#COULD NOT LOAD THE QT PLATFORM PLUGIN HOW TO#
#COULD NOT LOAD THE QT PLATFORM PLUGIN INSTALL#

That gave me a hint, though: what if it's trying to use different files from different Qt installations? On my machine I had standard version installed in /home/username/Qt/ and some local builds within my project that I compiled by myself (I have other custom built kits as well in other locations). The solution that suggested to use QT_DEBUG_PLUGINS=1 to debug the issue didn't provide me a direct insight like in the answer - instead I was getting something about unresolved symbols within Qt5Core. So, I spent about a day trying to figure out what was the issue tried all the proposed solutions, but none of that worked like installing xcb libs or exporting Qt plugins folder.

#COULD NOT LOAD THE QT PLATFORM PLUGIN INSTALL#

So I used an old trick yeah -reinstall sudo apt install -reinstall libxcb-xinerama So the solution will be install the `libxcb-xinerama.so.0' right? However, when I run the command: sudo apt install libxcb-xinerama This error prevents to the 'xcb' to load properly. Libxcb-xinerama.so.0: cannot open shared object file: No such file or directory. I tried all the solutions that I found in this thread and other webs without success.ДЇinally, I found a post where the author mention that is possible to activate the debugging told of qt5 using this simple command: export QT_DEBUG_PLUGINS=1ДЄfter adding this command I run again krita I got the same error how ever now I know the cause. This application failed to start because it could not find or load the Qt platform plugin 'xcb' in ''.ДЄvailable platform plugins are: linuxfb, minimal, minimalegl, offscreen, wayland-egl, wayland, xcb. I'm using Ubuntu 18.04 and when I installed Krita using the ppa method. thanks to the author of this answer for QT_DEBUG_PLUGINS=1. Repeat this process until all dependencies are satisfied. Copy it to your libraries path, in my case it was the same directory where my binary is (hence LD_LIBRARY_PATH=.). Note the failing libQt5DBus.so.5 library. Reinstalling the application may fix this problem. This application failed to start because it could not find or load the Qt platform plugin 'xcb' QLibraryPrivate::loadPlugin failed on '/media/sf_Qt/Package/platforms/libqxcb.so' : 'Cannot load library /media/sf_Qt/Package/platforms/libqxcb.so: (/usr/lib/x86_64-linux-gnu/libQt5DBus.so.5: version `Qt_5' not found (required by. Loaded library '/media/sf_Qt/Package/platforms/libqxcb.so' 'IID': '.QPA.QPlatformIntegrationFactoryInterface.5.3', QFactoryLoader::QFactoryLoader() looking at '/media/sf_Qt/Package/platforms/libqxcb.so'ДЇound metadata in lib /media/sf_Qt/Package/platforms/libqxcb.so, metadata= QFactoryLoader::QFactoryLoader() checking directory path '/media/sf_Qt/Package/platforms'. The command output may look like this: LD_LIBRARY_PATH=. (You may also use ldd for this as suggested in the accepted answer). Then you may want to run your binary with QT_DEBUG_PLUGINS=1 environment variable set to check which dependencies of libqxcb.so are not 'satisfied'. I wonder why authors of other answers didn't mention this.

#COULD NOT LOAD THE QT PLATFORM PLUGIN HOW TO#

How to resolve this in LinuxДЄt first, you should create platforms directory where your binary is, because it is the place where Qt looks for XCB library. Then this notorious This application failed to start because it could not find or load the Qt platform plugin 'xcb' error was thrown. Expectedly, it didn't work as is.ДЄt first, I inspected the binary itself with ldd as was suggested here, and 'satisfied' all 'not found' dependencies. I tried to start my binary, compiled with Qt 5.7, on Ubuntu 16.04 LTS where Qt 5.5 is preinstalled.

Could not load the qt platform plugin