Accessibility menu not shown on lockscreen

[DH]

First off, I do not know for sure if this bug should be filed against "unity-greeter" package, so some guidance from someone more in the know would be appreciated.

When I choose to lock my session, there is no "accessibility menu" (icon of person-figure in a circle) in the upper panel, like there is on the login screen that shows on a fresh boot. This means that I cannot manually turn on the onboard on-screen keyboard using only the touchscreen. This in turn means that I cannot log in without re-docking to my 2-in-1's keyboard.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.8.0-30.32~16.04.1-generic 4.8.6
Uname: Linux 4.8.0-30-generic x86_64
.tmp.unity_support_test.0:

ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Fri Dec 9 19:39:17 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation Sky Lake Integrated Graphics [8086:191e] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Skylake Integrated Graphics [17aa:3812]
InstallationDate: Installed on 2016-11-24 (16 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: LENOVO 80QL
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-30-generic root=UUID=7b55f366-118f-45eb-aba9-a81106cfb6a7 ro quiet splash usbcore.autosuspend=-1 vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/15/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: DFCN51WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Chelsea
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo ideapad MIIX 700-12ISK
dmi.modalias: dmi:bvnLENOVO:bvrDFCN51WW:bd08/15/2016:svnLENOVO:pn80QL:pvrLenovoideapadMIIX700-12ISK:rvnLENOVO:rnChelsea:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrLenovoideapadMIIX700-12ISK:
dmi.product.name: 80QL
dmi.product.version: Lenovo ideapad MIIX 700-12ISK
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.12.2+16.04.20160823-0ubuntu1
version.ia32-libs: ia32-libs N/A
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 2:1.18.4-0ubuntu0.2
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 2:2.99.917+git20160325-1ubuntu1.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2
xserver.bootTime: Fri Dec 9 19:34:07 2016
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 16708
 vendor SDC
xserver.version: 2:1.18.4-0ubuntu0.2