鲁班猫2 RK3568 +MIPI 屏 QT eglfs显示问题

telantan

硬件：鲁班猫2 RK3568 + 7寸MIPI发屏
系统：官方的ubuntu 20.04 xfce系统，QT也是编译好的5.15.8
软件：QT ananlogclock example
问题：在xfce桌面环境下，./analogclock可以正常工作，使用的是xcb。想使用eglfs实现，怎么都不成功，操作步骤是这样的，
1. 调好变量


export QT_QPA_PLATFORM=eglfs
export QT_QPA_EGLFS_INTEGRATION=eglfs_kms
export QT_QPA_EGLFS_KMS_CONFIG=/opt/cursor.json
export QT_QPA_PLATFORM_PLUGIN_PATH=/lib/aarch64-linux-gnu/qt5/plugins/platforms

export QT_DEBUG_PLUGINS=1

cursor.json是这样设置的  

{
"device": "/dev/dri/card0",
"hwcursor": false,
"outputs": [
            { "name": "DSI-1", "mode": "1024x600" }
]
}


2.在不启动图形界面情况下，执行命令
./analogclock
最后报错部分是这样的，

QFactoryLoader:FactoryLoader() checking directory path "/usr/lib/aarch64-linux-gnu/qt5/plugins/platforms/platforms" ...
QFactoryLoader:FactoryLoader() checking directory path "/opt/platforms" ...
loaded library "/usr/lib/aarch64-linux-gnu/qt5/plugins/platforms/libqeglfs.so"
QFactoryLoader:FactoryLoader() checking directory path "/usr/lib/aarch64-linux-gnu/qt5/plugins/platforms/egldeviceintegrations" ...
QFactoryLoader:FactoryLoader() checking directory path "/opt/egldeviceintegrations" ...
No protocol specified
No protocol specified
No protocol specified
Could not initialize egl display
Aborted (core dumped)

启动图形界面，错误信息变成这样了

QFactoryLoader:FactoryLoader() checking directory path "/usr/lib/aarch64-linux-gnu/qt5/plugins/platforms/platforms" ...
QFactoryLoader:FactoryLoader() checking directory path "/opt/platforms" ...
loaded library "/usr/lib/aarch64-linux-gnu/qt5/plugins/platforms/libqeglfs.so"
QFactoryLoader:FactoryLoader() checking directory path "/usr/lib/aarch64-linux-gnu/qt5/plugins/platforms/egldeviceintegrations" ...
QFactoryLoader:FactoryLoader() checking directory path "/opt/egldeviceintegrations" ...
libEGL warning: MESA-LOADER: failed to open rockchip: /usr/lib/dri/rockchip_dri.so: cannot open shared object file: No such file or directory (search paths /usr/lib/aarch64-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri, suffix _dri)

libEGL warning: MESA-LOADER: failed to open rockchip: /usr/lib/dri/rockchip_dri.so: cannot open shared object file: No such file or directory (search paths /usr/lib/aarch64-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri, suffix _dri)

QFactoryLoader:FactoryLoader() checking directory path "/usr/lib/aarch64-linux-gnu/qt5/plugins/platforms/imageformats" ...
QFactoryLoader:FactoryLoader() checking directory path "/opt/imageformats" ...
Unable to query physical screen size, defaulting to 100 dpi.
To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).
EGL Error : Could not create the egl surface: error = 0x300b

Aborted (core dumped)





麻烦各位帮忙看一下，是什么地方出的问题，谢谢了。

YiangYiang

看样子还是获取屏幕那边出了问题，确认过设备编号那便是card0 的dsi1吗？

telantan

确认过的

YiangYiang

这个是终端输入的还是ssh输入的？是不是环境变量的问题

telantan

YiangYiang 发表于 2025-9-26 17:00
这个是终端输入的还是ssh输入的？是不是环境变量的问题

SSH，串口终端都试过了，export环境变量已经加到.bashrc且生效。

YiangYiang

telantan 发表于 2025-9-27 11:07
SSH，串口终端都试过了，export环境变量已经加到.bashrc且生效。

https://forum.qt.io/topic/25253/ ... face-error-0x300b/3
可以试试论坛里面的这种方法修改看看，查了一轮资料都说是屏幕参数或者环境变量的问题

telantan

YiangYiang 发表于 2025-9-27 14:12
https://forum.qt.io/topic/25253/qt5-on-cubieboard-egl-error-could-not-create-the-egl-surface-error ...

谢谢。切换到debian10，现在可以正常显示的。最新的debian12也是不行，有时间的时候我再试一下链接中的方法。