** Description changed:

+ [Impact]
+ 
+ This affects Groovy → Hirsute upgrades for users who had qt5-default
+ package installed.
+ 
+ For these users, apt could replace libqt5gui5 with libqt5gui5-gles,
+ which is not suitable for most desktop systems and can result in all
+ kinds of broken UI (such as missing icons).
+ 
+ [Test Plan]
+ 
+ 1. Get a groovy amd64 system (e.g. a chroot).
+ 2. Install qt5-default package.
+ 3. Replace groovy with hirsute in /etc/apt/sources.list.
+ 4. Run "apt update".
+ 5. Run "apt dist-upgade".
+ 
+ Incorrect behavior:
+ 
+ The following packages will be REMOVED:
+   libqt5gui5 qt5-default qtbase5-dev
+ The following NEW packages will be installed:
+   ... libqt5gui5-gles ...
+ 
+ Correct behavior: only qt5-default is removed, libqt5gui5 is not removed
+ and libqt5gui5-gles is not installed.
+ 
+ [Where problems could occur]
+ 
+ The fix is adding "Breaks: qt5-default" in three packages:
+ - qtbase5-dev (built from qtbase-opensource-src source).
+ - qtbase5-gles-dev (built from qtbase-opensource-src-gles source).
+ - libqt5gui5-gles (built from qtbase-opensource-src-gles source).
+ 
+ It can affect apt's dependency resolver. Example of a problem may be the
+ resolver keeping the old behavior in some cases.
+ 
+ [Other Info]
+ 
+ See this post for details on what the -gles packages are:
+ https://mitya57.me/weblog/2020/01/qt-opengl-es-packages-available.html
+ 
+ See my discussion with one of the developers of apt on this issue:
+ https://lists.debian.org/debian-devel/2021/05/msg00076.html
+ https://lists.debian.org/debian-devel/2021/05/msg00150.html
+ https://lists.debian.org/debian-devel/2021/05/msg00162.html
+ 
+ Also see this comment where I collected some links to stories of users who 
were affected by this bug:
+ https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=976389#10
+ 
+ [Original Description]
+ 
  Hi, just testing Kubuntu 21.04 on a spare machine. The upgrade initially
  was fine, but I then install kdenlive and krita which has messed up the
  system icons and window decorations (corners of windows are showing
  black squares).
  
  I have been through all the normal checks and even created a new user,
  but the bug still persists. The system Icons are broken in the system
  and nothing to do with the user account.
  
  lsb_release -rd
  Description:    Ubuntu Hirsute Hippo (development branch)
  Release:        21.04
  
  Looking at the following may shed some light on the problem...
  
  Thanks, Paul.
  
- more .xsession-errors 
+ more .xsession-errors
  property "maximumWidth"
  
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
- 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+ 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
  libpng warning: iCCP: profile 'ICC profile': 'RGB ': RGB color space not 
permitted on grayscale PNG
  libpng warning: iCCP: profile 'ICC profile': 'RGB ': RGB color space not 
permitted on grayscale PNG
  QSGTextureAtlas: texture atlas allocation failed, code=501
  
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/AbstractApplicationItem.qml:94:
 TypeError: Cannot read pro
  perty 'position' of null
  
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/AbstractApplicationItem.qml:93:
 TypeError: Cannot read pro
  perty 'background' of null
  file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/newstuff/qml/Page.qml:130: 
TypeError: Cannot read property 'useLabel'
-  of null
+  of null
  file:///usr/share/kpackage/kcms/kcm_splashscreen/contents/ui/main.qml:42:13: 
QML ColumnLayout: Cannot anchor to an ite
  m that isn't a parent or sibling.
  qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 55182, 
resource id: 69206064, major code: 18 (ChangePr
  operty), minor code: 0
  qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 64351, 
resource id: 69206065, major code: 18 (ChangePr
  operty), minor code: 0
  QQmlEngine::setContextForObject(): Object already has a QQmlContext
  
