i.MX Processors中的主题 Re: Could not open egl display

Could not open egl display

强王 — Thu, 26 Nov 2015 10:09:59 GMT

Qt5_CinematicExperience -platform eglfs

result:

QEglFSImx6Hooks 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

then i set FB_MULTI_BUFFER=2 or QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER=1

result:

root@imx6qsabresd:~# Qt5_CinematicExperience -platform eglfs

Could not open egl display

/usr/bin/Qt5_CinematicExperience: line 4: 432 Aborted /usr/share/cinematicexperience-1.0/Qt5_CinematicExperience $*

root@imx6qsabresd:~#

kernel:3.14.28

Re: Could not open egl display

Bio_TICFSL — Tue, 01 Dec 2015 17:02:04 GMT

Hi Qiang

Did you try export DISPLAY ?

Regards

Re: Could not open egl display

andreykononov — Wed, 02 Mar 2016 12:56:43 GMT

i have the same error, build yocto image jethro + Qt make start script

root@imx6qsabreauto:~# cat /bin/start.sh

#!/bin/sh

export LD_LIBRARY_PATH=/usr/lib

export QML_IMPORT_PATH=/usr/lib/qt5/qml

export QML2_IMPORT_PATH=/usr/lib/qt5/qml

export QT_QPA_PLATFORM_PLUGIN_PATH=/lib/qt5/plugins/platforms

export QT_QPA_EGLFS_PHYSICAL_WIDTH=1920

export QT_QPA_EGLFS_PHYSICAL_HEIGTH=1080

export QT_QPA_PLATFORM=eglfs

#export QT_QPA_EGLFS_FB=/dev/fb2

#export FB_FRAMEBUFFER_0=/dev/fb2

export QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER=1

export DISPLAY=:0.0

Qt5_CinematicExperience

and still have same error

root@imx6qsabreauto:~# start.sh

Could not open egl display

/bin/start.sh: line 12: 458 Aborted Qt5_CinematicExperience

Re: Could not open egl display

aveselinov — Tue, 15 Nov 2016 14:08:02 GMT

OP, could u please explain ur solution? Exporting DISPLAY doesn't work for me.

Re: Could not open egl display

andreykononov — Tue, 13 Dec 2016 11:55:19 GMT

#!/bin/sh
export QT_QPA_EGLFS_FB=/dev/fb0
export FB_FRAMEBUFFER_0=/dev/fb0
export QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER=1
export QT_QPA_EGLFS_FORCEVSYNC=1
export QT_QPA_PLATFORM=eglfs
/home/root/program &

work for me now

Re: Could not open egl display

refiktuzaklı — Thu, 06 Jul 2017 08:22:46 GMT

I have also this problem. I exported Display and applied Andrey's recommendation. it still gives same error could not open display

Re: Could not open egl display

andreykononov — Thu, 06 Jul 2017 08:37:33 GMT

can you show full error log?

i make some changes to unify my scripts

#!/bin/sh
fb=/dev/fb$1
export QT_QPA_FONTDIR=/usr/share/fonts/
export QT_QPA_EGLFS_FORCEVSYNC=1
export QT_QPA_EGLFS_HIDECURSOR=1
export QT_QPA_EGLFS_FB=$fb
export FB_FRAMEBUFFER_0=$fb
export QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER=1
export QT_QPA_PLATFORM=eglfs
export LANG=ru_RU.UTF-8
/path/to/program

now to start program on some display you can set framebuffer number

script.sh 2 &

Re: Could not open egl display

refiktuzaklı — Thu, 06 Jul 2017 11:29:04 GMT

before your script

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

after yourscript

Could not open egl display
Aborted

Re: Could not open egl display

andreykononov — Thu, 06 Jul 2017 12:19:15 GMT

which framebuffer you using?

Re: Could not open egl display

refiktuzaklı — Thu, 06 Jul 2017 12:49:30 GMT

I have check my frame buffer. I have just fb0. I changed fb=/dev/fb$1 with fb=/dev/fb$0 and error :

EGLFS: Failed to open /dev/fb-sh
EGLFS: Can't continue without a display
Aborted

Re: Could not open egl display

andreykononov — Thu, 06 Jul 2017 12:54:38 GMT

for you my script whill be

#!/bin/sh
fb=/dev/fb0
export QT_QPA_FONTDIR=/usr/share/fonts/
export QT_QPA_EGLFS_FORCEVSYNC=1
export QT_QPA_EGLFS_HIDECURSOR=1
export QT_QPA_EGLFS_FB=$fb
export FB_FRAMEBUFFER_0=$fb
export QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER=1
export QT_QPA_PLATFORM=eglfs
export LANG=ru_RU.UTF-8
/path/to/program

show output of this command

cat /sys/class/graphics/fb0/mode

Re: Could not open egl display

refiktuzaklı — Thu, 06 Jul 2017 14:08:47 GMT

same error

Could not open egl display
Aborted

mode file is empty

Re: Could not open egl display

andreykononov — Fri, 07 Jul 2017 04:35:28 GMT

its look like something wrong with your framebuffer driver. What board are you using and what linux on it?

Re: Could not open egl display

refiktuzaklı — Fri, 07 Jul 2017 10:30:25 GMT

linux 4.11.4

board karo tx6u 8033

Re: Could not open egl display

refiktuzaklı — Mon, 10 Jul 2017 08:40:19 GMT

can you show tree under /usr/lib/qt/plugins/egldeviceintegrations

mine is

# cd /usr/lib/qt/plugins/egldeviceintegrations
# tree
.
|-- libqeglfs-kms-egldevice-integration.so
`-- libqeglfs-kms-integration.so
0 directories, 2 files

must there be a libqeglfs_viv something like that? do I have missing file here?

Re: Could not open egl display

andreykononov — Mon, 10 Jul 2017 08:47:03 GMT

root@MMC:~# tree /usr/lib/qt5/plugins/egldeviceintegrations/
/usr/lib/qt5/plugins/egldeviceintegrations/
`-- libqeglfs-viv-integration.so

0 directories, 1 file
root@MMC:~#

Re: Could not open egl display

refiktuzaklı — Mon, 10 Jul 2017 10:16:17 GMT

I am using buildroot, I select imx-gpu-viv and qt5 egl support. however egl vivante integration is missing. I gues there is bug on integration of vivante for buildroot.

thank you Andrey

Re: Could not open egl display

andreykononov — Mon, 10 Jul 2017 10:19:59 GMT

i'm using yocto, you can try it

Re: Could not open egl display

refiktuzaklı — Mon, 10 Jul 2017 10:39:53 GMT

yes I want to switch to yocto too, because imx does not support buildroot also buildroot community is not so wide as yocto. do you have any suggestion where to start?

Re: Could not open egl display

andreykononov — Mon, 10 Jul 2017 12:46:31 GMT

i think better way to start from here, but take pyro branch, not dora like on this link, other the same