Spyder Matplotlib RuntimeError：dvipng无法处理以下文件

Question

以下问题似乎只发生在Spyder IDE上，当我从命令行运行脚本时不会发生这种情况。

尝试使用Python 2.7.12中的pyplot进行简单绘图| Anaconda custom（64位）|：

import matplotlib.pyplot as plt
plt.plot(x,y)

我收到以下消息：

sh: 1: dvipng: not found
Traceback (most recent call last):
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/backends/backend_qt5agg.py", line 176, in __draw_idle_agg
    FigureCanvasAgg.draw(self)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/backends/backend_agg.py", line 474, in draw
    self.figure.draw(self.renderer)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/artist.py", line 61, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/figure.py", line 1159, in draw
    func(*args)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/artist.py", line 61, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/axes/_base.py", line 2324, in draw
    a.draw(renderer)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/artist.py", line 61, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/axis.py", line 1111, in draw
    tick.draw(renderer)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/artist.py", line 61, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/axis.py", line 252, in draw
    self.label1.draw(renderer)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/artist.py", line 61, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/text.py", line 792, in draw
    mtext=mtext)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/backends/backend_agg.py", line 253, in draw_tex
    Z = texmanager.get_grey(s, size, self.dpi)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/texmanager.py", line 583, in get_grey
    pngfile = self.make_png(tex, fontsize, dpi)
  File "/home/ohm/anaconda2/lib/python2.7/site-packages/matplotlib/texmanager.py", line 524, in make_png
    'dvipng: \n\n' % dvifile + report)
RuntimeError: dvipng was not able to process the following file:
/home/ohm/.cache/matplotlib/tex.cache/d0e4b65f3cbceaa40d39cd0b4aa94322.dvi
Here is the full report generated by dvipng: 

有人知道这里发生了什么吗？