5: New USB device strings: Mfr=1, Product=2, > SerialNumber=3 > [85861.405665] usb 2-1.5: Product: MODEM + 2 CDC-ACM + 3 CDC-NCM + SS > [85861.405667] usb 2-1.5: Manufacturer: Intel Corp. > [85861.405669] usb 2-1.5: SerialNumber: 004999010640000 > > > It is 3000+ lines of info, so I created a Gist: > https://gist.github.com/danielewood/1022919b7547c50fb514a652aa3ec1f3 > > Let me know if there is any other information that is needed and I'll pull > it. Also, I can create a temporary linux install on a junk USB drive and > provide you with remote ssh access to the machine if someone wants to have > full access and do whatever they want. The broadband plan is unlimited, so > I'm not at all worried bandwidth use. > > I also decided to compile ModemManager from the git master branch, those > results are at the end of the page. >
I'm currently working on improving the L850-GL support within ModemManager, but I was only focusing in the MBIM setup, not in the NCM one. Parts of the plugin provide AT-based features even for the MBIM mode (e.g. mode/band switching with AT+XACT) so those could be reused. We don't have NCM support for Intel XMM based devices yet... we have a staging "infineon" plugin with some support to start the data connection over the NCM, but we never got to test it properly so it's not in git master yet. I assume that as soon as you connect the modem it runs in PPP mode, and that is why you lose the AT port, but this device should have 2 AT ports, doesn't it? -- Aleksander https://aleksander.es _______________________________________________ ModemManager-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
