I can't open qtcreator in ubuntu

marbor

Hi,
I have a problem... I can not open my qt creator app. I click two times but nothing happens. I already reinstall qt creator but it doesn't help. Maybe somebody had same problem and can help me.
My softwere: Ubuntu 20.04
I try to install qtcreator with Qt 6

SGaist

Hi and welcome to devnet,

Use a terminal and start Qt Creator from there, you should get some more information about what is going wrong.

How did you install Qt Creator ?

marbor

@SGaist Can You tell me what should i do to start Qt Creator from treminal? To install Qt using special Qt app (i downloaded it qt website).

SGaist

Search for the Terminal application, go to the folder where you installed Qt Creator and start it.

What is your level of proficiency with Linux ?

marbor

From terminal:
~/Qt/Tools/QtCreator/bin$ qtcreator

Command 'qtcreator' not found, but can be installed with:

sudo apt install qtcreator

I have been using ubuntu for 2months

SGaist

To execute an application from its containing folder use ./name_of_executable.

marbor

oh, sorry
from terminal
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: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.

Aborted (memory dump)

SGaist

Start Qt Creator with the QT_DEBUG_PLUGINS environment variable set to 1. It will tell you what made the loading failed.

marbor

ok, but how can i do that? In trminal?

JonB

@marbor
Yes.

export QT_DEBUG_PLUGINS=1
./name_of_executable

marbor

thx you all, now works

SGaist

What did you have to modify ?

raz0229

@SGaist Had the same issue. Turns out the downloaded files were either incomplete or corrupted (Idk how). Just reinstalled

aaron2020

@SGaist same problem but I still can't solve it after reading your posts. 😢

SGaist

@aaron2020 hi and welcome to devnet,

What exactly did you do ?
What exactly did you install ?

Leon Abascal

I experienced the same issue. In the last step, the plugin debug warned me that libxcb-xinerama0 was missing and sudo apt-get install --reinstall libxcb-xinerama0 fixed it.
Hope it helps, cheers.

CEmori

@SGaist Hey, I'm getting the same problem as OP

"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: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.

Aborted (memory dump)"

changing the QT_DEBUG_PLUGINS variable did not change it. I reinstalled it aswell.

SGaist

Hi and welcome to devnet,

This environment variable triggers debugging output on the console so you get more information about what is failing.

Did you install the libraries @Leon-Abascal suggested ?

CEmori

@SGaist installing the missing libraries helped! Thanks a lot.

spara7c5

@Leon-Abascal you save my life! Same problem and same working solution! (ubuntu 21.04 in virtualbox)