Linux修改屏幕分辨率至2K

1. 使用命令：cvt,与 xrandr
2. 使用cvt命令查看分辨率配置： Modeline后边分别是 modeName 以及 详细的配置

   linklee@linklee-270E5G-270E5U:~$ cvt
   # 2560x1440 59.96 Hz (CVT .69M9) hsync: 89.52 kHz; pclk: 312.25 MHz
   Modeline "2560x1440_60.00"  312.25           -hsync +vsync
   linklee@linklee-270E5G-270E5U:~$ 

3. xrandr查看当前显示模式明细

   linklee@linklee-270E5G-270E5U:~$ xrandr
   Screen : minimum  x , current  x , maximum  x
   LVDS-- connected 1366x768++ (normal left inverted right x axis y axis) 309mm x 174mm
      1366x768      60.00*+0x768      59.80    59.960x720      60.00    59.99    59.86    59.74
      1024x768      60.04    60.000x720       60.00
      928x696       60.05
      896x672       60.01
      1024x576      59.95    59.96    59.90    59.820x600       59.93    60.000x540       59.96    59.99    59.63    59.820x600       60.00    60.32    56.250x525       60.01    59.88
      864x486       59.92    59.570x512       60.170x525       59.980x450       59.95    59.820x512       60.020x450       59.890x450       59.96    59.880x480       60.00    59.940x405       59.51    58.99
      684x384       59.88    59.850x384       59.80    59.960x400       59.88    59.98
      576x432       60.060x360       59.86    59.83    59.84    59.32
      512x384       60.00
      512x288       60.00    59.920x270       59.63    59.820x300       60.32    56.34
      432x243       59.92    59.570x240       60.050x202       59.51    59.130x180       59.84    59.32
   VGA-- disconnected (normal left inverted right x axis y axis)
   HDMI-- connected primary 1920x1080++ (normal left inverted right x axis y axis) 597mm x 336mm
      1920x1080     60.00*   60.00    50.00    59.94    30.00    25.00    24.00    29.97    23.98
      1920x1080i    60.00    50.00    59.940x1050     59.880x900      60.000x1024     75.02    60.020x800      59.91
      1152x864      75.000x720      60.00    50.00    59.94
      1024x768      75.03    60.00
      832x624       74.550x600       75.00    60.320x576       50.000x480       60.00    59.94
      720x480i      60.00    59.940x480       75.00    60.00    59.940x400       70.08
   DP-- disconnected (normal left inverted right x axis y axis)
     2560x1440_60. (0x4fd) .250MHz -HSync +VSync
           h: width   start  end  total  skew     clock  .52KHz
           v: height  start  end  total            clock  .96Hz
   linklee@linklee-270E5G-270E5U:~$ 

4. 使用xrandr 创建新的显示模式

   linklee@linklee-270E5G-270E5U:~$ xrandr --newmode "2560x1440_60.00"  312.25           -hsync +vsync
   linklee@linklee-270E5G-270E5U:~$ 

5. 添加新的显示模式到制定端口，这里是 “HDMI-1-1”

   linklee@linklee-270E5G-270E5U:~$ xrandr --addmode HDMI--  "2560x1440_60.00"
   linklee@linklee-270E5G-270E5U:~$ 

6. 再次查看 显示配置项明细：

   linklee@linklee-270E5G-270E5U:~$ xrandr
   Screen : minimum  x , current  x , maximum  x
   LVDS-- connected 1366x768++ (normal left inverted right x axis y axis) 309mm x 174mm
      1366x768      60.00*+0x768      59.80    59.960x720      60.00    59.99    59.86    59.74
      1024x768      60.04    60.000x720       60.00
      928x696       60.05
      896x672       60.01
      1024x576      59.95    59.96    59.90    59.820x600       59.93    60.000x540       59.96    59.99    59.63    59.820x600       60.00    60.32    56.250x525       60.01    59.88
      864x486       59.92    59.570x512       60.170x525       59.980x450       59.95    59.820x512       60.020x450       59.890x450       59.96    59.880x480       60.00    59.940x405       59.51    58.99
      684x384       59.88    59.850x384       59.80    59.960x400       59.88    59.98
      576x432       60.060x360       59.86    59.83    59.84    59.32
      512x384       60.00
      512x288       60.00    59.920x270       59.63    59.820x300       60.32    56.34
      432x243       59.92    59.570x240       60.050x202       59.51    59.130x180       59.84    59.32
   VGA-- disconnected (normal left inverted right x axis y axis)
   HDMI-- connected primary 1920x1080++ (normal left inverted right x axis y axis) 597mm x 336mm
      1920x1080     60.00*   60.00    50.00    59.94    30.00    25.00    24.00    29.97    23.98
      1920x1080i    60.00    50.00    59.940x1050     59.880x900      60.000x1024     75.02    60.020x800      59.91
      1152x864      75.000x720      60.00    50.00    59.94
      1024x768      75.03    60.00
      832x624       74.550x600       75.00    60.320x576       50.000x480       60.00    59.94
      720x480i      60.00    59.940x480       75.00    60.00    59.940x400       70.08
      2560x1440_60.  59.96
   DP-- disconnected (normal left inverted right x axis y axis)
     2560x1440_60. (0x4fd) .250MHz -HSync +VSync
           h: width   start  end  total  skew     clock  .52KHz
           v: height  start  end  total            clock  .96Hz
   linklee@linklee-270E5G-270E5U:~$ 

7. 发现 HDMI-1-1中已经多了该选项，即可进入显示设置进行分辨率更改了。

注意：HDMI版本过低是支持不到2K分辨率的，所以即使出现了配置项也不行。所以设置前先确定你的显卡是否能够支持到这么高的分辨率，还有输出接口规范。