Public bug reported:

Issue: 
kernel 3.13.0-91: both wireless and touchpad worked as expected (report was 
generated using this kernel)
after updating to kernel 3.13.0-92: neither wireless nor touchpad work. Network 
does not even show to enable wifi, so no SSID-s are seen. Touchpad simply not 
reacts, no mouse symbol.

Computer: Lenovo Flex 2 14"

Wireless card: Broadcom Corporation BCM43142 802.11b/g/n, 
Driver: using Broadcom 802.11 Linux STA wireless driver source from 
bcmwl-kernel-source (proprietary)

Touchpad:
I: Bus=0011 Vendor=0002 Product=000e Version=0000
N: Name="ETPS/2 Elantech Touchpad"
P: Phys=isa0060/serio1/input0
S: Sysfs=/devices/platform/i8042/serio1/input/input18
U: Uniq=
H: Handlers=mouse0 event4 
B: PROP=5
B: EV=b
B: KEY=e420 10000 0 0 0 0
B: ABS=661800011000003

OS: Ubuntu 14.04 x64 
/proc/version_signature: Ubuntu 3.13.0-91.138-generic 3.13.11-ckt39

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-91-generic 3.13.0-91.138
ProcVersionSignature: Ubuntu 3.13.0-91.138-generic 3.13.11-ckt39
Uname: Linux 3.13.0-91-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  kj         1726 F.... pulseaudio
 /dev/snd/controlC0:  kj         1726 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Jul 20 14:49:43 2016
HibernationDevice: RESUME=UUID=c434037e-9055-4781-9625-3f59f90ef7bd
InstallationDate: Installed on 2014-12-07 (591 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 04f3:0446 Elan Microelectronics Corp. 
 Bus 001 Device 003: ID 105b:e065 Foxconn International, Inc. BCM43142A0 
Bluetooth module
 Bus 001 Device 002: ID 0bda:579c Realtek Semiconductor Corp. 
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 20404
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-91-generic.efi.signed 
root=UUID=774a220e-0926-4480-84aa-32c562f2062b ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-91-generic N/A
 linux-backports-modules-3.13.0-91-generic  N/A
 linux-firmware                             1.127.22
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/08/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: A0CN31WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Lenovo Flex 2-14
dmi.board.vendor: LENOVO
dmi.board.version: 31900058 Std
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo Flex 2-14
dmi.modalias: 
dmi:bvnLENOVO:bvrA0CN31WW:bd10/08/2014:svnLENOVO:pn20404:pvrLenovoFlex2-14:rvnLENOVO:rnLenovoFlex2-14:rvr31900058Std:cvnLENOVO:ct10:cvrLenovoFlex2-14:
dmi.product.name: 20404
dmi.product.version: Lenovo Flex 2-14
dmi.sys.vendor: LENOVO

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1604814

Title:
  Newest kernel update disables wireless and touchpad

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