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Tasklist

FS#60374 - [linux] Sierra Wireless EM7455 Qualcomm modem connects and disconnected in a loop

Attached to Project: Arch Linux
Opened by Andrei Gherzan (agherzan) - Wednesday, 10 October 2018, 14:52 GMT
Last edited by Doug Newgard (Scimmia) - Thursday, 18 October 2018, 15:52 GMT
Task Type Bug Report
Category Kernel
Status Assigned
Assigned To Tobias Powalowski (tpowa)
Jan Steffens (heftig)
Architecture x86_64
Severity High
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 0%
Votes 0
Private No

Details

Description:
After the last update, probably due to kernel (4.18.12-arch1-1-ARCH), Sierra Wireless EM7455 Qualcomm modem stopped working. It loops as it follows:

[ 1218.416747] usb 1-2: new high-speed USB device number 106 using xhci_hcd
[ 1218.558159] usb 1-2: New USB device found, idVendor=1199, idProduct=9078, bcdDevice= 0.00
[ 1218.558162] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1218.558164] usb 1-2: Product: Sierra Wireless EM7455 Qualcomm
[ 1218.558165] usb 1-2: Manufacturer: Sierra Wireless, Incorporated
[ 1218.558166] usb 1-2: SerialNumber: LF62075019041013
[ 1218.560446] qcserial 1-2:1.0: Qualcomm USB modem converter detected
[ 1218.560917] usb 1-2: Qualcomm USB modem converter now attached to ttyUSB1
[ 1218.561551] usb 1-2: USB disconnect, device number 106
[ 1218.561722] qcserial ttyUSB1: Qualcomm USB modem converter now disconnected from ttyUSB1
[ 1218.561740] qcserial 1-2:1.0: device disconnected
[ 1219.313713] usb 1-2: new high-speed USB device number 107 using xhci_hcd
[ 1219.453918] usb 1-2: config 1 interface 0 altsetting 0 bulk endpoint 0x1 has invalid maxpacket 64
[ 1219.453932] usb 1-2: config 1 interface 0 altsetting 0 bulk endpoint 0x81 has invalid maxpacket 64
[ 1219.454558] usb 1-2: New USB device found, idVendor=1199, idProduct=9078, bcdDevice= 0.00
[ 1219.454571] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1219.454579] usb 1-2: Product: Sierra Wireless EM7455 Qualcomm
[ 1219.454587] usb 1-2: Manufacturer: Sierra Wireless, Incorporated
[ 1219.454594] usb 1-2: SerialNumber: LF62075019041013
[ 1219.462168] usb 1-2: USB disconnect, device number 107



Additional info:
* package version(s)
modemmanager 1.8.2-1
networkmanager 1.14.1dev+13+g0d3234478-1
linux 4.18.12.arch1-1
* config and/or log files etc.


Steps to reproduce:
Run archlinux with a Sierra Wireless EM7455 Qualcomm modem attached.
This task depends upon

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