EGLFS Could not open egl display

[PeterVE]

Hello,

Host :
$ uname -a
Linux --- 3.19.0-64-generic #72~14.04.1-Ubuntu SMP Fri Jun 24 17:59:48 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Target :
# uname -a
Linux b2qt-apalis-imx6 3.14.28-v2.6b1+g0bb38d1 #5 SMP Wed Jul 13 10:30:50 EDT 2016 armv7l GNU/Linux

Installed qt-unified-linux-x64-2.0.3-2-online.run with Qt 5.7 and Apalix-iMX6.

rootfs built from 'meta-boot2qt/recipes-qt/images/b2qt-embedded-qt5-image.bb'.

Build Configuration:
BB_VERSION = "1.28.0"
BUILD_SYS = "x86_64-linux"
NATIVELSBSTRING = "Ubuntu-14.04"
TARGET_SYS = "arm-poky-linux-gnueabi"
MACHINE = "apalis-imx6"
DISTRO = "b2qt"
DISTRO_VERSION = "2.0.1"
TUNE_FEATURES = "arm armv7a vfp thumb neon callconvention-hard"
TARGET_FPU = "vfp-neon"
meta
meta-yocto = "HEAD:b1f23d1254682866236bfaeb843c0d8aa332efc2 "
meta-toradex = "HEAD:eca5937408c75a997b160bd1b92e1496b07421cf "
meta-fsl-arm = "HEAD:8d22b44716fa624ff87383c36d222d9e28d0b267 "
meta-fsl-arm-extra = "HEAD:8fdde39f732be9e1ee9505a04c579073114459e7 "
meta-oe
meta-python
meta-networking
meta-initramfs
meta-multimedia = "HEAD:dc5634968b270dde250690609f0015f881db81f2 "
meta-boot2qt
meta-fsl-extras
meta-toradex-extras = "<unknown>:<unknown>"
meta-mingw = "HEAD:2844575c17f3875aa2ad0e83d600f52a1893390d "
meta-qt5 = "HEAD:2746cdba75f411541d80ddfd5cadad2753fe29d3 "

Now upon installing this from direct 'bitbake b2qt-embedded-qt5-image', I expected the device to boot to the default Qt demo. It does not. I placed my app onto the system that was working with 5.5 and 5.6 that obviously used other earlier distros, things did work on this same board.

"unknown[0]: 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
unknown[0]: Could not open egl display
Aborted"

I have updated the /etc/appcontroller.conf file and added the ..NO_FB.. suggestion and removed the ..FB=2.. as well. I rebooted and the same results. Here is that file and the paths are correct.

env=QT_QPA_PLATFORM=eglfs
env=QT_QPA_PLATFORM_PLUGIN_PATH=/usr/lib/plugins/platforms
#env=FB_MULTI_BUFFER=2
env=QT_QPA_EGLFS_WIDTH=1920
env=QT_QPA_EGLFS_HEIGHT=1080
env=QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER=1
env=QML2_IMPORT_PATH=/data/user/qt/qmlplugins
env=QT_IM_MODULE=qtvirtualkeyboard
env=QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/event0
env=QT_GSTREAMER_CAMERABIN_VIDEOSRC=mxc_v4l2=imxv4 l2videosrc,v4l2src
env=QT_QUICK_CONTROLS_STYLE=Flat
env=XDG_RUNTIME_DIR=/tmp
base=linux
platform=apalis-imx6

I have done 'ldd' and everything is found. I do know that the boot2qt.service "stuff" is all in place. Also...

"cat /proc/cmdline"
enable_wait_mode=off vmalloc=400M ip=off root=/dev/mmcblk0p2 rw,noatime rootfstype=ext3 rootwait fec_mac=00:14:2d:49:e5:6e consoleblank=0 no_console_suspend=1 console=tty1 console=ttymxc0,115200n8 mxc_hdmi.only_cea=1 video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24 video=mxcfb1ff video=mxcfb2ff video=mxcfb3ff fbmem=32M

This is probably more info than needed. I am trying to figure this out on my own and am at the end of what I know and am looking for help. I am learning this boot2qt stuff and am unsure what I should be looking for in this video chain that may be broken.

I appreciate your time, thank you.

Cheers,
Pete

---

Added after 46 minutes:

UPDATE1:

/etc/systemd/system/multi-user.target.wants# cat b2qt.service
[Unit]
Description=B2Qt user application
After=systemd-user-sessions.service
ConditionPathExists=/usr/bin/b2qt

[Service]
ExecStart=-/usr/bin/appcontroller /usr/bin/b2qt

[Install]
WantedBy=multi-user.target

/etc/systemd/system/multi-user.target.wants# /usr/bin/appcontroller /usr/bin/b2qt
"QML2_IMPORT_PATH" "/data/user/qt/qmlplugins"
"QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER" "1"
"QT_GSTREAMER_CAMERABIN_VIDEOSRC" "mxc_v4l2=imxv4l2videosrc,v4l2src"
"QT_IM_MODULE" "qtvirtualkeyboard"
"QT_QPA_EGLFS_HEIGHT" "1080"
"QT_QPA_EGLFS_WIDTH" "1920"
"QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS" "/dev/input/event0"
"QT_QPA_PLATFORM" "eglfs"
"QT_QPA_PLATFORM_PLUGIN_PATH" "/usr/lib/plugins/platforms"
"QT_QUICK_CONTROLS_STYLE" "Flat"
"XDG_RUNTIME_DIR" "/tmp"
"/usr/bin/b2qt" ()
Failed to start
Binary does not exist.





