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[Launchpad Bug Tracker <1403758@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package qtbase-opensource-src - 5.4.0+dfsg-
4ubuntu2

---------------
qtbase-opensource-src (5.4.0+dfsg-4ubuntu2) vivid; urgency=medium

  [ Timo Jyrinki ]
  * New upstream release.
  * debian/patches/qimage_conversions.cpp-Fix-little-endian-build.patch:
    - Fix PowerPC build (LP: #1400244)
  * Remove patches:
    - debian/patches/Always-lock-the-DBus-dispatcher-before-dbus_connecti.patch
    - debian/patches/Don-t-always-chmod-the-XDG_RUNTIME_DIR.patch
    - debian/patches/Fix-crash-in-QNetworkAccessCacheBackend-closeDownstr.patch
    - debian/patches/Partially-revert-Fix-a-deadlock-introduced-by-the-ra.patch
    - debian/patches/QDBusConnection-Merge-the-dispatch-and-the-watch-and.patch
    - debian/patches/Report-the-system-error-on-why-chmod-2-failed-in-XDG.patch
    - debian/patches/Reset-QNAM-s-NetworkConfiguration-when-state-changes.patch
    - debian/patches/Support-dual-sim-in-QtBearer-s-networkmanager-backen.patch
    - debian/patches/Use-a-property-cache-to-cut-down-on-blocking-calls.patch
    - debian/patches/dbus_correct_signal_name_disconnect.patch
    - debian/patches/fix_bug_in_internal_comparison_operator.patch
    - debian/patches/fix_sparc_atomics.patch
    - debian/patches/prefer_qpa_for_systemtrayicon.patch
    - debian/patches/update-QtBearer-NetworkManager-backend-API.patch
  * Include the networkmanager backend changes from 5.4.1
  * Bump ABI version to 5.4.0
  * debian/patches/Resolve-GLES3-functions-from-the-shared-lib.patch
    - Fix usage on OpenGL ES2 platforms (LP: #1403511)
  * Sync with Debian 5.4.0+dfsg-4
  * debian/patches/enable-tests.patch:
    - Refresh and enable for 5.4.0 (LP: #1403582)
    - Disable the tests for new QStorageInfo class which partially fail
    - Disable some widgets tests that fail (desktop only)
    - Disable one qlogging test
  * Drop reduce-relocations option from configure, since it causes black screen
    for Unity8 on armhf because of linking problems. Comment out the related
    revert of earlier upstream commit. (LP: #1403758)
  * debian/patches/Add-C++11-if-available-for-QVariant-autotest.patch
    - Fix tst_qvariant (LP: #1408273)

  [ Łukasz 'sil2100' Zemczak ]
  * debian/patches/enable_pie.patch:
    - Add fix for QObject::connect failing on ARM

qtbase-opensource-src (5.4.0+dfsg-4) experimental; urgency=medium

  * debian/patches/bsd_statfs.diff: Third attempt to fix the build
    failure on kfreebsd.
  * Update symbols files for mips.

qtbase-opensource-src (5.4.0+dfsg-3) experimental; urgency=medium

  * More debian/copyright updates.
  * Do not ship htmlinfo example which contains non-free HTML pages.
  * Drop remove_icon_from_example.patch and remove_google_adsense.patch,
    no longer needed with the above change.
  * Update symbols files with buildds’ logs.
  * debian/patches/bsd_statfs.diff: Second attempt to fix the build
    failure.

qtbase-opensource-src (5.4.0+dfsg-2) experimental; urgency=medium

  * Add a patch to fix qstorageinfo_unix.cpp build on kFreeBSD.
  * Add a patch to fix qimage_conversions.cpp build on big endian
    systems.
  * Update symbols files with buildds’ logs.

qtbase-opensource-src (5.4.0+dfsg-1) experimental; urgency=medium

  [ Dmitry Shachnev ]
  * New upstream release.
  * Drop fix_bug_in_internal_comparison_operator.patch, applied upstream.
  * Drop fix_sparc_atomics.patch, applied upstream.
  * Update .install files.
  * Bump ABI version to 5.4.0.
  * Update debian/copyright to reflect LGPLv3 addition.
  * Update .symbols files for new release.
  * Bump Standards-Version to 3.9.6, no changes needed.

  [ Timo Jyrinki ]
  * Bump ABI also in the lintian overrides.
 -- Timo Jyrinki <timo-jyrinki@xxxxxxxxxx>   Fri, 13 Feb 2015 11:38:11 +0000

** Changed in: qtbase-opensource-src (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1403758

Title:
  Unity8 shows black screen with Qt 5.4.0

Status in qtbase-opensource-src package in Ubuntu:
  Fix Released
Status in ubuntu-ui-toolkit package in Ubuntu:
  Invalid
Status in unity8 package in Ubuntu:
  Fix Released

Bug description:
  With bug #1403511 taken care of in Qt, apps do not anymore crash with
  Qt 5.4 and device does not anymore go into reboot loop. However,
  nothing is visible on the screen.

  It seems unity8, unity8-dash etc are all running. unity8.log attached

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