Yes, as you say, after the changing of this device, the mobile broadband works again. It is a problem of the device. Thank you very much!
> -----原始邮件-----
> 发件人: "Bjørn Mork" <[email protected]>
> 发送时间: 2017-11-23 20:30:18 (星期四)
> 收件人: [email protected]
> 抄送: [email protected]
> 主题: Re: Does not Debian support mobile broadband anymore?
>
> Yes, this is expected. As I said: 1199:9078 is a booloader mode. This mode is
> normally only visible in two situations:
>
> 1) when upgrading firmware
> 2) when the firmware fails to boot
>
> Your case is numer 2. The booloader will try to boot the modem firmware
> a few times (seen as multiple connect+disconnect events) and then enter
> a failsafe/debug mode. There is only a single USB interface available
> in this mode, as you can see from your lsusb output. This is a serial
> function which is handled by the same driver that will handle the normal
> modem serial function, making it appear to the system as typically
> /dev/ttyUSB0. But there is *no modem* related function there. Only a
> Qualcomm or Sierra Wireless bootloader debug function, speaking the
> SAHARA protocol.
>
> As I said: Please verify that the modem works on any other OS if you
> can. Downgrade your Debian install if you believe that will help. If it
> doesn't, then you should assume that the firmware or NVRAM on this modem
> is damaged. This is most likely a warranty repair since this is a rather
> new laptop. You should therefore contact Lenovo support.
>
>
> Bjørn
>
> [email protected] writes:
>
> > Sometimes, the device Sierra Wireless EM7455 is connected success, and run lsusb, mmcli -L, their output is below. No any modem is found.
> >
> > lsusb -v
> > ************************************************************************
> > Bus 001 Device 009: ID 1199:9078 Sierra Wireless, Inc.
> > Couldn't open device, some information will be missing
> > 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 0x9078
> > bcdDevice 0.00
> > iManufacturer 1
> > iProduct 2
> > iSerial 3
> > bNumConfigurations 1
> > Configuration Descriptor:
> > bLength 9
> > bDescriptorType 2
> > wTotalLength 32
> > bNumInterfaces 1
> > bConfigurationValue 1
> > iConfiguration 0
> > bmAttributes 0x80
> > (Bus Powered)
> > MaxPower 2mA
> > 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
> > *****************************************************************************
> >
> > mmcli -L
> > ************************************
> > No modems were found
> > ************************************
> >
> >
> >> -----原始邮件-----
> >> 发件人: "Bjørn Mork" <[email protected]>
> >> 发送时间: 2017-11-23 16:38:25 (星期四)
> >> 收件人: [email protected]
> >> 抄送: [email protected]
> >> 主题: Re: Does not Debian support mobile broadband anymore?
> >>
> >> [email protected] writes:
> >>
> >> > 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 [email protected]
> >> > [ 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 [email protected]
> >> > [ 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 [email protected]
> >> > [ 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.
> >>
> >> This is the problem, but I don't it is related to Debian versions in any
> >> way.
> >>
> >> The modem seems to be constantly resetting. I expect it eventually
> >> settles when the (modem) bootloader failsafe mode kicks in. But it will
> >> then probably be in a debug mode.
> >>
> >> Notice that the device ID is 1199:9078 all the way. This is the
> >> bootloader ID. The application ID is 1199:9079. If you have older logs
> >> from when the modem worked, then I am pretty sure you'll see that ID
> >> instead.
> >>
> >> I'm afraid there is little which can be done about this on an OS level,
> >> unless the root cause is some platform (Lenovo) specific issue which
> >> triggers the modem boot failure. My advice would be to test this with
> >> another OS, if possible, and then contact Lenovo support if it fails
> >> there as well.
> >>
> >>
> >>
> >> Bjørn
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