In a dual screen setup, new xfce windows or dialogs are not
always appearing on the primary screen.
Depending on the window or dialog, it appears on the primary
screen or on the other screen.
This behaviour appeared after upgrade to Debian 9, it was working
properly in Debian 8.
Note that I tried by replacing xfxm4 by metacity. At least the weather widget
test (see below) then works properly.
For example, when clicking on <user> -> Log Out, the dialog appears on the
primary screen, while when clicking on <user> -> Shutdown,
the shutdown confirmation dialog appears on the other screen.
Here are some applications that appear on the primary screen:
Here are some applications that appear on the other screen:
If I click on the weather widget (which is in a panel on the
primary screen), the detailed weather report is opened on
the other screen.
nvidia card GeForce GTX 750 Ti, with nvidia driver 375.82
xrandr properly indicates the primary screen:
Screen 0: minimum 8 x 8, current 3200 x 1080, maximum 16384 x 16384
VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis)
360mm x 270mm
720x400 85.04 +
1280x1024 85.02* 75.02
1024x768 100.00 85.00 75.03 60.00
800x600 85.06 75.00
640x480 85.01 75.00 59.94
DVI-D-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected primary 1920x1080+1280+0 (normal left inverted right x
axis y axis) 521mm x 293mm
1920x1080 60.00*+ 59.94 50.00 60.00 50.04
1440x900 74.98 59.89
1280x1024 75.02 60.02
1280x720 60.00 59.94 50.00
1024x768 75.03 60.00
800x600 75.00 60.32
640x480 75.00 72.81 59.94 59.93
In Window Manager Tweaks Placement, I have tried all possible settings,
but none of the settings are influencing the positionning of applications
appearing on the other screen.
The list above was done with the setting:
Minimum size to trigger smart placement : Small
place windows Under the mouse pointer
Note that e.g. when I am setting
Minimum size to trigger smart placement : Large
place windows At the centre of the screen
then e.g. xfce4-terminal will appear at the centre of the screen.
So, it looks like some dialogs/widgets/screens are respecting the window
manager positionning, while others are not.
(note: I have reported this via Debian bug first,
Seeing no activity there, I am trying upstream ...
-- System Information:
Debian Release: 9.1
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.9.0-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8),
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages xfce4 depends on:
ii gtk2-engines-xfce 3.2.0-2
ii libxfce4ui-utils 4.12.1-2
ii orage 4.12.1-3
ii thunar 1.6.11-1
ii xfce4-appfinder 4.12.0-2
ii xfce4-panel 4.12.1-2
ii xfce4-pulseaudio-plugin 0.2.4-1
ii xfce4-session 4.12.1-5
ii xfce4-settings 4.12.1-1
ii xfconf 4.12.1-1
ii xfdesktop4 4.12.3-3
ii xfwm4 4.12.4-1
After upgrade to buster, this all works.