我是在Vscode上用DeviceTool运行下载在Ubuntu的鸿蒙系统的时候出现的这个问题
报错如下：
Verbose mode can be enabled via `-v, –verbose` option Uploading with qemuUpload qt.qpa.xcb: could not connect to display 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: xcb. scons: *** [run] Error -6
解决方案：
设置环境变量 export DISPLAY=:0
在Ubuntu命令行输入 gedit ~./bashrc
然后在最后加入上面的环境变量，记得点保存
最后 source ~./bashrc
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