操作系统：Linux Mint
的输出inxi -xG：
Graphics: Card: NVIDIA GF108 [GeForce GT 440] bus-ID: 02:00.0
X.Org: 1.13.0 drivers: vesa (unloaded: fbdev) Resolution:
800x600@0.0hz
GLX Renderer: Gallium 0.4 on llvmpipe (LLVM 3.3, 128 bits) GLX
Version: 2.1 Mesa 9.2.0 Direct Rendering: Yes
打算翻转电脑的屏幕。以上有关当前显卡和操作系统的信息。
$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 320 x 400, current 800 x 600, maximum 800 x 600
default connected 800x600+0+0 0mm x 0mm
800x600 0.0*
640x480 60.0
640x400 0.0 …