Failed to create view controller (DRM backend)

[fayfive]

I follow your steps to cross compile with docker.
When I run it on the board, I find that Failed to create view controller FLUTTER_LOG_LEVELS=TRACE FLUTTER_DRM_DEVICE="/dev/dri/card1" /root/bundle/elinux --bundle=/root/bundle
My CPU is rk3568 and my build command flutter-elinux build elinux --target-arch=arm64 --target-sysroot=~/ubuntu18-arm64-sysroot/ --target-backend-type=gbm

[HidenoriMatsubayashi]

You should paste your log.

[fayfive]

I have FLUTTER_LOG_LEVELS=TRACE . But it just print Failed to create view controller.
or where is the log?

[root@RK356X:~/bundle]# FLUTTER_LOG_LEVELS=TRACE FLUTTER_DRM_DEVICE="/dev/dri/ca
rd1" /root/bundle/elinux  --bundle=/root/bundle
Failed to create view controller.

[HidenoriMatsubayashi]

Please use debug builds.

flutter-elinux build elinux --target-arch=arm64 --target-sysroot=~/ubuntu18-arm64-sysroot/ --target-backend-type=gbm --debug

[fayfive]

HA! I see ^_^

[root@RK356X:~/bundle]# FLUTTER_LOG_LEVELS=TRACE FLUTTER_DRM_DEVICE="/dev/dri/ca
rd1" /root/bundle/elinux  --bundle=/root/bundle
[ERROR][ConfigureDisplay(53)] Couldn't get resources
[ERROR][CreateRenderSurface(118)] Failed to create the native window
Failed to create view controller.

[HidenoriMatsubayashi]

According to the log message, drmModeGetResources failed. I don't know your device, "/dev/dri/card1" is correct?

[fayfive]

I have tried

[root@RK356X:~/bundle]# FLUTTER_LOG_LEVELS=TRACE FLUTTER_DRM_DEVICE="/dev/dri/ca
rd0" /root/bundle/elinux  --bundle=/root/bundle
[INFO][ConfigureDisplay(71)] resolution: 1280x800
/root/bundle/elinux: symbol lookup error: /root/bundle/lib/libflutter_elinux_gbm.so: undefined symbol: drmIsMaste

But there is error drmIsMaste
It seem to be right when you said that

"/dev/dri/card1" is correct

[HidenoriMatsubayashi]

Can you please comment-out drmIsMaster in https://github.com/sony/flutter-embedded-linux/blob/master/src/flutter/shell/platform/linux_embedded/window/native_window_drm_gbm.cc#L29 and try again?

[HidenoriMatsubayashi]

Or can you update your kernel version to more newest version?

[fayfive]

Or can you update your kernel version to more newest version?

Linux RK356X 4.19.206
Maybe I can't update. Because I don't have all the drivers of this official kernel.

I just want to see the result of elinux flutter. So I don't compile it.

I see it has no the api. Can I update the libdrm to fix it?

[HidenoriMatsubayashi]

I think the first one is easier than building of the libdrm. Can you try it? After modifying the source file, you can build libflutter_elinux_gbm.so by the following steps in arm64 docker, and replace /root/bundle/lib/libflutter_elinux_gbm.so with the new libflutter_elinux_gbm.so.

$ cmake -DBUILD_ELINUX_SO=ON -DBACKEND_TYPE=DRM-GBM -DCMAKE_BUILD_TYPE=Release -DENABLE_ELINUX_EMBEDDER_LOG=ON -DFLUTTER_RELEASE=OFF ..

See also: https://github.com/sony/flutter-embedded-linux/wiki/Building-Embedded-Linux-embedding-for-Flutter#build-shared-library-for-flutter-elinux

[fayfive]

flutter-embedded-linux/build$ cmake -DBUILD_ELINUX_SO=ON -DBACKEND_TYPE=DRM-GBM -DCMAKE_BUILD_TYPE=Release -DENABLE_ELINUX_EMBEDDER_LOG=ON -DFLUTTER_RELEASE=OFF ..
-- The CXX compiler identification is Clang 14.0.0
-- The C compiler identification is Clang 14.0.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/clang++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/clang - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.2") 
-- Checking for module 'egl'
--   No package 'egl' found
CMake Error at /usr/share/cmake-3.22/Modules/FindPkgConfig.cmake:603 (message):
  A required package was not found
Call Stack (most recent call first):
  /usr/share/cmake-3.22/Modules/FindPkgConfig.cmake:825 (_pkg_check_modules_internal)
  cmake/package.cmake:6 (pkg_check_modules)
  CMakeLists.txt:41 (include)


-- Configuring incomplete, errors occurred!
See also "/home/alfred/working/da/flutter-embedded-linux/build/CMakeFiles/CMakeOutput.log".

Do I need to set the sysroot?

[HidenoriMatsubayashi]

See https://github.com/sony/flutter-embedded-linux/wiki/Installing-dependent-libraries

[fayfive]

I need to cross compile, it seem to have no sysroot option?