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
- 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
- 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
- QSGTextureAtlas: texture atlas allocation failed, code=501
- file:///usr/share/kpackage/kcms/kcm_style/contents/ui/main.qml:52:13: QML 
ColumnLayout: Cannot anchor to an item that 
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+ 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+ 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+ QSGTextureAtlas: texture atlas allocation failed, code=501
+ file:///usr/share/kpackage/kcms/kcm_style/contents/ui/main.qml:52:13: QML 
ColumnLayout: Cannot anchor to an item that
  isn't a parent or sibling.
  xsettingsd: Reloading configuration
  xsettingsd: Loaded 11 settings from 
/home/paul/.config/xsettingsd/xsettingsd.conf
  kdeinit5: Got SETENV 
'GTK_RC_FILES=/etc/gtk/gtkrc:/home/paul/.gtkrc:/home/paul/.config/gtkrc' from 
launcher.
  kdeinit5: Got SETENV 
'GTK2_RC_FILES=/etc/gtk-2.0/gtkrc:/home/paul/.gtkrc-2.0:/home/paul/.config/gtkrc-2.0'
 from launch
  er.
- QDBusConnection: error: could not send signal to service "" path 
"//home/paul/.kde/share/config/kdeglobals" interface 
+ QDBusConnection: error: could not send signal to service "" path 
"//home/paul/.kde/share/config/kdeglobals" interface
  "org.kde.kconfig.notify" member "ConfigChanged": Invalid object path: 
//home/paul/.kde/share/config/kdeglobals
  QQmlEngine::setContextForObject(): Object already has a QQmlContext
  
file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls.2/org.kde.desktop/ScrollView.qml:86:25:
 QML ScrollBar: Bindi
  ng loop detected for property "visible"
  file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kcm/GridViewKCM.qml:65:5: 
QML GridView: Binding loop detected for pro
  perty "rightPadding"
  
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
- 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
- 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+ 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+ 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
  QSGTextureAtlas: texture atlas allocation failed, code=501
  
