Fibocom L850-GL / Intel XMM7360

[Wassenberg, Dennis]

Hi Bjørn,

your comment makes me digging deeper in why this modem can not working in both modes.

I installed native Windows on the target device and tried to make this modem running in native Windows. There I saw that
after using the modem the first time Windows issued a firmware update of that modem. After that firmware version
18500.5001.00.03.25.24 was installed.

Now switching back to Xubuntu 20.04 I tried the usb approach once again. Now the usb switch worked in general. The modem
was available at the USB bus but it was not possible to get a connection because of the issues described in 
https://github.com/xmm7360/xmm7360-usb-modeswitch and https://github.com/xmm7360/xmm7360-usb-modeswitch/issues/23

After that I booted native Windows once again and installed an older firmware version. I did this by forcing installing
an older driver and modified the FWUpdater config file a bit.
https://download.lenovo.com/pccbbs/mobiles/nz3wj22w.exe

After that I had firmware version 18500.5001.00.01.20.86 running.

Using this firmware version it was it was possible to get a connection in Xubuntu 20.04 using the usb switch.

So, it looks like that directly after this devices leaves the factory there is just a bootloader firmware installed and
no "productive" firmware.

Using the PCIe mode it was still not possible to get it running with https://github.com/xmm7360/xmm7360-pci. The kernel
driver can attach to the device successfully now but the python script failed.

Thank you & best regards,

Dennis






On Mon, 2020-06-22 at 11:05 +0200, Bjørn Mork wrote:
> "Wassenberg, Dennis" <Dennis.Wassenberg at secunet.com> writes:
> 
> > I tested the PCI approach.
> > 
> > Unfortunately I had no luck. The kernel PCI driver at
> > https://github.com/xmm7360/xmm7360-pci can not initiale the modem
> > correctly. The modem stays at status=0xfeedb007. This seems to mean
> > that the modem is (still) booting. After 20 seconds probing fails. The
> > kernel driver gives up waiting for the device to boot.
> 
> Strange.  That sounds similar to the USB experience.
> 
> Maybe the issue preventing it from booting up in USB mode isn't related
> to USB after all?  Maybe there is a problem with the installed firmware?
> Did you confirm that this specific test device actually works?  Or did
> you test multiple modems with the same behaviour?
> 
> 
> Bjørn