Question:

在Ubuntu20下用在线安装方式安装qtcreator后启动无反应

Answer:

直接到安装目录 ./Tools/QtCreator/bin 执行:
sudo ./qtcreator,提示如下报错:
qt.qpa.plugin: Could not load the Qt platform plugin “xcb” in “” even though it was found.

通过如下命令安装xcb:

sudo apt-get install libxcb-xinerama0

安装完成后可以直接打开了。