file:///usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls.2/org.kde.desktop/private/MobileTextActionsToolBar.qml:15:1:
-  QML MobileTextActionsToolBar: Binding loop detected for property 
"contentHeight"
+  QML MobileTextActionsToolBar: Binding loop detected for property 
"contentHeight"
  kdeinit5: PID 684540 terminated.
  qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 17471, 
resource id: 17560385, major code: 3 (GetWindow
  Attributes), minor code: 0
  qt.qpa.xcb: QXcbConnection: XCB error: 9 (BadDrawable), sequence: 17472, 
resource id: 17560385, major code: 14 (GetGeo
  metry), minor code: 0
  QSGTextureAtlas: texture atlas allocation failed, code=501
  qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 20876, 
resource id: 67109938, major code: 15 (QueryTre
  e), minor code: 0
  kwin_core: XCB error: 152 (BadDamage), sequence: 23001, resource id: 
17560907, major code: 143 (DAMAGE), minor code: 2
-  (Destroy)
+  (Destroy)
  kwin_core: XCB error: 3 (BadWindow), sequence: 23002, resource id: 67109951, 
major code: 129 (SHAPE), minor code: 6 (I
  nput)
  qt.qpa.xcb: QXcbConnection: XCB error: 3 (BadWindow), sequence: 23003, 
resource id: 67109951, major code: 2 (ChangeWin
  dowAttributes), minor code: 0
- QDBusConnection: error: could not send signal to service "" path 
"//home/paul/.kde/share/config/kdeglobals" interface 
+ QDBusConnection: error: could not send signal to service "" path 
"//home/paul/.kde/share/config/kdeglobals" interface
  "org.kde.kconfig.notify" member "ConfigChanged": Invalid object path: 
//home/paul/.kde/share/config/kdeglobals
  kdeinit5: Got SETENV 'XCURSOR_THEME=breeze_cursors' from launcher.
  kdeinit5: Got SETENV 
'GTK_RC_FILES=/etc/gtk/gtkrc:/home/paul/.gtkrc:/home/paul/.config/gtkrc' from 
launcher.
  kdeinit5: Got SETENV 
'GTK2_RC_FILES=/etc/gtk-2.0/gtkrc:/home/paul/.gtkrc-2.0:/home/paul/.config/gtkrc-2.0'
 from launch
  er.
  xsettingsd: Reloading configuration
  xsettingsd: Loaded 11 settings from 
/home/paul/.config/xsettingsd/xsettingsd.conf
  kdeinit5: Got SETENV 
'GTK_RC_FILES=/etc/gtk/gtkrc:/home/paul/.gtkrc:/home/paul/.config/gtkrc' from 
launcher.
  kdeinit5: Got SETENV 
'GTK2_RC_FILES=/etc/gtk-2.0/gtkrc:/home/paul/.gtkrc-2.0:/home/paul/.config/gtkrc-2.0'
 from launch
  er.
  xsettingsd: Reloading configuration
  xsettingsd: Loaded 11 settings from 
/home/paul/.config/xsettingsd/xsettingsd.conf
  OpenGL vendor string:                   AMD
  OpenGL renderer string:                 Radeon RX 580 Series (POLARIS10, DRM 
3.40.0, 5.11.0-11-generic, LLVM 11.0.1)
  OpenGL version string:                  4.6 (Compatibility Profile) Mesa 
21.0.0
  OpenGL shading language version string: 4.60
  Driver:                                 RadeonSI
  GPU class:                              Arctic Islands
  OpenGL version:                         4.6
  GLSL version:                           4.60
  Mesa version:                           21.0
  X server version:                       1.20.10
  Linux kernel version:                   5.11
  Requires strict binding:                yes
  GLSL shaders:                           yes
  Texture NPOT support:                   yes
  Virtual Machine:                        no
  kwin_core: XCB error: 10 (BadAccess), sequence: 23342, resource id: 1743, 
major code: 142 (Composite), minor code: 2 (
  RedirectSubwindows)
  BlurConfig::instance called after the first use - ignoring
- QDBusConnection: error: could not send signal to service "" path 
"//home/paul/.kde/share/config/kdeglobals" interface 
+ QDBusConnection: error: could not send signal to service "" path 
"//home/paul/.kde/share/config/kdeglobals" interface
  "org.kde.kconfig.notify" member "ConfigChanged": Invalid object path: 
//home/paul/.kde/share/config/kdeglobals
  CoverSwitchConfig::instance called after the first use - ignoring
  DesktopGridConfig::instance called after the first use - ignoring
  FlipSwitchConfig::instance called after the first use - ignoring
  KscreenConfig::instance called after the first use - ignoring
  MagicLampConfig::instance called after the first use - ignoring
  PresentWindowsConfig::instance called after the first use - ignoring
  SlideConfig::instance called after the first use - ignoring
  SlidingPopupsConfig::instance called after the first use - ignoring
  WobblyWindowsConfig::instance called after the first use - ignoring
  ZoomConfig::instance called after the first use - ignoring
  trying to show an empty dialog
  
file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19:
 QML Loader: Binding loop det
  ected for property "height"
  
