Qualcomm Snapdragon X7 LTE on SUSE (SLES) 15 on Dell Latitude 7490

Hello all!

I am venturing into SUSE Linux and I am liking my stay so far. I have a Dell Latitude 7490 with a Qualcomm Snapdragon X7 LTE card installed. I have a Google Fi data-only SIM inserted and I’m trying to get things to work.

Now, I had this working somehow yesterday. After putting my device asleep and waking it back up, the device seems to have disappeared and I cannot get it to work again. Sadly, I don’t know what exact steps I took to get it working in the first place as I was shotgun-debugging at that point (bad bad practice!).

I’ll give you all some output of what I got.

From the command ‘usb-devices’ I was able to see my modem:


T:  Bus=02 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  2 Spd=5000 MxCh= 0
D:  Ver= 3.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 9 #Cfgs=  1
P:  Vendor=413c ProdID=81c2 Rev=00.06
S:  Manufacturer=Sierra Wireless, Incorporated
S:  Product=DW5811e Snapdragon™ X7 LTE
S:  SerialNumber=LF83558196021024
C:  #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=504mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
I:  If#=12 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim
I:  If#=13 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
I:  If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
I:  If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)

Within ModemManager (I have the service enabled via systemctl) I get the following status:


● ModemManager.service - Modem Manager
   Loaded: loaded (/usr/lib/systemd/system/ModemManager.service; enabled; vendor preset: enabled)
   Active: active (running)
 Main PID: 1331 (ModemManager)
    Tasks: 3 (limit: 4915)
   CGroup: /system.slice/ModemManager.service
           └─1331 /usr/sbin/ModemManager


Apr 02 06:53:44 linux-4er5 ModemManager[1331]: spawning new mbim-proxy (try 1)...
Apr 02 06:53:44 linux-4er5 ModemManager[1331]: [/dev/cdc-wdm0] Read max control message size from descriptors file: 4096
Apr 02 06:54:01 linux-4er5 ModemManager[1331]: <info>  Creating modem with plugin 'Generic' and '1' ports
Apr 02 06:54:01 linux-4er5 ModemManager[1331]: <warn>  Could not grab port (tty/ttyS4): 'Cannot add port 'tty/ttyS4', unhandled serial type'
Apr 02 06:54:01 linux-4er5 ModemManager[1331]: <warn>  Couldn't create modem for device at '/sys/devices/pci0000:00/0000:00:16.3': Failed to find primary AT port
Apr 02 06:54:14 linux-4er5 ModemManager[1331]: proxy configuration failed: closed
Apr 02 06:54:14 linux-4er5 ModemManager[1331]: [/dev/cdc-wdm0] channel destroyed
Apr 02 06:54:14 linux-4er5 ModemManager[1331]: <info>  Creating modem with plugin 'Dell' and '2' ports
Apr 02 06:54:14 linux-4er5 ModemManager[1331]: <warn>  Could not grab port (usbmisc/cdc-wdm0): 'Cannot add port 'usbmisc/cdc-wdm0', unsupported'
Apr 02 06:54:14 linux-4er5 ModemManager[1331]: <warn>  Couldn't create modem for device at '/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2': Failed to find primary AT port

Seems odd! So I checked my installed modem devices with ‘mmcli -L’:

No modems were found.

At this point I am a bit at a loss. When I had it working, the modem showed up under mmcli as it should. It’s almost like the device went into some low power state that screwed everything up. I have tried plugging in the laptop and rebooting the laptop while plugged in with no success.

For more info, here are some more outputs:
‘lsusb’:


Bus 002 Device 003: ID 413c:81c2 Dell Computer Corp. 
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 0c45:6717 Microdia 
Bus 001 Device 004: ID 0a5c:5832 Broadcom Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

‘lspci’:


00:00.0 Host bridge: Intel Corporation Device 5914 (rev 08)
00:02.0 VGA compatible controller: Intel Corporation Device 5917 (rev 07)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 08)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21)
00:15.1 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 (rev 21)
00:15.2 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #2 (rev 21)
00:15.3 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #3 (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
00:16.3 Serial controller: Intel Corporation Device 9d3d (rev 21)
00:17.0 RAID bus controller: Intel Corporation 82801 Mobile SATA Controller [RAID mode] (rev 21)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 (rev f1)
00:1c.2 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #3 (rev f1)
00:1c.4 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 (rev f1)
00:1f.0 ISA bridge: Intel Corporation Device 9d4e (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (4) I219-LM (rev 21)
01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01)
02:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)

‘lshw -C network’:


  *-network                 
       description: Wireless interface
       product: Wireless 8265 / 8275
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: wlan0
       version: 78
       serial: 18:56:80:4c:89:98
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=4.12.14-150.14-default firmware=34.0.1 ip=192.168.10.236 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:124 memory:ec000000-ec001fff
  *-network
       description: Ethernet interface
       product: Ethernet Connection (4) I219-LM
       vendor: Intel Corporation
       physical id: 1f.6
       bus info: pci@0000:00:1f.6
       logical name: eth0
       version: 21
       serial: e4:b9:7a:5c:fd:49
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k firmware=0.1-4 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:128 memory:ec200000-ec21ffff
  *-network DISABLED
       description: Ethernet interface
       physical id: 2
       logical name: wwan0
       serial: 02:3d:4a:58:9b:f3
       capabilities: ethernet physical
       configuration: broadcast=yes driver=cdc_mbim driverversion=22-Aug-2005 firmware=CDC MBIM link=no multicast=yes

‘rfkill list all’


0: dell-wifi: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: dell-bluetooth: Bluetooth
    Soft blocked: yes
    Hard blocked: no
2: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

‘ls /dev/cdc*’

/dev/cdc-wdm0

Any help would be appreciated. Thanks!

SUSE (SLES) is not the same as openSUSE. They are related, but they are not the same. So you are in the wrong place. Use SUSE Forums, where people will have more experience with your system.

Thanks! I have posted the same question on the SUSE forum for anyone else that may run across this.