Re: QtwaylandCompositor initialize error

["Zhou, Mingying" <zhoumy@xxxxxxxxxxxxxx>]

> On Thu, 20 Jun 2019 12:17:34 +0000
> "Zhou, Mingying" <zhoumy@xxxxxxxxxxxxxx> wrote:
> 
> > 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?
> 
> Hi Mingying,
> 
> The weston socket is in /run/platform/display/wayland-0
> 
> During normal boot, a user session is initialized for running
> applications. The creation of this user session normally creates the
> link /run/user/UID/wayland-O -> /run/platform/display/wayland-O
> 
> Using SSH or console, when I boot on master, I see the link created for
> root.
> 

Hi José

Thanks for your reply.

"/run/user/UID/wayland-O " file is created when reboot .
This file is  created by Weston.
My Goal is replace Weston by QtWaylandCompositor(example: minimal-qml),
So I run the command "killall weston" to stop Weston.
When I stop the Weston, the file "/run/user/UID/wayland-O " disappeared.
So when I run the command "./minimal-qml -platform eglfs", error message is output and aborted.
I guess a Qt program may create the socket file "/run/user/UID/wayland-O ", but I do not know which program.
If as Weston, ./minimal-qml should first create the socket file then connect it, but now it seems connect it first.

Best regard
Zhou Mingying
> 
> 
> > 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/libibusplatforminputcontextplugi
> n.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
> > -----------------------------------------------------------------------------
> >
> >
> >
> >
> 
> 



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