kivy: Segmentation fault in Raspberry 3B+

Versions

Python: 3.5.3
OS: Raspbian GNU/Linux 9.4 (stretch)
Kivy: v1.11.0.dev0, git-916b77b, 20181022
Kivy installation method: sudo pip3 install git+https://github.com/kivy/kivy.git@master

Description

I am trying to execute the demo app_with_kv.py but it shows a segmentation fault error always. I am using the TFT screen from here.

Code and Logs

[INFO   ] [Logger      ] Record log in /home/pi/.kivy/logs/kivy_18-10-22_12.txt
[INFO   ] [Kivy        ] v1.11.0.dev0, git-916b77b, 20181022
[INFO   ] [Python      ] v3.5.3 (default, Sep 27 2018, 17:25:39) 
[GCC 6.3.0 20170516]
[INFO   ] [Factory     ] 184 symbols loaded
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_sdl2, img_pil, img_gif (img_ffpyplayer ignored)
[INFO   ] [Text        ] Provider: sdl2
[INFO   ] [Window      ] Provider: egl_rpi
[INFO   ] [GL          ] Using the "OpenGL ES 2" graphics system
[INFO   ] [GL          ] Backend used <sdl2>
Segmentation fault

About this issue

Original URL
State: closed
Created 6 years ago
Reactions: 9
Comments: 44 (11 by maintainers)

Links to this issue

can not able to solve this error, can any one help!!

Most upvoted comments

Had similar issue with it. For some reason, sdl2 is called instead of the gl for Backend. I do not know if there is a permanent fix for this, but after some time trying to find a fix, the only solution I could come up with is this to add 2 lines on top of your app, before you import Kivy. Should look like this:

import os
os.environ['KIVY_GL_BACKEND'] = 'gl'
import kivy

Hope it will help. Good luck!

P.s. If you want to run your app on Windows you might want to comment os.environ['KIVY_GL_BACKEND'] = 'gl' otherwise it will not run.

+15

Wtfunqt on Oct 23, 2018

OK, look like SDL_GL_GetProcAddress can’t find anything 😦 I understand now. Our method to detect and load opengl is tied to the Window provider used. But in this case, egl_rpi is used, not SDL2, therefore the SDL2 function will not work.

It requires a fix, thanks for reporting!

tito on Oct 27, 2018

I also confirm that @goadik 's solution works! And I also point out that as it is an environment variable problem, you can simply export the variable as follows:

export KIVY_GL_BACKEND=gl

And then execute the script.

carmilso on Oct 23, 2018

I’m planning to fix it in the post release.

On Wed, Jun 12, 2019, 1:11 PM RafalSkolasinski notifications@github.com wrote:

This definitely qualifies as regression bug. Installing on RPI 3B+ as

pip install git+https://github.com/kivy/kivy.git@1.11.0

renders in Segmentation fault whereas

pip install git+https://github.com/kivy/kivy.git@1.10.1

works like a charm.

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/kivy/kivy/issues/6007?email_source=notifications&email_token=AAMRN7T3A2SZJ5OE4QQ63NDP2EU2XA5CNFSM4F6QJQM2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODXREWFA#issuecomment-501369620, or mute the thread https://github.com/notifications/unsubscribe-auth/AAMRN7XWDPCYLGW5QREDN3DP2EU2XANCNFSM4F6QJQMQ .

matham on Jun 12, 2019

I had simliar problems with the actual raspbian lite os (2020-05-27) --> after first loading I got segmentation fault. Than I tried the switching to ‘gl’. After that I gt a whichte screen and a black cursor without any contesnts from my GUI. If I swiched back to a previusly raspbian lite it works with Kivy 1.11.1. Actually I do not know what exactly is the difference. Seems that there are some updates which cause this issue (libs, firmware…?). I luckily backed up the old sd card and restore it for my actually used GUI. I decided to use Kivy because of the reason that I do not need to install X11. My GUI is running in the console…

AndreasPantle on Jul 17, 2020

To confirm a build using the latest stable (1.11.0) in a fully up to date stretch-lite installation on any RPI causes this segmentation fault. Must build stable-1.10.1 to run on an RPI. I am not sure why you would release a stable that has had this problem on a major platform for over 6 months.

wolfmanjm on Jun 4, 2019

Still no solution to this?

os.environ[‘KIVY_GL_BACKEND’] = 'gl’doesn’t help at all with v1.11.0.dev0, git-9ebad2d, 20190516

Getting: [CRITICAL] [App ] Unable to get a Window, abort

And with older version like 1.10.1 I don’t get any transparent PNG support…all transparent PNGs are drawn with a black background…same code works fine on Debian 9 though …

So will RPi Stretch-Lite never be supported again?

richardklingler on May 16, 2019

Not sure if it is relevant to add here but I think it got something to do with the new version of Raspbian. I tried the older one (I have an image) and it worked like a charm.

The problem with segmentation fault on app start can be fixed with an environment variable, but also, it crashes with the same segmentation fault every time I load the graph with lots of data on it to show.

The problem with GDB is that if I try to use it like that gdb --args python main.py and replicate the crash, RPI just freezes and the only thing left to do at this point is just to restart it. When I check the logs they are empty.

Wanted to add it here.

Wtfunqt on Nov 2, 2018