Public bug reported:
The following steps will systematically reproduce the issue. Terminal is
only an example, you can do the same with any other application that can
open multiple windows.
- open three terminal windows
- hit Ctrl+Super+D to show the Desktop. All windows disappear as expected
- click on the Terminal icon in Launcher. One of the three windows is selected
and brought to front as expected
- click on the Terminal icon again
- when presented with the three miniature windows, click on any of them except
the one you previously selected
Expected result: the selected terminal window should get focus AND be
brought to front
Observed result: the selected window is given focus but is not brought
to front. Instead, another random one of the three is brought to front.
The mere fact that the focused window is not the one on the top of the
stack (i.e. the one most on the front) is in itself an inconsistency
that should never exist and should be forbidden at the lowest
conceivable level.
Note that this is a HUGE SECURITY ISSUE and as such should be marked as
critical. You can be typing (or sending keystrokes) into a window
without even seeing it.
Since one window is brought to front, you may not realise that it is not
focused (though you can tell the difference if you look at it carefully
enough), and hence you may for example hit several keys including Enter
thinking that the selected windows is not responding, while infact your
keystrokes are all processed by the invisible focused window. You may do
random stuff on the invisible focused window. You could *literally* (and
I'm not abusing the word "literally") wipe out your hard drive or
publish your password on Facebook; or more likely, delete files or do
all kind of irreversible damages to some document of yours.
Note that I reported a somewhat similar issue where a random window is
focused instead of the clicked one but that's a different bug (it still
happens, but I don't know how to reproduce it systematicall), and
another one regarding the focused window not having the title bar and
borders, but that's different too and that particular one seems to be
fixed.
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 4.2.0-34.39-generic 4.2.8-ckt4
Uname: Linux 4.2.0-34-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86_64 Kernel Module 340.96 Sun Nov 8 22:33:28
PST 2015
GCC version: gcc version 5.2.1 20151010 (Ubuntu 5.2.1-22ubuntu2)
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Apr 3 21:38:07 2016
DistUpgraded: 2016-01-18 11:11:01,146 DEBUG enabling apt cron job
DistroCodename: wily
DistroVariant: ubuntu
GraphicsCard:
Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev
09) (prog-if 00 [VGA controller])
Subsystem: Acer Incorporated [ALI] Device [1025:0647]
NVIDIA Corporation GF117M [GeForce 610M/710M/810M/820M / GT
620M/625M/630M/720M] [10de:1140] (rev a1) (prog-if 00 [VGA controller])
Subsystem: Acer Incorporated [ALI] GeForce 710M [1025:0691]
InstallationDate: Installed on 2013-10-11 (905 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MachineType: Acer Aspire V3-571G
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-34-generic.efi.signed
root=UUID=5830b30e-69e8-4bb4-8a2b-bc2b43c7414a ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to wily on 2016-01-18 (76 days ago)
dmi.bios.date: 10/15/2012
dmi.bios.vendor: Acer
dmi.bios.version: V2.07
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: VA50_HC_CR
dmi.board.vendor: Acer
dmi.board.version: Type2 - Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V2.07
dmi.modalias:
dmi:bvnAcer:bvrV2.07:bd10/15/2012:svnAcer:pnAspireV3-571G:pvrV2.07:rvnAcer:rnVA50_HC_CR:rvrType2-BoardVersion:cvnAcer:ct10:cvrV2.07:
dmi.product.name: Aspire V3-571G
dmi.product.version: V2.07
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.12.2+15.10.20151202-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.64-1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.0.2-1ubuntu4
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.0.2-1ubuntu4
version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.17.2-1ubuntu9.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.2-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati
1:7.5.0+git20150819-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20150808-0ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu3
xserver.bootTime: Fri Apr 1 21:24:50 2016
xserver.configfile: /etc/X11/xorg.conf
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.17.2-1ubuntu9.1
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug ubuntu wily
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https://bugs.launchpad.net/bugs/1565541
Title:
Focused window is not always brought to front
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