attach modal dialogs OFF has no effect

[corrado venturini]

Start dconf Editor, set /org/gnome/shell/overrides attach-modal-dialogs = false has no effect.
same using gnome-tweak-tool

corrado@corrado-HP-p3-aa:~$ inxi -Fxx
System: Host: corrado-HP-p3-aa Kernel: 4.12.0-13-generic x86_64 bits: 64 gcc: 7.2.0
           Desktop: Gnome 3.26.0 (Gtk 3.22.19-0ubuntu1) dm: gdm3
           Distro: Ubuntu Artful Aardvark (development branch)
Machine: Device: laptop System: Hewlett-Packard product: HP 250 G3 Notebook PC v: 0991100000000000000600087 serial: N/A
           Mobo: Hewlett-Packard model: 2211 v: 86.49 serial: N/A UEFI: Insyde v: F.36 date: 12/18/2014
           Chassis: type: 10 serial: N/A
Battery BAT1: charge: 22.2 Wh 94.6% condition: 23.5/23.5 Wh (100%) volts: 12.9/11.1
           model: 13-42 OA03031 serial: 02550 01/07/2015 status: Charging
CPU: Dual core Intel Core i5-4210U (-HT-MCP-) arch: Haswell rev.1 cache: 3072 KB
           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 9578
           clock speeds: min/max: 800/2700 MHz 1: 995 MHz 2: 799 MHz 3: 799 MHz 4: 934 MHz
Graphics: Card: Intel Haswell-ULT Integrated Graphics Controller bus-ID: 00:02.0 chip-ID: 8086:0a16
           Display Server: x11 (X.Org 1.19.3 ) driver: i915 Resolution: 1366x768@60.00hz
           OpenGL: renderer: Mesa DRI Intel Haswell Mobile
           version: 4.5 Mesa 17.2.0 (compat-v: 3.0) Direct Render: Yes
Audio: Card-1 Intel 8 Series HD Audio Controller driver: snd_hda_intel bus-ID: 00:1b.0 chip-ID: 8086:9c20
           Card-2 Intel Haswell-ULT HD Audio Controller driver: snd_hda_intel bus-ID: 00:03.0 chip-ID: 8086:0a0c
           Sound: Advanced Linux Sound Architecture v: k4.12.0-13-generic
Network: Card-1: Realtek RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
           driver: r8169 v: 2.3LK-NAPI port: 3000 bus-ID: 08:00.0 chip-ID: 10ec:8136
           IF: enp8s0 state: down mac: 5c:b9:01:06:ba:ce
           Card-2: Ralink RT3290 Wireless 802.11n 1T/1R PCIe
           driver: rt2800pci v: 2.3.0 bus-ID: 09:00.0 chip-ID: 1814:3290
           IF: wlo1 state: up mac: ac:d1:b8:82:03:5d
Drives: HDD Total Size: 500.1GB (10.9% used)
           ID-1: /dev/sda model: ST500LT012 size: 500.1GB serial: W3PEAWM4
Partition: ID-1: / size: 32G used: 5.6G (19%) fs: ext4 dev: /dev/sda3
           ID-2: swap-1 size: 4.29GB used: 0.00GB (0%) fs: swap dev: /dev/sda2
RAID: System: supported: N/A
           No RAID devices: /proc/mdstat, md_mod kernel module present
           Unused Devices: none
Sensors: System Temperatures: cpu: 46.0C mobo: 46.0C
           Fan Speeds (in rpm): cpu: N/A
Info: Processes: 241 Uptime: 2:02 Memory: 1134.7/3880.1MB Init: systemd v: 234 runlevel: 5 Gcc sys: N/A
           Client: Shell (bash 4.4.121 running in gnome-terminal-) inxi: 2.3.37
corrado@corrado-HP-p3-aa:~$

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-shell 3.26.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.12.0-13.14-generic 4.12.10
Uname: Linux 4.12.0-13-generic x86_64
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Sep 18 15:02:22 2017
DisplayManager: gdm3
GsettingsChanges:
 b'org.gnome.shell' b'command-history' b"['ubuntu-bug -w', 'ubuntu-bug totem', 'ubuntu-bug gnome-shell']"
 b'org.gnome.shell' b'app-picker-view' b'uint32 1'
 b'org.gnome.shell' b'favorite-apps' b"['firefox.desktop', 'rhythmbox.desktop', 'org.gnome.Nautilus.desktop', 'org.gnome.Software.desktop', 'yelp.desktop', 'org.gnome.Logs.desktop', 'org.gnome.Screenshot.desktop', 'gnome-system-monitor.desktop', 'org.gnome.Terminal.desktop', 'org.gnome.Calculator.desktop', 'org.gnome.Calendar.desktop', 'ca.desrt.dconf-editor.desktop', 'gnome-tweak-tool.desktop']"
 b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
InstallationDate: Installed on 2017-09-12 (6 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170911)
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue you are reporting is an upstream one and it would be nice if somebody having it could send the bug to the developers of the software by following the instructions at https://wiki.ubuntu.com/Bugs/Upstream/GNOME. If you have done so, please tell us the number of the upstream bug (or the link), so we can add a bugwatch that will inform us about its status. Thanks in advance.

[corrado venturini (corradoventu)]

https://bugzilla.gnome.org/show_bug.cgi?id=787844