Public bug reported:

I have an external monitor in portrait mode, which means that the top of
my external monitor is substantially above my laptop monitor (which has
the top bar).  If I move a window by holding Meta and dragging it from
the bottom, and accidentally let go with the window overlapping the top
bar, then GNOME Shell becomes effectively unresponsive.  My cursor is
stuck as the move hand cursor, and I can move it but do nothing else.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu4
ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
ApportVersion: 2.20.8-0ubuntu8
Architecture: amd64
CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Wed Feb  7 17:07:38 2018
DistUpgraded: 2018-01-23 11:42:22,182 DEBUG Running PostInstallScript: 
'./xorg_fix_proprietary.py'
DistroCodename: bionic
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 5.2.6, 4.13.0-31-generic, x86_64: installed
 virtualbox, 5.2.6, 4.13.0-32-generic, x86_64: installed
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
 Intel Corporation 4th Gen Core Processor Integrated Graphics Controller 
[8086:0416] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: Lenovo ThinkPad T440p [17aa:220e]
InstallationDate: Installed on 2017-10-23 (107 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
MachineType: LENOVO 20ANCTO1WW
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-32-generic.efi.signed 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to bionic on 2018-01-23 (15 days ago)
dmi.bios.date: 05/21/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GLET70WW (2.24 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20ANCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50512 STD
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: 
dmi:bvnLENOVO:bvrGLET70WW(2.24):bd05/21/2014:svnLENOVO:pn20ANCTO1WW:pvrThinkPadT440p:rvnLENOVO:rn20ANCTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad T440p
dmi.product.name: 20ANCTO1WW
dmi.product.version: ThinkPad T440p
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.89-1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.3.3-0ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 17.3.3-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.5-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.10.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

** Affects: gnome-shell (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic reproducible third-party-packages ubuntu

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1748029

Title:
  Dragging and dropping a window in the top bar causes GNOME shell to
  become unusable

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https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1748029/+subscriptions

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