参考
xrandr
列出屏幕支持分辨率
# xrandr -q Screen 0: minimum 320 x 200, current 1280 x 800, maximum 1280 x 1280 VGA disconnected (normal left inverted right x axis y axis) LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis) 304mm x 190mm 1280x800 60.0*+ 1024x768 60.0 800x600 60.3 640x480 59.9 TV disconnected (normal left inverted right x axis y axis)
设置屏幕分辨率
根据上面查到的分辨率，我们可以手动设置，下面将分辨率设置为 1024x768 ， 刷新率为60Hz。
# xrandr -s 1024x768 -r 60
查看所有显示器属性
# xrandr --prop
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 1280 x 1280
VGA disconnected (normal left inverted right x axis y axis)
LVDS connected 1024x768+0+0 (normal left inverted right x axis y axis) 304mm x 190mm
EDID_DATA:
00ffffffffffff00320c290100000000
00110103801e13780ab3859558538a28
25505400000001010101010101010101
010101010101121b007d502016303020
360030be100000180000000000000000
00000000000000000000000000fe004c
475068696c6970734c43440a000000fe
004c503134315758332d544c4e3100b2
PANEL_FITTING: full_aspect
supported: center full_aspect full
BACKLIGHT_CONTROL: combination
supported: native legacy combination kernel
BACKLIGHT: 14203 (0x0000377b) range: (0,14203)
1280x800 60.0 +
1024x768 60.0*
800x600 60.3
640x480 59.9
TV disconnected (normal left inverted right x axis y axis)
HUE: 0 (0x00000000) range: (0,255)
SATURATION: 96 (0x00000060) range: (0,255)
CONTRAST: 96 (0x00000060) range: (0,255)
BRIGHTNESS: 128 (0x00000080) range: (0,255)
BOTTOM: 37 (0x00000025) range: (0,100)
RIGHT: 46 (0x0000002e) range: (0,100)
TOP: 36 (0x00000024) range: (0,100)
LEFT: 54 (0x00000036) range: (0,100)
TV_FORMAT: NTSC-M
supported: NTSC-M NTSC-443 NTSC-J PAL-M
PAL-N PAL
设置双屏(dual monitor)显示
如果你设置有一个LED（笔记本显示器），再外界一个 VGA 显示器，用 ”xrandr —prop“ 命令就会得到类似 LVDS1 和 VGA1 列表。我们可以设置这两个双屏显示。
xrandr --output LVDS1 --mode 1280x800 --output VGA1 --mode 1024x768 --above LVDS1