file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19:
 QML Loader: Binding loop det
  ected for property "height"
  qt.svg: <input>:406:376: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:407:130: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:408:130: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:408:393: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:409:130: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:410:129: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:411:129: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:412:129: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:413:129: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:413:379: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:413:631: Could not add child element to parent element 
because the types are incorrect.
  libpng warning: iCCP: known incorrect sRGB profile
  libpng warning: known incorrect sRGB profile
  libpng warning: profile matches sRGB but writing iCCP instead
  qt.svg: <input>:5099: Could not resolve property: #linearGradient4636
  qt.svg: <input>:5099: Could not resolve property: #linearGradient4592
  qt.svg: <input>:5099: Could not resolve property: #linearGradient4247
  qt.svg: link #facesize is undefined!
  qt.svg: link #facesize is undefined!
  qt.svg: link #facesize is undefined!
  qt.svg: link #facesize is undefined!
  kdeinit5: Got SETENV 'XCURSOR_THEME=breeze_cursors' from launcher.
  kdeinit5: Got SETENV 
'GTK_RC_FILES=/etc/gtk/gtkrc:/home/paul/.gtkrc:/home/paul/.config/gtkrc' from 
launcher.
  kdeinit5: Got SETENV 
'GTK2_RC_FILES=/etc/gtk-2.0/gtkrc:/home/paul/.gtkrc-2.0:/home/paul/.config/gtkrc-2.0'
 from launch
  er.
- QDBusConnection: error: could not send signal to service "" path 
"//home/paul/.kde/share/config/kdeglobals" interface 
- "org.kde.kconfig.notify" member "ConfigChanged": Invalid object path: 
//home/paul/.kde/share/config/kdeglobals
- kdeinit5: Got SETENV 
'GTK_RC_FILES=/etc/gtk/gtkrc:/home/paul/.gtkrc:/home/paul/.config/gtkrc' from 
launcher.
- kdeinit5: Got SETENV 
'GTK2_RC_FILES=/etc/gtk-2.0/gtkrc:/home/paul/.gtkrc-2.0:/home/paul/.config/gtkrc-2.0'
 from launch
- er.
- QDBusConnection: error: could not send signal to service "" path 
"//home/paul/.kde/share/config/kdeglobals" interface 
+ QDBusConnection: error: could not send signal to service "" path 
"//home/paul/.kde/share/config/kdeglobals" interface
+ "org.kde.kconfig.notify" member "ConfigChanged": Invalid object path: 
//home/paul/.kde/share/config/kdeglobals
+ kdeinit5: Got SETENV 
'GTK_RC_FILES=/etc/gtk/gtkrc:/home/paul/.gtkrc:/home/paul/.config/gtkrc' from 
launcher.
+ kdeinit5: Got SETENV 
'GTK2_RC_FILES=/etc/gtk-2.0/gtkrc:/home/paul/.gtkrc-2.0:/home/paul/.config/gtkrc-2.0'
 from launch
+ er.
+ QDBusConnection: error: could not send signal to service "" path 
"//home/paul/.kde/share/config/kdeglobals" interface
  "org.kde.kconfig.notify" member "ConfigChanged": Invalid object path: 
//home/paul/.kde/share/config/kdeglobals
  OpenGL vendor string:                   AMD
  OpenGL renderer string:                 Radeon RX 580 Series (POLARIS10, DRM 
3.40.0, 5.11.0-11-generic, LLVM 11.0.1)
  OpenGL version string:                  4.6 (Compatibility Profile) Mesa 
21.0.0
  OpenGL shading language version string: 4.60
  Driver:                                 RadeonSI
  GPU class:                              Arctic Islands
  OpenGL version:                         4.6
  GLSL version:                           4.60
  Mesa version:                           21.0
  X server version:                       1.20.10
  Linux kernel version:                   5.11
  Requires strict binding:                yes
  GLSL shaders:                           yes
  Texture NPOT support:                   yes
  Virtual Machine:                        no
  kwin_core: XCB error: 10 (BadAccess), sequence: 40211, resource id: 1743, 
major code: 142 (Composite), minor code: 2 (
  RedirectSubwindows)
  BlurConfig::instance called after the first use - ignoring
  CoverSwitchConfig::instance called after the first use - ignoring
  DesktopGridConfig::instance called after the first use - ignoring
  FlipSwitchConfig::instance called after the first use - ignoring
  KscreenConfig::instance called after the first use - ignoring
  MagicLampConfig::instance called after the first use - ignoring
  PresentWindowsConfig::instance called after the first use - ignoring
  SlideConfig::instance called after the first use - ignoring
  SlidingPopupsConfig::instance called after the first use - ignoring
  WobblyWindowsConfig::instance called after the first use - ignoring
  ZoomConfig::instance called after the first use - ignoring
  qt.svg: <input>:406:376: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:407:130: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:408:130: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:408:393: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:409:130: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:410:129: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:411:129: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:412:129: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:413:129: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:413:379: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:413:631: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:406:376: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:407:130: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:408:130: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:408:393: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:409:130: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:410:129: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:411:129: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:412:129: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:413:129: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:413:379: Could not add child element to parent element 
because the types are incorrect.
  qt.svg: <input>:413:631: Could not add child element to parent element 
because the types are incorrect.
  Using fontconfig file: "/home/paul/.config/fontconfig/fonts.conf"
  
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
- 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+ 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
  QQmlEngine::setContextForObject(): Object already has a QQmlContext
  
