Qt5.8 for arm:Could not open egl display

hflw

Yes,the error still exists,the config DISTRO_FEATURES_append and IMAGE_INSTALL_append dont work. I don't have a Qt commercial license.Maybe I need to analyse the Qt source.

aV_V

@hflw said in Qt5.8 for arm:Could not open egl display:

Yes,the error still exists,the config DISTRO_FEATURES_append and IMAGE_INSTALL_append dont work. I don't have a Qt commercial license.Maybe I need to analyse the Qt source.

I would try first to prove that your GPU is "enabled", and by this I mean to run an OpenGL application and check that you effectively have the right packages. After proving that you gpu is working then you should look why the Qt application is failing.

Btw, did you tried to install this package?

qtbase-examples

Do it if you haven't and try to run your qt application after that. It will install all the missing dependencies, this is how I discovered my missing packages.

hflw

@aV_V Studying code makes me headache.I almost lost my confidence.Do u have an OpenGL application?

I find the key "qtbase" in the folder ipk:

./cortexa9hf-neon-mx6qdl/qtbase-plugins_5.8.0+git0+49dc9aa409-r0_cortexa9hf-neon-mx6qdl.ipk
./cortexa9hf-neon-mx6qdl/qtbase-tools_5.8.0+git0+49dc9aa409-r0_cortexa9hf-neon-mx6qdl.ipk
./cortexa9hf-neon-mx6qdl/qtbase-dbg_5.8.0+git0+49dc9aa409-r0_cortexa9hf-neon-mx6qdl.ipk
./cortexa9hf-neon-mx6qdl/qtbase-doc_5.8.0+git0+49dc9aa409-r0_cortexa9hf-neon-mx6qdl.ipk
./cortexa9hf-neon-mx6qdl/qtbase-mkspecs_5.8.0+git0+49dc9aa409-r0_cortexa9hf-neon-mx6qdl.ipk
./cortexa9hf-neon-mx6qdl/qtbase_5.8.0+git0+49dc9aa409-r0_cortexa9hf-neon-mx6qdl.ipk
./cortexa9hf-neon-mx6qdl/qtbase-dev_5.8.0+git0+49dc9aa409-r0_cortexa9hf-neon-mx6qdl.ipk
./cortexa9hf-neon-mx6qdl/qtbase-lic_5.8.0+git0+49dc9aa409-r0_cortexa9hf-neon-mx6qdl.ipk
./cortexa9hf-neon-mx6qdl/qtbase-staticdev_5.8.0+git0+49dc9aa409-r0_cortexa9hf-neon-mx6qdl.ipk

no "qtbase-examples",So i add "qtbase-examples" to IMAGE_INSTALL_append in local.conf,But when bitbake,the error:

Couldn't find anything to satisfy 'qtbase-examples'

May I know your Yocto Version?

hflw

@aV_V I strace the Qt app with cmd "strace",get detail infomation:

...
open("/dev/galcore",O_RDWR) ....... ENOTTY(Inappropriate ioctl for device)
...

So I think the kernel config maybe not right.

Andrey Shmelew

please do:

root@YOURBOARD: apt-get update
root@YOURBOARD: apt-get upgrade
root@YOURBOARD: apt-cache search qt5 (here is list of cached modules)
root@YOURBOARD: apt-get install qt5-default
.....
root@YOURBOARD: apt-get install all_needed_modules

should working

hflw

hi,@Andrey-Shmelew

the apt-get don't have source list. do you know the source address?

Andrey Shmelew

sorry , i don't know

aV_V

I'm sorry for the absence, was busy.

@hflw said in Qt5.8 for arm:Could not open egl display:

no "qtbase-examples",So i add "qtbase-examples" to IMAGE_INSTALL_append in local.conf,But when bitbake,the error:
Couldn't find anything to satisfy 'qtbase-examples'

Do

PACKAGECONFIG_append_pn-qtbase = " examples"
IMAGE_INSTALL_append = " qtbase-examples"

To debug Qt backends is better to use this:

export QT_QPA_DEBUG=1
export QT_LOGGING_RULES="qt.qpa.*=true"

Regards.

hflw

@aV_V ,I add examples,but still don't work,below is debug info:

root@b2qt-imx6dlsabresd:~# ./qqc2a 
QML debugging is enabled. Only use this in a safe environment.
qt.qpa.egldeviceintegration: EGL device integration plugin keys: ("eglfs_viv")
qt.qpa.egldeviceintegration: EGL device integration plugin keys (sorted): ("eglfs_viv")
qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_viv"
qt.qpa.egldeviceintegration: Using EGL device integration "eglfs_viv"
QEglFSVivIntegration will set environment variable FB_MULTI_BUFFER=2 to enable double buffering and vsync.
 If this is not desired, you can override this via: export QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER=1
Could not open egl display
Aborted (core dumped)

aV_V

@hflw Can you confirm that qtbase-examples has been installed? Do opkg info qtbase-examples and show the output

hflw

@aV_V I decide to update uboot and kernel kept the same version of Yocto.

after I compile yocto,i compare the rootfs file,Something more about qt-examples,I think rootfs is OK

hflw

@aV_V Now it works after I updte the version to 4.1.29 of Linux and 2016-07 of uboot.

Nice weekend！！！

aV_V

@hflw :d nice