OS: Ubuntu 18
Qt: 5.15.1 GCC x64
I tried
qDebug()<<"screens"<<QGuiApplication::screens();
xcb which shows:
screens (QScreen(0x55ab206fba50, name="HDMI-0"), QScreen(0x55ab206fba90, name="DVI-D-0"))
but on eglfs which shows:
screens (QScreen(0x55c07f8308f0, name=""))
backend used eglfs_x11 cannot detect the second screen, so I tired eglfs_kms_egldevice, then the app even cannot enter the main function and give
Could not open DRM (NV) device