[HidenoriMatsubayashi]

After modifying the source file, you can build libflutter_elinux_gbm.so by the following steps in arm64 docker,

Simply, you can build .so file for arm64 on arm64 docker. No sysroot as it's self build on arm64.

[fayfive]

That means I must put the source to the docker, and compile it?

[HidenoriMatsubayashi]

Yes, that's right. Because it's easy to build than cross-buildings.

[fayfive]

HA! It's too slow.

[ 94%] Building CXX object CMakeFiles/flutter_elinux_gbm.dir/src/flutter/shell/platform/common/client_wrapper/standard_codec.cc.o
make[2]: *** No rule to make target 'libflutter_engine.so', needed by 'libflutter_elinux_gbm.so'.  Stop.
make[2]: *** Waiting for unfinished jobs....
[ 97%] Building CXX object CMakeFiles/flutter_elinux_gbm.dir/src/flutter/shell/platform/common/client_wrapper/plugin_registrar.cc.o
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/flutter_elinux_gbm.dir/all' failed
make[1]: *** [CMakeFiles/flutter_elinux_gbm.dir/all] Error 2
Makefile:129: recipe for target 'all' failed
make: *** [all] Error 2

But it's failed

[HidenoriMatsubayashi]

Please copy libflutter_engine.so (aarch64 version) to current directory in the docker.

[fayfive]

[root@RK356X:~/bundle]# FLUTTER_LOG_LEVELS=TRACE FLUTTER_DRM_DEVICE="/dev/dri/ca
rd0" /root/bundle/elinux  --bundle=/root/bundle
[INFO][ConfigureDisplay(71)] resolution: 1280x800
[ERROR][EnvironmentEgl(22)] Failed to get the EGL display: eglGetError: EGL_SUCCESS
[ERROR][ContextEgl(33)] Failed to choose EGL surface config: eglGetError: EGL_BAD_DISPLAY
[ERROR][CreateOnscreenSurface(71)] Failed to create EGL window surface: eglGetError: EGL_BAD_DISPLAY
Failed to create view controller.

[HidenoriMatsubayashi]

eglGetDisplay failed on your device, but I'm not sure why it failed. Your device supports OpenGL ES and EGL?

[fayfive]

[ERROR][EnvironmentEgl(22)] Failed to get the EGL display: eglGetError: EGL_SUCCESS this one is error?

[HidenoriMatsubayashi]

Yes.

[fayfive]

The device has tow cards card0 and card1

[HidenoriMatsubayashi]

Have you set DISPLAY env? Also x11 or wayland is running on your device?

[fayfive]

[root@RK356X:~/bundle]# env
USER=root
GST_V4L2_PREFERRED_FOURCC=NV12:YU12:NV16:YUY2
WESTON_DISABLE_ATOMIC=1
WESTON_DRM_DISABLE_MODIFIER=1
SHLVL=3
OLDPWD=/
HOME=/
PIXMAN_USE_RGA=1
PAGER=/bin/more 
GST_VIDEO_CONVERT_USE_RGA=1
PS1=[\u@\h:\w]# 
QT_GSTREAMER_PLAYBIN=playbin3
QT_GSTREAMER_WIDGET_VIDEOSINK=waylandsink
TERM=vt102
WESTON_DRM_KEEP_RATIO=1
GST_VIDEO_CONVERT_PREFERRED_FORMAT=NV12:NV16:I420:YUY2
PATH=/bin:/sbin:/usr/bin:/usr/sbin
XDG_RUNTIME_DIR=/var/run
GST_DEBUG_NO_COLOR=1
GST_V4L2_USE_LIBV4L2=1
SHELL=/bin/sh
storagemedia=emmc
PWD=/root/bundle
QT_QPA_PLATFORM=wayland
WESTON_DRM_MIRROR=1
PREFERED_VIDEOSINK=waylandsink
QT_GSTREAMER_WINDOW_VIDEOSINK=waylandsink
GST_VIDEO_FLIP_USE_RGA=1
EDITOR=/bin/vi

Is it here?
I don't know how to see what you said.
The default demo is weston qt.

I find that if I turn on weston and the elinux change to flutter_wayland.so . It works well. That means it has wayland?
And I find that cpu is high performance.

[HidenoriMatsubayashi]

Did you stop Wayland & Weston before running flutter for DRM? see https://github.com/sony/flutter-embedded-linux/wiki/How-to-run-Flutter-apps#2-run-with-drm-backend

[HidenoriMatsubayashi]

And I find that cpu is high performance.

Because you are using debug mode.

[fayfive]

if flutter_wayland.so I don't stop the weston.
if flutter_gbm.so I stop the weston, but I don't know how to stop wayland.

