I use dmesg to view the system message, and get these informations as below,
[ 1535.372130] usb 1-6: new high-speed USB device number 8 using xhci_hcd [ 1535.378889] thinkpad_acpi: unknown possible thermal alarm or keyboard event received [ 1535.378893] thinkpad_acpi: unhandled HKEY event 0x60b0 [ 1535.378894] thinkpad_acpi: please report the conditions when this event happened to ibm-acpi-de...@lists.sourceforge.net [ 1535.513304] usb 1-6: New USB device found, idVendor=1199, idProduct=9078 [ 1535.513308] usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1535.513310] usb 1-6: Product: Sierra Wireless EM7455 Qualcomm [ 1535.513312] usb 1-6: Manufacturer: Sierra Wireless, Incorporated [ 1535.513313] usb 1-6: SerialNumber: LF72567821041020 [ 1535.513996] qcserial 1-6:1.0: Qualcomm USB modem converter detected [ 1535.514212] usb 1-6: Qualcomm USB modem converter now attached to ttyUSB0 [ 1535.515015] usb 1-6: USB disconnect, device number 8 [ 1535.515330] qcserial ttyUSB0: Qualcomm USB modem converter now disconnected from ttyUSB0 [ 1535.515356] qcserial 1-6:1.0: device disconnected [ 1536.014626] thinkpad_acpi: unknown possible thermal alarm or keyboard event received [ 1536.014628] thinkpad_acpi: unhandled HKEY event 0x60b1 [ 1536.014629] thinkpad_acpi: please report the conditions when this event happened to ibm-acpi-de...@lists.sourceforge.net [ 1536.524163] usb 1-6: new high-speed USB device number 9 using xhci_hcd [ 1536.665054] usb 1-6: config 1 interface 0 altsetting 0 bulk endpoint 0x1 has invalid maxpacket 64 [ 1536.665058] usb 1-6: config 1 interface 0 altsetting 0 bulk endpoint 0x81 has invalid maxpacket 64 [ 1536.665988] usb 1-6: New USB device found, idVendor=1199, idProduct=9078 [ 1536.665992] usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1536.665994] usb 1-6: Product: Sierra Wireless EM7455 Qualcomm [ 1536.665996] usb 1-6: Manufacturer: Sierra Wireless, Incorporated [ 1536.665998] usb 1-6: SerialNumber: LF72567821041020 [ 1536.666822] usb 1-6: USB disconnect, device number 9 [ 1544.686163] thinkpad_acpi: unknown possible thermal alarm or keyboard event received [ 1544.686167] thinkpad_acpi: unhandled HKEY event 0x60b0 [ 1544.686168] thinkpad_acpi: please report the conditions when this event happened to ibm-acpi-de...@lists.sourceforge.net [ 1553.785361] usb 1-6: new high-speed USB device number 11 using xhci_hcd [ 1553.926371] usb 1-6: New USB device found, idVendor=1199, idProduct=9078 [ 1553.926390] usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1553.926392] usb 1-6: Product: Sierra Wireless EM7455 Qualcomm [ 1553.926394] usb 1-6: Manufacturer: Sierra Wireless, Incorporated [ 1553.926395] usb 1-6: SerialNumber: LF72567821041020 [ 1553.926986] qcserial 1-6:1.0: Qualcomm USB modem converter detected [ 1553.927112] usb 1-6: Qualcomm USB modem converter now attached to ttyUSB0 [ 1553.928024] usb 1-6: USB disconnect, device number 11 [ 1553.928258] qcserial ttyUSB0: Qualcomm USB modem converter now disconnected from ttyUSB0 [ 1553.928275] qcserial 1-6:1.0: device disconnected [ 1554.937425] usb 1-6: new high-speed USB device number 12 using xhci_hcd [ 1555.078351] usb 1-6: config 1 interface 0 altsetting 0 bulk endpoint 0x1 has invalid maxpacket 64 [ 1555.078354] usb 1-6: config 1 interface 0 altsetting 0 bulk endpoint 0x81 has invalid maxpacket 64 [ 1555.079241] usb 1-6: New USB device found, idVendor=1199, idProduct=9078 [ 1555.079245] usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 1555.079247] usb 1-6: Product: Sierra Wireless EM7455 Qualcomm [ 1555.079249] usb 1-6: Manufacturer: Sierra Wireless, Incorporated [ 1555.079250] usb 1-6: SerialNumber: LF72567821041020 [ 1555.080269] usb 1-6: USB disconnect, device number 12 That is to say, the device Sierra Wireless EM7455 is connected and disconnected frequently. It should be a problem of something. But I do not known what it is. This device worked fine before Oct 29. > -----原始邮件----- > 发件人: "Bjørn Mork" <bj...@mork.no> > 发送时间: 2017-11-23 15:48:10 (星期四) > 收件人: wg...@china.com > 抄送: debian-laptop@lists.debian.org > 主题: Re: Does not Debian support mobile broadband anymore? > > wg...@china.com writes: > > > Hi, everyone, > > > > Since my Debian testing was upgraded on Oct 29, the mobile broadband in my > > laptop could not be used. The mobile broadband is missing in the > > network-manager UI, and wvdialconf can not configure the broadband either. > > The message of wvdialconf is as below, > > > > ********************************************** > > Editing `/etc/wvdial.conf'. > > > > Scanning your serial ports for a modem. > > > > ttyS0<*1>: ATQ0 V1 E1 -- failed with 2400 baud, next try: 9600 baud > > ttyS0<*1>: ATQ0 V1 E1 -- failed with 9600 baud, next try: 115200 baud > > ttyS0<*1>: ATQ0 V1 E1 -- and failed too at 115200, giving up. > > Modem Port Scan<*1>: S1 S2 S3 > > WvModem<*1>: Cannot get information for serial port. > > ttyUSB0<*1>: ATQ0 V1 E1 -- [01] > > ttyUSB0<*1>: failed with 2400 baud, next try: 9600 baud > > ttyUSB0<*1>: ATQ0 V1 E1 -- [01] > > ttyUSB0<*1>: failed with 9600 baud, next try: 9600 baud > > ttyUSB0<*1>: ATQ0 V1 E1 -- [01] > > ttyUSB0<*1>: and failed too at 115200, giving up. > > ttyS0 is not your modem, and ttyUSB0 is either the EM7455 DIAG port or > firmware upgrade port, depending on modem state. So this result from > wvdialconf is expected. Don't know the first thin about wvdial... > > Please provide some useful info instead: > > lsusb -v > will tell you whether the modem is detected and has booted properly, and > also which mode it is configured for. > > mmcli -L > will show you a list of modems detected by modemmanger > > mmcli -m X, where X is an index from the above list > will show you more details on the specific modem > > > Further debug steps depend on the results of these commands. You might > want to look at the generic ModemManager debug steps: > https://www.freedesktop.org/wiki/Software/ModemManager/Debugging/ > > > > Bjørn
