Kivy Window dangling on_resize issue

[Jacob Mugala]

Hello,

How do i solve the dangling issue in my Kivy app? I have attached the screen-recorded...

Thanks!

[ElliotG]

I'd recommend you check that you have the most recent graphics drivers for your platform.  I do not see that behavior.

[Jacob Mugala]

I am using Ubuntu 24.04.3 LTS

[elli...@cox.net]

What is the graphics hw?  Nvidia, AMD, Intel?  What version of the graphics driver are you running?

Is there a newer version? 

Check the kivy log, what does it say?

On WIndows, on my laptop I see the following:

[INFO   ] [GL          ] Using the "OpenGL" graphics system

[INFO   ] [GL          ] GLEW initialization succeeded

[INFO   ] [GL          ] Backend used <glew>

[INFO   ] [GL          ] OpenGL version <b'4.6.0 - Build 32.0.101.6881'>

[INFO   ] [GL          ] OpenGL vendor <b'Intel'>

[INFO   ] [GL          ] OpenGL renderer <b'Intel(R) Iris(R) Xe Graphics'>

[INFO   ] [GL          ] OpenGL parsed version: 4, 6

[INFO   ] [GL          ] Shading version <b'4.60 - Build 32.0.101.6881'>

---

From: kivy-...@googlegroups.com <kivy-...@googlegroups.com> on behalf of Jacob Mugala <4de...@gmail.com>
Sent: Tuesday, October 28, 2025 12:33 AM
To: Kivy users support <kivy-...@googlegroups.com>
Subject: [kivy-users] Re: Kivy Window dangling on_resize issue

 

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[Jacob Mugala]

/home/mog/PycharmProjects/projectA/.venv/bin/python /home/mog/PycharmProjects/projectA/backroot/main.py
[INFO   ] [Logger      ] Record log in /home/mog/.kivy/logs/kivy_25-11-01_3.txt
[INFO   ] [Kivy        ] v2.3.1
[INFO   ] [Kivy        ] Installed at "/home/mog/PycharmProjects/projectA/.venv/lib/python3.12/site-packages/kivy/__init__.py"
[INFO   ] [Python      ] v3.12.3 (main, Aug 14 2025, 17:47:21) [GCC 13.3.0]
[INFO   ] [Python      ] Interpreter at "/home/mog/PycharmProjects/projectA/.venv/bin/python"
[INFO   ] [Logger      ] Purge log fired. Processing...
[INFO   ] [Logger      ] Purge finished!
[INFO   ] [Factory     ] 195 symbols loaded
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_sdl2, img_pil (img_ffpyplayer ignored)
[INFO   ] [Text        ] Provider: sdl2
[INFO   ] [KivyMD      ] 1.2.0, git-Unknown, 2025-08-11 (installed at "/home/mog/PycharmProjects/projectA/.venv/lib/python3.12/site-packages/kivymd/__init__.py")
[WARNING] [KivyMD      ] Version 1.2.0 is deprecated and is no longer supported. Use KivyMD version 2.0.0 from the master branch (pip install https://github.com/kivymd/KivyMD/archive/master.zip)
[INFO   ] [Window      ] Provider: sdl2

[INFO   ] [GL          ] Using the "OpenGL" graphics system

[INFO   ] [GL          ] Backend used <sdl2>
[INFO   ] [GL          ] OpenGL version <b'4.6 (Compatibility Profile) Mesa 25.0.7-0ubuntu0.24.04.2'>

[INFO   ] [GL          ] OpenGL vendor <b'Intel'>

[INFO   ] [GL          ] OpenGL renderer <b'Mesa Intel(R) HD Graphics 630 (KBL GT2)'>

[INFO   ] [GL          ] OpenGL parsed version: 4, 6

[INFO   ] [GL          ] Shading version <b'4.60'>
[INFO   ] [GL          ] Texture max size <16384>
[INFO   ] [GL          ] Texture max units <32>
[INFO   ] [Window      ] auto add sdl2 input provider
[INFO   ] [Window      ] virtual keyboard not allowed, single mode, not docked
[INFO   ] [Clipboard   ] Provider: sdl2(['clipboard_xclip', 'clipboard_xsel', 'clipboard_dbusklipper', 'clipboard_gtk3'] ignored)
[CRITICAL] [Cutbuffer   ] Unable to find any valuable Cutbuffer provider. Please enable debug logging (e.g. add -d if running from the command line, or change the log level in the config) and re-run your app to identify potential causes
xclip - FileNotFoundError: [Errno 2] No such file or directory: 'xclip'
  File "/home/mog/PycharmProjects/projectA/.venv/lib/python3.12/site-packages/kivy/core/__init__.py", line 59, in core_select_lib
    mod = importlib.__import__(name='{2}.{0}.{1}'.format(
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1466, in __import__
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 995, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/home/mog/PycharmProjects/projectA/.venv/lib/python3.12/site-packages/kivy/core/clipboard/clipboard_xclip.py", line 17, in <module>
    p = subprocess.Popen(['xclip', '-version'], stdout=subprocess.PIPE,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/subprocess.py", line 1026, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/lib/python3.12/subprocess.py", line 1955, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)

xsel - FileNotFoundError: [Errno 2] No such file or directory: 'xsel'
  File "/home/mog/PycharmProjects/projectA/.venv/lib/python3.12/site-packages/kivy/core/__init__.py", line 59, in core_select_lib
    mod = importlib.__import__(name='{2}.{0}.{1}'.format(
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1466, in __import__
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 995, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/home/mog/PycharmProjects/projectA/.venv/lib/python3.12/site-packages/kivy/core/clipboard/clipboard_xsel.py", line 15, in <module>
    p = subprocess.Popen(['xsel', '--version'], stdout=subprocess.PIPE)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/subprocess.py", line 1026, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/lib/python3.12/subprocess.py", line 1955, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)

[DEBUG  ] CACHEDIR=/home/mog/.cache/matplotlib
[DEBUG  ] Using fontManager instance from /home/mog/.cache/matplotlib/fontlist-v390.json
[WARNING] Deprecated property "<NumericProperty name=padding_x>" of object "<com.beeui.titlebar.BeeTitlebarButton object at 0x7d0391644210>" was accessed, it will be removed in a future version
[WARNING] Deprecated property "<NumericProperty name=padding_y>" of object "<com.beeui.titlebar.BeeTitlebarButton object at 0x7d0391644210>" was accessed, it will be removed in a future version
[INFO   ] [GL          ] NPOT texture support is available
[WARNING] Both Window.minimum_width and Window.minimum_height must be bigger than 0 for the size restriction to take effect.
[INFO   ] [ProbeSysfs  ] device match: /dev/input/event6
[INFO   ] [MTD         ] Read event from </dev/input/event6>
[INFO   ] [Base        ] Start application main loop

[WARNING] [MTD         ] Unable to open device "/dev/input/event6". Please ensure you have the appropriate permissions.

[ElliotG]

I'm not running Linux, but I saw this on the issues list: https://github.com/kivy/kivy/issues/9106  I don't know if this is related. 

The recommendation was to enable:  "Don't show window content while dragging them" in the window manager settings.

Perhaps a linux users has a better idea.  You could also ask on the kivy Discord. 

[IMRAAN MUHAMMED MUCTAR]

Hi guys. 

I am currently on my product release stage on Google play console.  My app actually contain ads and I added the ads very well and they work on my phone. And in my buildozer.spec file I have included every permission necessary. But everytime I upload the package I get this error message. I have added the permission like 25 times and complaining it everytime but to no avail. Please help

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