How to detect multi screen with eglfs?

[arkceajin]

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, then I tired eglfs_kms_egldevice the app even cannot enter main function gaveCould not open DRM (NV) device

[mrjj]

Hi
As far as i know, eglfs does not support multiple displays.
https://forum.qt.io/topic/88111/imx6-multi-screen-use-eglfs

[arceajin]

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