QtwaylandCompositor initialize error

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Hi

When I use the example code minimal-qml(qtwaylandcompositor example), 
The bellow error message is output.
-------------
m3ulcb:~/wayland/minimal-qml#killall weston
m3ulcb:~/wayland/minimal-qml# ./minimal-qml -platform eglfs
Could not initialize egl display
Aborted (core dumped)
-------------

And I check the reason is that file "/run/user/0/wayland-0" is not found.
The strace detail is appendix "strace.log".
Do anyone met the same problem before?
Or Can you give me any advice to deal with this problem?


The below is the details
1 Before I run the command ./minimal-qml, 
  I add the eglfs to qtbase_%.bbappend, and make new agl-demo-platform image.
- PACKAGECONFIG_GL = "${@bb.utils.contains('DISTRO_FEATURES', 'opengl', 'gles2', '', d)}"
+ PACKAGECONFIG_GL = "${@bb.utils.contains('DISTRO_FEATURES', 'opengl', 'gles2 eglfs', '', d)}"

2 After building image, I write it to a sd card, and start AGL. 
And I check that the eglfs plugin is installed.(See below )
-------------------------------------------------------
m3ulcb:~/wayland/minimal-qml# rpm -ql qtbase-plugins-5.9.7+git0+81b29a44d2-r0.aarch64
/usr
/usr/lib
/usr/lib/qt5
/usr/lib/qt5/plugins
/usr/lib/qt5/plugins/bearer
/usr/lib/qt5/plugins/bearer/libqconnmanbearer.so
/usr/lib/qt5/plugins/bearer/libqgenericbearer.so
/usr/lib/qt5/plugins/bearer/libqnmbearer.so
/usr/lib/qt5/plugins/egldeviceintegrations
/usr/lib/qt5/plugins/egldeviceintegrations/libqeglfs-emu-integration.so
/usr/lib/qt5/plugins/generic
/usr/lib/qt5/plugins/generic/libqevdevkeyboardplugin.so
/usr/lib/qt5/plugins/generic/libqevdevmouseplugin.so
/usr/lib/qt5/plugins/generic/libqevdevtabletplugin.so
/usr/lib/qt5/plugins/generic/libqevdevtouchplugin.so
/usr/lib/qt5/plugins/generic/libqtuiotouchplugin.so
/usr/lib/qt5/plugins/imageformats
/usr/lib/qt5/plugins/imageformats/libqjpeg.so
/usr/lib/qt5/plugins/platforminputcontexts
/usr/lib/qt5/plugins/platforminputcontexts/libibusplatforminputcontextplugin.so
/usr/lib/qt5/plugins/platforms
/usr/lib/qt5/plugins/platforms/libqeglfs.so
/usr/lib/qt5/plugins/platforms/libqminimal.so
/usr/lib/qt5/plugins/platforms/libqminimalegl.so
/usr/lib/qt5/plugins/platforms/libqoffscreen.so
/usr/lib/qt5/plugins/platforms/libqvnc.so
/usr/lib/qt5/plugins/sqldrivers
/usr/lib/qt5/plugins/sqldrivers/libqsqlite.so
-------------------------------------------------------

2 the env of my environment is 
-------------
m3ulcb:~# export QT_QPA_EGLFS_KMS_CONFIG="/etc/kms.conf"					
m3ulcb:~# export XDG_RUNTIME_DIR=/run/user/0					
m3ulcb:~# env					
LD_LIBRARY_PATH=/usr/lib					
EDITOR=vi					
XDG_SESSION_ID=c1					
HUSHLOGIN=FALSE					
USER=root					
PWD=/home/0					
HOME=/home/0					
QT_QPA_EGLFS_KMS_CONFIG=/etc/kms.conf					
MAIL=/var/spool/mail/root					
SHELL=/bin/sh					
TERM=xterm					
SHLVL=1					
QT_QPA_PLATFORM=wayland					
LOGNAME=root					
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/0/bus					
XDG_RUNTIME_DIR=/run/user/0					
PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin					
PS1=\h:\w\$					
_=/usr/bin/env	
---------------------



Best regards, Zhou Mingying
-----------------------------------------------------------------------------
Nanjing Fujitsu Nanda Software Tech. Co., Ltd.(FNST)
No.6 Wenzhu Road, Nanjing, 210012, China
TEL: +86+25-86630566-8498
COINS: 79988498
FAX: +86+25-83317685
Mail: zhoumy@xxxxxxxxxxxxxx
-----------------------------------------------------------------------------




Attachment: Strace.log
Description: Strace.log

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