问题
安装了Ubuntu后分辨率和显示器不匹配
xrandr Failed to get size of gamma for output default
xorg.conf
sudo vim /etc/xorg.conf
复制以下内容：
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
HorizSync 28.0 - 70.0
VertRefresh 56.0 - 75.0
EndSection
Section "Device"
Identifier "VMware SVGA"
Driver "vesa"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1920x1080_60.00"
EndSubSection
EndSection
:wq!（保存
重新启动就成功了。