Qt5.8 for arm:Could not open egl display

[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