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" <bj...@mork.no>
> 发送时间: 2017-11-23 16:38:25 (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:
>
> > 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.
>
> 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
