<html> <head> </head> <body class='hmmessage'><div dir='ltr'> <style></style> <div dir="ltr"> Hello: I'm a newbie to 3G modems on Linux, using libqmi-1.8 to control a Sierra MC7354 mini-PCI modem in an embarked system (Ubuntu 14.04.2LTS, 3.16 kernel). NetworkManager starts a 3GPP connection using this hardware, and I can get an IP and test ping ok. But it takes a couple of minutes to re-establish connection when signal is lost after is received again. I´d like to use libqmi and not Network-Manager to detect and handle this situation faster, and easily . I can´t wait two minutes to recover from this on an embarked system and it seems libqmi goes faster for this. But if I disable NetworkManager in my Linux boot, and I do a simple qmi-network /dev/cdc_wdm0 start it blocks on DHCP acquisition: # ./utils/qmi-network /dev/cdc-wdm0 start Loading profile... APN: myapn.com Starting network with 'qmicli -d /dev/cdc-wdm0 --wds-start-network=myapn.com --client-no-release-cid'... Saving state... (CID: 8) Saving state... (PDH: 1205839304) Network started successfully ---> Is OK...but... #ifup wwan0 Internet Systems Consortium DHCP Client 4.2.4 Copyright 2004-2012 Internet Systems Consortium. All rights reserved. For info, please visit <a href="https://www.isc.org/software/dhcp/">https://www.isc.org/software/dhcp/</a> Listening on LPF/wwan0/96:49:7d:1c:8b:67 Sending on LPF/wwan0/96:49:7d:1c:8b:67 Sending on Socket/fallback DHCPDISCOVER on wwan0 to 255.255.255.255 port 67 interval 3 (xid=0x6dc65ce8) ... and it blocks in this DHCP. BUT, if I start NetworkManager (at boot or in any moment), then I STOP it, and do the same again, it works. So...what does NetworkManager do, that correctly initializes my modem, and I can´t do with libqmi ?. Does qmicli initialize the modem? Also, wen using NetworkManager I see lots of CDMA trial an error probes. I´m not going to use CDMA. How can I disable it with libqmi? Could you help me? Thank you ====================================== This are some caracteristics for my system: #lsusb Bus 001 Device 002: ID 1199:68c0 Sierra Wireless, Inc ==================== Minicom on /dev/ttyUSB2 String is: AT!GSTATUS? !GSTATUS: Current Time: 118 Temperature: 38 Bootup Time: 5 Mode: ONLINE System mode: WCDMA PS state: Attached WCDMA band: WCDMA 2100 WCDMA channel: 11413 GMM (PS) state:REGISTERED NORMAL SERVICE ---> Is registered...but fails... MM (CS) state: IDLE NORMAL SERVICE WCDMA L1 state:L1M_PCH_SLEEP LAC: XXXX RRC state: DISCONNECTED Cell ID: XXXXXXXX RxM RSSI C0: -56 RxD RSSI C0: -106 RxM RSSI C1: -106 RxD RSSI C1: -106 OK ========================== #lsusb -v Bus 001 Device 002: ID 1199:68c0 Sierra Wireless, Inc. Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x1199 Sierra Wireless, Inc. idProduct 0x68c0 bcdDevice 0.06 iManufacturer 1 Sierra Wireless, Incorporated iProduct 2 MC7354 iSerial 3 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 220 bNumInterfaces 6 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xe0 Self Powered Remote Wakeup MaxPower 500mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 255 Vendor Specific Subclass bInterfaceProtocol 255 Vendor Specific Protocol iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x01 EP 1 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 2 bAlternateSetting 0 bNumEndpoints 3 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 0 bInterfaceProtocol 0 iInterface 0 ** UNRECOGNIZED: 05 24 00 10 01 ** UNRECOGNIZED: 05 24 01 00 00 ** UNRECOGNIZED: 04 24 02 02 ** UNRECOGNIZED: 05 24 06 00 00 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x000c 1x 12 bytes bInterval 9 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 3 bAlternateSetting 0 bNumEndpoints 3 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 0 bInterfaceProtocol 0 iInterface 0 ** UNRECOGNIZED: 05 24 00 10 01 ** UNRECOGNIZED: 05 24 01 00 00 ** UNRECOGNIZED: 04 24 02 02 ** UNRECOGNIZED: 05 24 06 00 00 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x85 EP 5 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x000c 1x 12 bytes bInterval 9 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x84 EP 4 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x03 EP 3 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 8 bAlternateSetting 0 bNumEndpoints 3 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 255 Vendor Specific Subclass bInterfaceProtocol 255 Vendor Specific Protocol iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x87 EP 7 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x000a 1x 10 bytes bInterval 9 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x86 EP 6 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x04 EP 4 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 10 bAlternateSetting 0 bNumEndpoints 3 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 255 Vendor Specific Subclass bInterfaceProtocol 255 Vendor Specific Protocol iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x89 EP 9 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x000a 1x 10 bytes bInterval 9 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x88 EP 8 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x05 EP 5 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 11 bAlternateSetting 0 bNumEndpoints 3 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 255 Vendor Specific Subclass bInterfaceProtocol 255 Vendor Specific Protocol iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x8b EP 11 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x000a 1x 10 bytes bInterval 9 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x8a EP 10 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x06 EP 6 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 bNumConfigurations 1 Device Status: 0x0000 (Bus Powered) </div> </div></body> </html>