Qt hello world example does not display anything on LCD

Question

I have colibri evaluation board 3.1a with Tegra 2 on it. I have compiled Qt library and copied to board. I was trying simple hello world button app. Program runs fine(confirmed by inserting prints), but i dont get anything on the LCD display.

This is the simple code i am trying

QApplication a( argc, argv );

QPushButton hello( "Hello world!", 0 );
hello.resize( 100, 30 );

a.setMainWidget( &hello );
hello.show();
return a.exec();

Answer 1

确保使用-qws标志：

./myapp -qws