x86 goldenorb EM7565 and Simple Mobile

[jasonh]

All,

This could get a bit confusing with all of the various pieces and parts. However, I have a Proxmox VM of x86 goldenorb built on OpenWRT 19.07.2. I have an EM7565 in a USB 3.0 enclosure and I'm passing that USB device to the goldenorb VM.
I've tutorial'd my way through most of this and have the modem recognized and can send AT commands, etc.
I'm on Simple Mobile. SIM was activated, and though I don't have a phone to test it in, it appears that I'm connected (I could be dead wrong here). But I am showing "Normal Service" from AT!GSTATUS?:

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AT!GSTATUS?
!GSTATUS:
Current Time:  1975	Temperature: 26
Reset Counter: 1		Mode:        ONLINE
System mode:   LTE              PS state:    Attached
LTE band:      B66              LTE bw:      5 MHz
LTE Rx chan:   0                LTE Tx chan: 132547
LTE SSC1 state:NOT ASSIGNED
LTE SSC2 state:NOT ASSIGNED
LTE SSC3 state:NOT ASSIGNED
LTE SSC4 state:NOT ASSIGNED
EMM state:     Registered       Normal Service
RRC state:     RRC Idle
IMS reg state: No Srv
PCC RxM RSSI:  -77              PCC RxM RSRP:  -98
PCC RxD RSSI:  -84              PCC RxD RSRP:  -105
Tx Power:      --               TAC:         b0f9 (45305)
RSRQ (dB):     -7.2             Cell ID:     00775a20 (7821856)
SINR (dB):     26.0
OK  

I'm unable to connect out over the wwan, though. Checking ifconfig I have nothing by RX/TX errors on wwan0. As well, I have non-stop messages of:

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cdc_mbim 2-1:1.12 wwan0:kevent 1 may have been dropped
cdc_mbim 2-1:1.12 wwan0:kevent 0 may have been dropped

I'm hoping someone here will be able to point me in the right direction. Here's some more info I can provide that may be beneficial:

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AT+CGDCONT?                                                                                                                                                                                                        +CGDCONT: 1,"IPV4V6","simple","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0 

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AT!BAND?
Index, Name
09, LTE ALL

[Didneywhorl]

RRC state: RRC Idle
IMS reg state: No Srv

This part right here says you may want to put the SIM in a phone first and verify it's getting internet. I've seen this before I believe.


I could be wrong but I think it says, you connected to the tower, but you are denied.

[jasonh]

Doh! Looks like I'll have to track down a compatible phone.

[jasonh]

Alright, I was able to get the SIM in a phone. Made a couple calls, visited a couple websites, ran speed test, watched a youtube video...
Popped the SIM back into the USB 3.0 enclosure and I'm at the same spot as before.

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EMM state:	Registered	Normal Service
RRC state:     RRC Idle
IMS reg state: No Srv 

Any other pointers?

I've got the APN as:

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simple

But, under Modem > Network Status > General Information it's showing:

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Modem:	Sierra Wireless, Incorporated EM7565
Modem ID:	1199 : 9091
Provider:	HOME
Comm Port:	/dev/ttyUSB1
Temperature:	26.00°C
Protocol:	MBIM

The "HOME" part looks curious, and I think I've seen that as an issue in another post about Simple Mobile.

[jasonh]

Alright, I put the EM7565 in QMI with:

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AT!USBCOMP=1,3,10D

RRC state shows:

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RRC Connected

I can now ping out. I'm too new to this part of things to understand exactly the reasons behind MBIM vs. QMI, but evidently the EM7565 wasn't happy without QMI.

[BillA]

Alright, I was able to get the SIM in a phone. Made a couple calls, visited a couple websites, ran speed test, watched a youtube video...
Popped the SIM back into the USB 3.0 enclosure and I'm at the same spot as before.
The "HOME" part looks curious, and I think I've seen that as an issue in another post about Simple Mobile.

Make sure to set the TTL to either 64 or 65. Try both, because only one of those values will work without using hotspot data, which you will find out as soon as you have used up the first 5gigs of data. If it stops with 64 after a while, just change it to 65.

[Didneywhorl]

I can now ping out. I'm too new to this part of things to understand exactly the reasons behind MBIM vs. QMI, but evidently the EM7565 wasn't happy without QMI.

I overlooked that bit. Sierra created the QMI protocol I think. Their modems seem to work much better in QMI. I wouldnt think that MBIM wouldn't work though.

AS BillA stated, make sure you set the TTL values.

[jasonh]

Doing all good with QMI and TTL at 65. Didn't have to set up mangle, as no hotspot data usage is showing. So, despite everything not being in its final location (I'm moving at the end of the month) connection seems to be doing alright.

I do notice that the EM7565 is showing USB 3.0 speeds in the hypervisor:

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cat /sys/kernel/debug/usb/devices

shows:


But, in the goldenorb VM I'm getting USB 2.0 speeds:


Checking

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AT!USBSPEED?

Shows:

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SUPPORTED:Super-Speed
CURRENT:High-Speed

I've set it as:

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AT!USBSPEED=1

But, from my understanding that's just setting the maximum supported speed (Which is already correct).

I'm willing to bet that it's a difference in the kernels and the drivers being used. It's sort of evidenced in the "Driver=qcserial" portion of the goldenorb output.

Just not sure if anyone has run into this before, and exactly what the fix might be.

[Didneywhorl]

Odd. So goldenorb is detecting the usb2 bus but your shell commands show the device in usb3? It may likely be your vm interface. Are you using docker?

[jasonh]

I'm using a Proxmox kvm. I doubt that I'll come anywhere near needing 3.0 speeds. So it isn't high on the priority list right now. Just odd that it's not defaulting to 3.0 on both.

The kernel versions are pretty different between the two, and I'm sure that plays a role.