我有一台旧电脑（大约7年），它有一个旧的显卡，所以我不能正常运行kivy，我必须使用一个虚拟环境。这是可以的，但我试图使用kivy中的matplotlib，然后它不会运行。它说[INFO ] [GL ] Backend used <glew>，即使我指定os.environ['KIVY_GL_BACKEND'] = 'angle_sdl2'
正如我所说，我尝试了os.environ['KIVY_GL_BACKEND'] = 'angle_sdl2'，但没有成功。
这是全部代码

import kivy
from kivy.garden.matplotlib.backend_kivyagg import FigureCanvasKivyAgg
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
import matplotlib.pyplot as plt

from kivy import Config
Config.set('graphics', 'multisamples', '0')

import os
os.environ['KIVY_GL_BACKEND'] = 'angle_sdl2'

plt.plot([1, 23, 2, 4])
plt.ylabel('some numbers')

class MyApp(App):

    def build(self):
        box = BoxLayout()
        box.add_widget(FigureCanvasKivyAgg(plt.gcf()))
        return box

MyApp().run()

我有这个

[INFO   ] [Logger      ] Record log in C:\Users\werto\.kivy\logs\kivy_19-05-14_11.txt
[INFO   ] [Kivy        ] v1.10.1
[INFO   ] [Python      ] v3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:59:51) [MSC v.1914 64 bit (AMD64)]
[INFO   ] [Factory     ] 194 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: sdl2
[INFO   ] [GL          ] Using the "OpenGL" graphics system
[INFO   ] [GL          ] GLEW initialization succeeded
[INFO   ] [GL          ] No framebuffers extension is supported
[INFO   ] [GL          ] Backend used <glew>
[INFO   ] [GL          ] OpenGL version <b'1.1.0'>
[INFO   ] [GL          ] OpenGL vendor <b'Microsoft Corporation'>
[INFO   ] [GL          ] OpenGL renderer <b'GDI Generic'>
[INFO   ] [GL          ] OpenGL parsed version: 1, 1
[CRITICAL] [GL          ] Minimum required OpenGL version (2.0) NOT found!

OpenGL version detected: 1.1

Version: b'1.1.0'
Vendor: b'Microsoft Corporation'
Renderer: b'GDI Generic'

Try upgrading your graphics drivers and/or your graphics hardware in case of problems.

The application will leave now.