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
- 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
- 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
- QSGTextureAtlas: texture atlas allocation failed, code=501
- file:///usr/share/kpackage/kcms/kcm_style/contents/ui/main.qml:52:13: QML 
ColumnLayout: Cannot anchor to an item that 
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+ 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+ 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+ QSGTextureAtlas: texture atlas allocation failed, code=501
+ file:///usr/share/kpackage/kcms/kcm_style/contents/ui/main.qml:52:13: QML 
ColumnLayout: Cannot anchor to an item that
  isn't a parent or sibling.
  QQmlEngine::setContextForObject(): Object already has a QQmlContext
  
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
- 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
- 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
-  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+ 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
+ 
file:///usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kirigami.2/private/globaltoolbar/PageRowGlobalToolBarUI.qml:65:9:
 QML
+  RowLayout (parent or ancestor of QQuickLayoutAttached): Binding loop 
detected for property "maximumWidth"
  QSGTextureAtlas: texture atlas allocation failed, code=501
  qt.svg: <input>:663: Could not resolve property: #radialGradient3118
  qt.svg: <input>:663: Could not resolve property: #radialGradient3112
  qt.svg: <input>:663: Could not resolve property: #radialGradient3118
  qt.svg: <input>:663: Could not resolve property: #radialGradient3112
  qt.svg: <input>:663: Could not resolve property: #radialGradient3321
  qt.svg: <input>:663: Could not resolve property: #radialGradient3321
  qt.svg: <input>:663: Could not resolve property: #radialGradient3327
  paul@server-2020:~$
  
  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: xorg 1:7.7+22ubuntu1
  ProcVersionSignature: Ubuntu 5.11.0-11.12-generic 5.11.0
  Uname: Linux 5.11.0-11-generic x86_64
  ApportVersion: 2.20.11-0ubuntu60
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: unknown
  CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: KDE
  Date: Fri Mar 19 10:44:55 2021
  DistUpgraded: 2021-03-18 13:47:49,206 DEBUG Running PostInstallScript: 
'./xorg_fix_proprietary.py'
  DistroCodename: hirsute
  DistroVariant: ubuntu
  ExtraDebuggingInterest: No
  GraphicsCard:
-  Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 
470/480/570/570X/580/580X/590] [1002:67df] (rev e7) (prog-if 00 [VGA 
controller])
-    Subsystem: XFX Pine Group Inc. Radeon RX 580 [1682:c580]
+  Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 
470/480/570/570X/580/580X/590] [1002:67df] (rev e7) (prog-if 00 [VGA 
controller])
+    Subsystem: XFX Pine Group Inc. Radeon RX 580 [1682:c580]
  InstallationDate: Installed on 2020-04-11 (341 days ago)
  InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200401)
  MachineType: Micro-Star International Co., Ltd MS-7C02
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-11-generic 
root=UUID=649536d0-3377-484d-8bf4-5ccd481a6648 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: Upgraded to hirsute on 2021-03-18 (0 days ago)
  dmi.bios.date: 04/22/2020
  dmi.bios.release: 5.14
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 3.60
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: B450 TOMAHAWK MAX (MS-7C02)
  dmi.board.vendor: Micro-Star International Co., Ltd
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: To be filled by O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Micro-Star International Co., Ltd
  dmi.chassis.version: 1.0
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr3.60:bd04/22/2020:br5.14:svnMicro-StarInternationalCo.,Ltd:pnMS-7C02:pvr1.0:rvnMicro-StarInternationalCo.,Ltd:rnB450TOMAHAWKMAX(MS-7C02):rvr1.0:cvnMicro-StarInternationalCo.,Ltd:ct3:cvr1.0:
  dmi.product.family: To be filled by O.E.M.
  dmi.product.name: MS-7C02
  dmi.product.sku: To be filled by O.E.M.
  dmi.product.version: 1.0
  dmi.sys.vendor: Micro-Star International Co., Ltd
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.104-1build1
  version.libgl1-mesa-dri: libgl1-mesa-dri 21.0.0-1
  version.libgl1-mesa-glx: libgl1-mesa-glx 21.0.0-1
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.10-3ubuntu3
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20200714-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-1

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https://bugs.launchpad.net/bugs/1920130

Title:
  System icons missing in kubuntu 21.04

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