[Bug 1772900] Re: This application failed to start because it could not find or load the Qt platform plugin "xcb" in "".

[Wojciech Borkowski]

Looking at any solution I find similar error for VirtualBox:
https://www.virtualbox.org/ticket/17425?cversion=0&cnum_hist=3

and I use similar solution with success!

borkowsk at wojciech-CELSIUS-7:~$ ldd /usr/lib/virtualbox/*.so | grep "not found"
borkowsk at wojciech-CELSIUS-7:~$  ldd /usr/lib/virtualbox/components/*.so | grep "not found"
borkowsk at wojciech-CELSIUS-7:~$ ldd /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so | grep "not found"
	libxcb-xinerama.so.0 => not found
borkowsk at wojciech-CELSIUS-7:~$ ldd /usr/lib/virtualbox/*.so | grep "not"
borkowsk at wojciech-CELSIUS-7:~$ sudo apt --reinstall install libxcb
...

borkowsk at wojciech-CELSIUS-7:~$ konsole &
borkowsk at wojciech-CELSIUS-7:~$ krusader 
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/16/"
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/22/"
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/24/"
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/32/"
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/48/"
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/64/"
Invalid Context= "stock" line for icon theme:  "/usr/share/icons/ubuntu-mono-dark/stock/128/"
kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "mtp"
kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "mtp"
kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "mtp"
kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "mtp"
kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "mtp"
kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "mtp"

Still krusader have some warnings but now it can start!


** Bug watch added: Virtualbox Trac #17425
   http://www.virtualbox.org/ticket/17425

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https://bugs.launchpad.net/bugs/1772900

Title:
  This application failed to start because it could not find or load the
  Qt platform plugin "xcb" in "".

Status in grub-installer package in Ubuntu:
  New

Bug description:
  After grub crash during Ubuntu 18.04 LTS (Release:	18.04) installation I had probably partially installed system.
  I have fix problem with grub using boot-repair, but I'm still not able to run any Qt application.
  I have been trying to deinstall and reinstall Qt libs, and finally stacked on this:

  borkowsk at wojciech-CELSIUS-7:~$ konsole
  This application failed to start because it could not find or load the Qt platform plugin "xcb"
  in "".

  Available platform plugins are: dxcb, eglfs, linuxfb, minimal,
  minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-
  egl, wayland-xcomposite-glx, xcb.

  Reinstalling the application may fix this problem.
  Aborted (core dumped)
  borkowsk at wojciech-CELSIUS-7:~$ krusader
  This application failed to start because it could not find or load the Qt platform plugin "xcb"
  in "".

  Available platform plugins are: dxcb, eglfs, linuxfb, minimal,
  minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-
  egl, wayland-xcomposite-glx, xcb.

  Reinstalling the application may fix this problem.
  Aborted (core dumped)

  borkowsk at wojciech-CELSIUS-7:~$ xcb &
  [1] 2884

  borkowsk at wojciech-CELSIUS-7:~$ krusader
  This application failed to start because it could not find or load the Qt platform plugin "xcb"
  in "".

  Available platform plugins are: dxcb, eglfs, linuxfb, minimal,
  minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-
  egl, wayland-xcomposite-glx, xcb.

  Reinstalling the application may fix this problem.
  Aborted (core dumped)

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