/etc/systemd/system/multi-user.target.wants# cat qtlauncher.service
[Unit]
Description=B2Qt Launcher Demo
After=systemd-user-sessions.service
ConditionPathExists=!/usr/bin/b2qt

[Service]
ExecStart=-/usr/bin/appcontroller /usr/bin/qtlauncher --applications-root /data/user/qt

[Install]
WantedBy=multi-user.target

/etc/systemd/system/multi-user.target.wants# /usr/bin/appcontroller /usr/bin/qtlauncher --applications-root /data/user/qt
"QML2_IMPORT_PATH" "/data/user/qt/qmlplugins"
"QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER" "1"
"QT_GSTREAMER_CAMERABIN_VIDEOSRC" "mxc_v4l2=imxv4l2videosrc,v4l2src"
"QT_IM_MODULE" "qtvirtualkeyboard"
"QT_QPA_EGLFS_HEIGHT" "1080"
"QT_QPA_EGLFS_WIDTH" "1920"
"QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS" "/dev/input/event0"
"QT_QPA_PLATFORM" "eglfs"
"QT_QPA_PLATFORM_PLUGIN_PATH" "/usr/lib/plugins/platforms"
"QT_QUICK_CONTROLS_STYLE" "Flat"
"XDG_RUNTIME_DIR" "/tmp"
"/usr/bin/qtlauncher" ("--applications-root", "/data/user/qt")
Could not open egl display
Application crashed: /usr/bin/qtlauncher
Process stopped
quit

[PeterVE]

According to the kernel command line, there should be at least /dev/mxcfb0. Or am I misunderstanding something? The video0-7 is my pcie card. The 16 and 17 are v4l2 outputs.


root@b2qt-apalis-imx6:~# ls /dev/
autofs fb1 i2c-2 loop2 mmcblk0p1 port ram13 ram9 stderr tty14 tty23 tty32 tty41 tty50 tty6 ttymxc3 vcs3 vcsa6 video6
block fd i2c-3 loop3 mmcblk0p2 pps0 ram14 random stdin tty15 tty24 tty33 tty42 tty51 tty60 ttymxc4 vcs4 vga_arbiter video7
bus full iio:device0 loop4 mmcblk1 ptmx ram15 rfkill stdout tty16 tty25 tty34 tty43 tty52 tty61 ubi_ctrl vcs5 video0 watchdog
char fuse initctl loop5 mmcblk1p1 ptp0 ram2 rtc tty tty17 tty26 tty35 tty44 tty53 tty62 uinput vcs6 video1 zero
console galcore input loop6 mxc_hdmi pts ram3 rtc0 tty0 tty18 tty27 tty36 tty45 tty54 tty63 urandom vcsa video16
cpu_dma_latency hidraw0 kmsg loop7 mxc_ipu ram0 ram4 rtc1 tty1 tty19 tty28 tty37 tty46 tty55 tty7 usb-ffs vcsa1 video17
cuse hidraw1 log mem mxc_vpu ram1 ram5 shm tty10 tty2 tty29 tty38 tty47 tty56 tty8 v4l vcsa2 video2
disk hwrng loop-control mmcblk0 network_latency ram10 ram6 snd tty11 tty20 tty3 tty39 tty48 tty57 tty9 vcs vcsa3 video3
dri i2c-0 loop0 mmcblk0boot0 network_throughput ram11 ram7 spidev0.0 tty12 tty21 tty30 tty4 tty49 tty58 ttymxc0 vcs1 vcsa4 video4
fb0 i2c-1 loop1 mmcblk0boot1 null ram12 ram8 spidev1.0 tty13 tty22 tty31 tty40 tty5 tty59 ttymxc1 vcs2 vcsa5 video5


root@b2qt-apalis-imx6:/data/user/mcs# cat /proc/cmdline
enable_wait_mode=off vmalloc=400M ip=off root=/dev/mmcblk0p2 rw,noatime rootfstype=ext3 rootwait fec_mac=00:14:2d:49:e5:6e consoleblank=0 no_console_suspend=1 console=tty1 console=ttymxc0,115200n8 mxc_hdmi.only_cea=1 video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24 video=mxcfb1ff video=mxcfb2ff video=mxcfb3ff fbmem=32M


Device Tree issue? I've tried a couple but will look deeper.

[PeterVE]

Issue Resolved. I am disappointed to learn that it is not my fault that this happened. According to QTBUG-54750, the issue is because there are updated libraries that the kernel uses (for the 3.14.52 kernel) in the rootfs paired with an old kernel (3.14.28) as default. Upgrading only the kernel to 3.14.52 works. The Qt 5.7 release was not tested with the Apalis-iMX6 before it was released even though it is a supported platform.

[anda_skoa]

Are you sure that this specific Linux version is one of the tested ones?

Sounds like a board vendor specific image/distribution.

Cheers,
_

[oldFox64]

I also used Yocto to build Qt SDK (meta-qt5 krogoth) and I have the same error but I'm using a newer kernel

Linux cm-fx6-evk 4.1.15-cl-1.0+g77f6154 #1 SMP PREEMPT Tue Nov 8 17:20:40 CET 2016 armv7l armv7l armv7l GNU/Linux

Having exported:
QT_QPA_PLATFORM=eglfs
DISPLAY=:0.0

Any idea what is failing?