Details
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Bug
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Resolution: Done
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P3: Somewhat important
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None
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5.3.2
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None
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Debian 8 with xinit and the i3 window manager
Description
I have two monitors, and I have two scripts that uses xrandr to switch back and forth between the two monitors.
monitor-layout-gamemode.sh
#!/usr/bin/env bash
xrandr \
--output "DVI-D-0" --mode "1920x1080" --rate "144.00" --primary \
--output "DP-1" --off \
--output "HDMI-0" --off
monitor-layout-default.sh
#!/usr/bin/env bash
xrandr \
--output "DP-1" --mode "3840x2160" --rate "60" --primary \
--output "HDMI-0" --off \
--output "DVI-D-0" --off
I also have two applications that uses Qt 5, namely Viber and TeamSpeak 3.
Whenever I use one of my scripts to change the monitor layout, both these applications disappear. Their processes are still running, but their windows and system tray icons disappear.
I also have an application that uses Qt 4 (Spotify), and that application does not disappear when I change the monitor layout. In other words, it looks like this bug only affects Qt 5, and not Qt 4.
The console output from TeamSpeak 3 when I change the monitor layout looks like this:
requestSystemTrayWindowDock failed. requestSystemTrayWindowDock failed. requestSystemTrayWindowDock failed. requestSystemTrayWindowDock failed. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x1e90b60, name = "QSystemTrayIconSysWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. requestSystemTrayWindowDock failed. requestSystemTrayWindowDock failed. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle. QBackingStore::flush() called for QWidgetWindow(0x2014140, name = "MainWindowClassWindow") which does not have a handle.
And it keeps outputting the same last line about 50 times per second until I kill the application. The Viber executable produces no text output.
Workaround
I can split my xrandr command into two commands, one where the new monitor is enabled and one where all other monitors are disabled:
monitor-layout-gamemode.sh
#!/usr/bin/env bash
xrandr \
--output "DVI-D-0" --mode "1920x1080" --rate "144.00" --primary
xrandr \
--output "DP-1" --off \
--output "HDMI-0" --off
Now the Qt 5 windows no longer die and disappear, but they are curiously moved to my first workspace, rather than staying in their original positions like all my other windows do.
How to reproduce
- Prepare 2 monitors
- Enable one of the monitors, and disable the other one
- Start some Qt 5 applications
- Switch monitors in a single xrandr command, for example:
xrandr --output DP-1 --off --output DVI-D-0 --mode 1920x1080 - The Qt 5 windows should now have disappeared
Environment details
$ uname -a Linux bonus-debian 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt9-3~deb8u1 (2015-04-24) x86_64 GNU/Linux $ lsb_release -a LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch:core-4.1-amd64:core-4.1-noarch Distributor ID: Debian Description: Debian GNU/Linux 8.0 (jessie) Release: 8.0 Codename: jessie $ dpkg -l | grep i3 | grep "window manager" ii i3 4.8-2 amd64 metapackage (i3 window manager, screen locker, menu, statusbar) ii i3-wm 4.8-2 amd64 improved dynamic tiling window manager $ dpkg -l | grep -i libqt ii libqt4-dbus:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 D-Bus module ii libqt4-dbus:i386 4:4.8.6+git64-g5dc8b2b+dfsg-3 i386 Qt 4 D-Bus module ii libqt4-declarative:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 Declarative module ii libqt4-designer:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 designer module ii libqt4-dev 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 development files ii libqt4-dev-bin 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 development programs ii libqt4-help:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 help module ii libqt4-network:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 network module ii libqt4-network:i386 4:4.8.6+git64-g5dc8b2b+dfsg-3 i386 Qt 4 network module ii libqt4-opengl:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 OpenGL module ii libqt4-opengl:i386 4:4.8.6+git64-g5dc8b2b+dfsg-3 i386 Qt 4 OpenGL module ii libqt4-opengl-dev 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 OpenGL library development files ii libqt4-qt3support:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 3 compatibility library for Qt 4 ii libqt4-script:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 script module ii libqt4-scripttools:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 script tools module ii libqt4-sql:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 SQL module ii libqt4-sql-mysql:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 MySQL database driver ii libqt4-sql-sqlite:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 SQLite 3 database driver ii libqt4-svg:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 SVG module ii libqt4-test:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 test module ii libqt4-xml:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 XML module ii libqt4-xml:i386 4:4.8.6+git64-g5dc8b2b+dfsg-3 i386 Qt 4 XML module ii libqt4-xmlpatterns:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 XML patterns module ii libqt4-xmlpatterns:i386 4:4.8.6+git64-g5dc8b2b+dfsg-3 i386 Qt 4 XML patterns module ii libqt5core5a:amd64 5.3.2+dfsg-4+b1 amd64 Qt 5 core module ii libqt5dbus5:amd64 5.3.2+dfsg-4+b1 amd64 Qt 5 D-Bus module ii libqt5gui5:amd64 5.3.2+dfsg-4+b1 amd64 Qt 5 GUI module ii libqt5network5:amd64 5.3.2+dfsg-4+b1 amd64 Qt 5 network module ii libqt5printsupport5:amd64 5.3.2+dfsg-4+b1 amd64 Qt 5 print support module ii libqt5test5:amd64 5.3.2+dfsg-4+b1 amd64 Qt 5 test module ii libqt5widgets5:amd64 5.3.2+dfsg-4+b1 amd64 Qt 5 widgets module ii libqtassistantclient4:amd64 4.6.3-6 amd64 Qt Assistant client library (runtime) ii libqtcore4:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 core module ii libqtcore4:i386 4:4.8.6+git64-g5dc8b2b+dfsg-3 i386 Qt 4 core module ii libqtdbus4:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 D-Bus module library ii libqtdbus4:i386 4:4.8.6+git64-g5dc8b2b+dfsg-3 i386 Qt 4 D-Bus module library ii libqtgui4:amd64 4:4.8.6+git64-g5dc8b2b+dfsg-3 amd64 Qt 4 GUI module ii libqtgui4:i386 4:4.8.6+git64-g5dc8b2b+dfsg-3 i386 Qt 4 GUI module ii libqtwebkit-dev 2.3.4.dfsg-3 amd64 Web content engine library for Qt - development files ii libqtwebkit4:amd64 2.3.4.dfsg-3 amd64 Web content engine library for Qt ii libqtwebkit4:i386 2.3.4.dfsg-3 i386 Web content engine library for Qt