#1143746 breeze: FTBFS: This application failed to start because no Qt platform plugin could be initialized.

Package:
src:breeze
Source:
src:breeze
Submitter:
Santiago Vila
Date:
2026-08-08 10:51:04 UTC
Severity:
normal
Tags:
#1143746#5
Date:
2026-08-06 00:10:05 UTC
From:
To:
Dear maintainer:

During a rebuild of all packages in unstable, this package failed to build.

Below you will find the last part of the build log (probably the most
relevant part, but not necessarily). If required, the full build log
is available here:

https://people.debian.org/~sanvila/build-logs/202608/

About the archive rebuild: The build was made on virtual machines from AWS,
using sbuild and a reduced chroot with only build-essential packages.

If you cannot reproduce the bug please contact me privately, as I
am willing to provide ssh access to a virtual machine where the bug is
fully reproducible.

If this is really a bug in one of the build-depends, please use
reassign and add an affects on src:breeze, so that this is still
visible in the BTS web page for this package.

Thanks.
--------------------------------------------------------------------------------
[...]
Connected to MAKE jobserver
test 1
    Start 1: breezestyleconfig_smoketest

1: Test command: /usr/bin/kcmshell6 "-style" "Breeze" "--smoke-test" "kstyle_config/breezestyleconfig"
1: Working Directory: /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/kstyle6/config
1: Environment variable modifications:
1:  QT_PLUGIN_PATH=path_list_prepend:/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/bin
1: Test timeout computed to be: 10000000
test 2
    Start 2: kcm_breezedecoration_smoketest

2: Test command: /usr/bin/kcmshell6 "-style" "Breeze" "--smoke-test" "org.kde.kdecoration3.kcm/kcm_breezedecoration"
2: Working Directory: /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/kdecoration/config
2: Environment variable modifications:
2:  QT_PLUGIN_PATH=path_list_prepend:/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/bin
2: Test timeout computed to be: 10000000
1: qt.qpa.xcb: could not connect to display
1: qt.qpa.plugin: From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin.
1: qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
1: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
1:
1: Available platform plugins are: minimal, linuxfb, vkkhrdisplay, xcb, wayland-brcm, wayland-egl, wayland, offscreen, minimalegl, vnc, eglfs.
1:
2: qt.qpa.xcb: could not connect to display
2: qt.qpa.plugin: From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin.
2: qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
2: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
2:
2: Available platform plugins are: minimal, linuxfb, vkkhrdisplay, xcb, wayland-brcm, wayland-egl, wayland, offscreen, minimalegl, vnc, eglfs.
2:
1/2 Test #1: breezestyleconfig_smoketest ......Subprocess aborted***Exception:   0.04 sec
qt.qpa.xcb: could not connect to display
qt.qpa.plugin: From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin.
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: minimal, linuxfb, vkkhrdisplay, xcb, wayland-brcm, wayland-egl, wayland, offscreen, minimalegl, vnc, eglfs.


2/2 Test #2: kcm_breezedecoration_smoketest ...Subprocess aborted***Exception:   0.04 sec
qt.qpa.xcb: could not connect to display
qt.qpa.plugin: From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin.
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: minimal, linuxfb, vkkhrdisplay, xcb, wayland-brcm, wayland-egl, wayland, offscreen, minimalegl, vnc, eglfs.



0% tests passed, 2 tests failed out of 2

Total Test time (real) =   0.04 sec

The following tests FAILED:
	  1 - breezestyleconfig_smoketest (Subprocess aborted)
	  2 - kcm_breezedecoration_smoketest (Subprocess aborted)
Errors while running CTest
make[1]: *** [Makefile:74: test] Error 8
make[1]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
dh_auto_test: error: cd obj-x86_64-linux-gnu && make -j2 test ARGS\+=--verbose ARGS\+=-j2 returned exit code 2
make: *** [debian/rules:8: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2
--------------------------------------------------------------------------------

#1143746#10
Date:
2026-08-08 10:48:53 UTC
From:
To:
We believe that the bug you reported is fixed in the latest version of
breeze, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1143746@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Patrick Franz <deltaone@debian.org> (supplier of updated breeze package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Sat, 08 Aug 2026 12:31:27 +0200
Source: breeze
Architecture: source
Version: 4:6.7.2-2
Distribution: unstable
Urgency: medium
Maintainer: Debian Qt/KDE Maintainers <debian-qt-kde@lists.debian.org>
Changed-By: Patrick Franz <deltaone@debian.org>
Closes: 1143746
Changes:
 breeze (4:6.7.2-2) unstable; urgency=medium
 .
   [ Patrick Franz ]
   * Remove the remaining and now redundant Qt5 and KF5 build-
     dependencies.
   * Fix tests (Closes: #1143746).
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Files:
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