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[aljosa <aljosa@xxxxxxxxxxxxxxxxxxxxxxxx>]

As suggested, I have just installed the latest 4.0-rc5 kernel.
Unfortunately, the problem is still here :(

** Tags added: kernel-bug-exists-upstream

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https://bugs.launchpad.net/bugs/1435206

Title:
  Ubuntu 15.04: Unable to use Huawei E3131 USB 3G modem

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Hello,
  in order to contribute to quality improvement of the new Ubuntu 15.04, I'm reporting problems I found in this "beta" version - related to 'Huawei E3131 USB 3G modem' and pastebinit command: 

  lsusb
  Bus 004 Device 002: ID 8087:8000 Intel Corp. 
  Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 003 Device 002: ID 8087:8008 Intel Corp. 
  Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
  Bus 001 Device 005: ID 13d3:5188 IMC Networks 
  Bus 001 Device 004: ID 062a:3633 Creative Labs 
  Bus 001 Device 003: ID 05e3:0608 Genesys Logic, Inc. USB-2.0 4-Port HUB
  Bus 001 Device 002: ID 12d1:14fe Huawei Technologies Co., Ltd. 
  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

  When I was on Ubuntu 14.04, the only possible way to use 'Huawei E3131 USB 3G modem' was to turn off my notebook, insert usb modem and then turn the notebook on again.
  Now, on Ubuntu 15.04, if I insert usb modem while notebook is turned on, I see a new icon that appears in launcher, and that's all. Nothing happens later, even if I try to turn the notebook off and on again.

  Asus optimus notebook N750JVT-4069H (Intel® Core™ i7-4700HQ; RAM 16GB; Nvidia GeForce GT750M)
  dmesg output:
  http://paste.ubuntu.com/10658886
  (Nothing has been logged yet.)

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-9-generic 3.19.0-9.9 [modified: boot/vmlinuz-3.19.0-9-generic]
  ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
  Uname: Linux 3.19.0-9-generic x86_64
  ApportVersion: 2.16.2-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  aljosa     1824 F.... pulseaudio
   /dev/snd/controlC0:  aljosa     1824 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Mon Mar 23 09:46:58 2015
  HibernationDevice: RESUME=UUID=df42f272-c519-4323-977d-bb1fe697e7f0
  InstallationDate: Installed on 2015-03-19 (3 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150318)
  MachineType: ASUSTeK COMPUTER INC. N750JV
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-9-generic.efi.signed root=UUID=da571e57-f1af-49b1-95ba-206e95c86cec ro quiet splash ipv6.disable=1 vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-9-generic N/A
   linux-backports-modules-3.19.0-9-generic  N/A
   linux-firmware                            1.143
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/11/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: N750JV.210
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: N750JV
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN750JV.210:bd04/11/2014:svnASUSTeKCOMPUTERINC.:pnN750JV:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN750JV:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: N750JV
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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