[HidenoriMatsubayashi]

see https://github.com/sony/flutter-embedded-linux/wiki/How-to-run-Flutter-apps#2-run-with-drm-backend

[fayfive]

see https://github.com/sony/flutter-embedded-linux/wiki/How-to-run-Flutter-apps#2-run-with-drm-backend

I see that $ Ctrl + Alt + F3 # Switching to CUI but I am elinux not ubuntu. I stop weston is ok? Ctrl + Alt + F3 doesn't work for the system.

[HidenoriMatsubayashi]

Yes. Please don't launch any window manager using DRM.

[fayfive]

Yes. Please don't launch any window manager using DRM.

But it'still

[root@RK356X:~/bundle]# FLUTTER_LOG_LEVELS=TRACE FLUTTER_DRM_DEVICE="/dev/dri/ca
rd0" /root/bundle/elinux  --bundle=/root/bundle
[INFO][ConfigureDisplay(71)] resolution: 1280x800
[ERROR][EnvironmentEgl(22)] Failed to get the EGL display: eglGetError: EGL_SUCCESS
[ERROR][ContextEgl(33)] Failed to choose EGL surface config: eglGetError: EGL_BAD_DISPLAY
[ERROR][CreateOnscreenSurface(71)] Failed to create EGL window surface: eglGetError: EGL_BAD_DISPLAY
Failed to create view controller.

_

[HidenoriMatsubayashi]

Hmm, I'm afraid that I have no idea to resolve it. It would be great if you investigate/debug this issue.

[fayfive]

It seem that src/flutter/shell/platform/linux_embedded/surface/environment_egl_stream.cc is not compiled, I can't see environment_egl_stream.cc.o?
Which option can compile it?

[sullivanj91]

Hi I'm getting a very similar issue when trying to run inside a docker container on a Jetson Nano host. Here is my command/output:

ag@g010-0101-nano:~/mobile/dashboard$ ./build/elinux/arm64/debug/bundle/dashboard 
[WARNING][CreateRenderSurface(111)] FLUTTER_DRM_DEVICE is not set, use /dev/dri/card0
[ERROR][NativeWindowDrm(22)] Couldn't open /dev/dri/card0
[ERROR][CreateRenderSurface(118)] Failed to create the native window
Failed to create view controller.

But the card0 device is mounted to the container:

ag@g010-0101-nano:~/mobile/dashboard$ ls /dev/dri/
card0  renderD128

Is there anything else i can provide to help debug?

[HidenoriMatsubayashi]

Can you try the same thing outside the docker container?

[sullivanj91]

Looks like it was a permission issue, I added --group-add=video to my docker run and now it displays. However the container is not able to capture touchscreen input events even with --device=/dev/input/ --group-add=input mounted.

Can you try the same thing outside the docker container?

Both display and input are working when running outside of the container.

[HidenoriMatsubayashi]

Okay. BTW, which JetPack version are you using?

[sullivanj91]

After some more debugging this is another permission issue it seems. Added -v /run/udev/data:/run/udev/data to give libinput ability to list devices and then the output is:

[ERROR][operator()(208)] Failed to open /dev/input/event0, error: Permission denied
[ERROR][operator()(208)] Failed to open /dev/input/event2, error: Permission denied
[ERROR][operator()(208)] Failed to open /dev/input/event1, error: Permission denied

I then added --user root and it worked. Trying to figure out now how to give other users permission. --group-add=input is insufficient.

which JetPack version are you using?

Jetpack is 4.9.253-tegra

[HidenoriMatsubayashi]

Thanks for the information.

[fayfive]

Hi I'm getting a very similar issue when trying to run inside a docker container on a Jetson Nano host. Here is my command/output:

ag@g010-0101-nano:~/mobile/dashboard$ ./build/elinux/arm64/debug/bundle/dashboard 
[WARNING][CreateRenderSurface(111)] FLUTTER_DRM_DEVICE is not set, use /dev/dri/card0
[ERROR][NativeWindowDrm(22)] Couldn't open /dev/dri/card0
[ERROR][CreateRenderSurface(118)] Failed to create the native window
Failed to create view controller.

But the card0 device is mounted to the container:

ag@g010-0101-nano:~/mobile/dashboard$ ls /dev/dri/
card0  renderD128

Is there anything else i can provide to help debug?

@sullivanj91
Hello! How can you get the path /dev/dri/card0 on jetson? I can't find the path.
Here is the link that jetson doesn't have the "/dev/dri/card0".
https://forums.developer.nvidia.com/t/why-doesnt-jetson-have-the-directory-of-dev-dri-drm/218578
I'm using jp4.3 and jp4.6

[lizy-coding]

I also ran into this problem, which was eventually solved by finding the right graphical library, my device is
rk3568
SO：Debain 10 aarch64
GPU：libmali-bifrost-g52-g2p0-x11.so
Belongs to the x11 graphical library
Projects generated by
flutter-elinux build elinux --target-arch=arm64 --target-sysroot=/ --target-backend-type=x11 --verbose
will work