Public bug reported:

I'm a new Ubuntu user, trying to understand why I consistently get this
BUG message

Oct 14 19:57:37 belia kernel: [  729.873790] wistron_btns: BIOS signature found 
at c00f5b10, entry point 000FDD20
Oct 14 19:57:37 belia kernel: [  729.873966] BUG: unable to handle kernel 
paging request at c00fdd20
Oct 14 19:57:37 belia kernel: [  729.874050] IP: [<c00fdd20>] 0xc00fdd20
Oct 14 19:57:37 belia kernel: [  729.874095] *pdpt = 0000000001c7b001 *pde = 
0000000001d43063 *pte = 80000000000fd163
Oct 14 19:57:37 belia kernel: [  729.874186] Oops: 0011 [#1] SMP
Oct 14 19:57:37 belia kernel: [  729.876007] Hardware name: FUJITSU SIEMENS 
AMILO Pro Edition V3505        /AMILO Pro Edition V3505        , BIOS R01-B0G   

from the wistron_btns kernel module, used on FJ AMILO Pro V3505, to enable
and disable the wireless card module from the notebook function button.

The same BUG arise on all the recent kernels, including the one I'm reporting
about, even at installation time from the Ubuntu media, at module "load time".

By the way, once the kernel report this OOps, the system doesn't power
off or reboot correctly at shutdown time, it simply hangs, even when
installing the system from the media, a really serious issue for new,
naive users.

The only way to solve the problem seems to "blacklist" the module in
/etc/modprobe.d/blacklist,conf, but, unfortunately, this will "LOCK" the
wireless module in its enabled or disables state and require to boot a
different kernel to unlock its state.

I did some investigation on the Net about this issue and I found an
interesting report about this problem, that seems known at least from
kernel version 3.12,

I tested the suggested patch against the
linux/drivers/input/misc/wistron_btns.c gentoo 4.4.21 source, my main
system, and, well, it correct the BUG, not anymore any Oops and the
button seems to work correctly.

You will find the patch I applied to the wistron_btns.c source as an
attachment to this report: it is a really simple patch that I'm almost
sure (I didn't verified it) it may be applied unchanged to the
4.4.0-43-generic Ubuntu kernel image sources.

G. Vitillaro.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-43.63-generic 4.4.21
Uname: Linux 4.4.0-43-generic i686
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: i386
CompizPlugins: No value set for 
CompositorRunning: None
CurrentDesktop: KDE
Date: Sat Oct 15 12:20:12 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: kubuntu
ExtraDebuggingInterest: No
 Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics 
Controller [8086:27a2] (rev 03) (prog-if 00 [VGA controller])
   Subsystem: Fujitsu Technology Solutions Mobile 945GM/GMS, 943/940GML Express 
Integrated Graphics Controller [1734:10c1]
   Subsystem: Fujitsu Technology Solutions Mobile 945GM/GMS/GME, 943/940GML 
Express Integrated Graphics Controller [1734:10c1]
InstallationDate: Installed on 2016-09-29 (15 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release i386 (20160719)
MachineType: FUJITSU SIEMENS AMILO Pro Edition V3505
 Socket 0:
   no product info available
 Socket 0:
   no card
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-43-generic 
root=UUID=201692f6-1f2c-4b27-b9b7-172d8305a2f0 ro splash quiet vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install) 04/27/2007
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: R01-B0G AMILO Pro Edition V3505
dmi.board.vendor: FUJITSU SIEMENS
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: 221C8340FC5C11DAA7BA90D491D4809D
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU SIEMENS
dmi.chassis.version: A2040
dmi:bvnPhoenixTechnologiesLTD:bvrR01-B0G:bd04/27/2007:svnFUJITSUSIEMENS:pnAMILOProEditionV3505:pvr20:rvnFUJITSUSIEMENS:rnAMILOProEditionV3505:rvrNotApplicable:cvnFUJITSUSIEMENS:ct10:cvrA2040: AMILO Pro Edition V3505
dmi.product.version: 20
dmi.sys.vendor: FUJITSU SIEMENS
version.compiz: compiz 1:
version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2.2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2.2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.4-0ubuntu0.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Sat Oct 15 10:48:04 2016
xserver.configfile: default
 input        Power Button         KEYBOARD, id 6
 input        Video Bus            KEYBOARD, id 7
 input        Sleep Button         KEYBOARD, id 8
 input        AT Translated Set 2 keyboard KEYBOARD, id 9
 input        SynPS/2 Synaptics TouchPad TOUCHPAD, id 10
 /dev/dri/card0: failed to set DRM interface version 1.4: Permission denied
 /dev/dri/card0: failed to set DRM interface version 1.4: Permission denied
xserver.logfile: /var/log/Xorg.0.log
 product id                                5040 
 vendor                                     CPT
xserver.version: 2:1.18.4-0ubuntu0.1

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

** Patch added: "wistron_ubuntu.patch"

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  wistron_btns module possible BUG on FJ AMILO Pro V3505.

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