windows vanish when alt-dragged from semi-maximized states

[Maximilian Federle]

i) steps to reproduce:

1) open window
2) semi-maximize it by dragging it to the left or right (super + left/right works as well)
3) drag it upwards by alt-clicking on it

ii) what is expected to happen:

- the window should unstick from the borders, just as it does when you drag a fully maximized window from the top

iii) what actually happens:

- the window vanishes from the user's sight onto a different workspace. The launcher itself however insists that the window is still on this workspace.

- the drag-hand icon is still displayed, while the window itself is not visible

iv) illustration

I have attached a video showing the occurence. I can confirm the same behaviour with my Intel notebook as well as without the unity plugin enabled.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: compiz 1:0.9.7.0~bzr2995-0ubuntu5
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
Uname: Linux 3.2.0-17-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Ist ein Verzeichnis: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 295.20 Mon Feb 6 21:07:30 PST 2012
 GCC version: gcc-Version 4.6.2 (Ubuntu/Linaro 4.6.2-14ubuntu2)
.tmp.unity.support.test.0:

ApportVersion: 1.93-0ubuntu2
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,imgjpeg,decor,place,gnomecompat,mousepoll,imgpng,vpswitch,session,resize,regex,grid,snap,move,wall,animation,workarounds,expo,ezoom,staticswitcher,fade,scale,unityshell]
CompositorRunning: compiz
Date: Mon Feb 27 13:30:24 2012
DistUpgraded: Log time: 2012-02-09 17:34:51.460219
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current, 295.20, 3.2.0-15-generic, x86_64: installed
 nvidia-current, 295.20, 3.2.0-16-generic, x86_64: installed
 nvidia-current, 295.20, 3.2.0-17-generic, x86_64: installed
 virtualbox, 4.1.8, 3.2.0-17-generic, x86_64: installed
GraphicsCard:
 NVIDIA Corporation GT216 [GeForce GT 220] [10de:0a20] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: Device [7377:0000]
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
JockeyStatus:
 xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, In use)
 xorg:nvidia_current_updates - NVIDIA accelerated graphics driver (post-release updates) (Proprietary, Disabled, Not in use)
MachineType: brunenIT To Be Filled By O.E.M.
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-17-generic root=UUID=848ef1c4-6df9-4bf0-8e01-4318bcfd60dd ro quiet splash vt.handoff=7
SourcePackage: compiz
UpgradeStatus: Upgraded to precise on 2012-02-09 (17 days ago)
XorgConf:
 Section "Device"
  Identifier "Default Device"
  Option "NoLogo" "True"
 EndSection
dmi.bios.date: 09/21/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.80
dmi.board.name: N68PV-GS
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.80:bd09/21/2009:svnbrunenIT:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnN68PV-GS:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: brunenIT
version.compiz: compiz 1:0.9.7.0~bzr2995-0ubuntu5
version.ia32-libs: ia32-libs 20090808ubuntu33
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.1-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.1-0ubuntu2
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.99.901+git20120126-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[Maximilian Federle (ppd)]

as I just noticed this is most likely closely related to Bug #937665.
Both show this incredible pointer/window offset after the drag. Nonetheless both bugs describe different scenarios and the outcome of this bug is way more likely to astonish the user as the window completely jumps out of sight.

[jhfhlkjlj (fdsuufijjejejejej-deactivatedaccount)]

sorry, wrong bug.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[tekstr1der (tekstr1der)]

I can confirm this behavior. The pointer offset seems to cause the described issue.