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 2560 1440 60
   # 2560x1440 59.96 Hz (CVT 3.69M9) hsync: 89.52 kHz; pclk: 312.25 MHz
   Modeline "2560x1440_60.00"  312.25  2560 2752 3024 3488  1440 1443 1448 1493 -hsync +vsync
   linklee@linklee-270E5G-270E5U:~$ 

3. xrandr查看当前显示模式明细

   linklee@linklee-270E5G-270E5U:~$ xrandr
   Screen 0: minimum 8 x 8, current 3286 x 1080, maximum 16384 x 16384
   LVDS-1-1 connected 1366x768+1920+0 (normal left inverted right x axis y axis) 309mm x 174mm
      1366x768      60.00*+
      1360x768      59.80    59.96  
      1280x720      60.00    59.99    59.86    59.74  
      1024x768      60.04    60.00  
      960x720       60.00  
      928x696       60.05  
      896x672       60.01  
      1024x576      59.95    59.96    59.90    59.82  
      960x600       59.93    60.00  
      960x540       59.96    59.99    59.63    59.82  
      800x600       60.00    60.32    56.25  
      840x525       60.01    59.88  
      864x486       59.92    59.57  
      800x512       60.17  
      700x525       59.98  
      800x450       59.95    59.82  
      640x512       60.02  
      720x450       59.89  
      700x450       59.96    59.88  
      640x480       60.00    59.94  
      720x405       59.51    58.99  
      684x384       59.88    59.85  
      680x384       59.80    59.96  
      640x400       59.88    59.98  
      576x432       60.06  
      640x360       59.86    59.83    59.84    59.32  
      512x384       60.00  
      512x288       60.00    59.92  
      480x270       59.63    59.82  
      400x300       60.32    56.34  
      432x243       59.92    59.57  
      320x240       60.05  
      360x202       59.51    59.13  
      320x180       59.84    59.32  
   VGA-1-1 disconnected (normal left inverted right x axis y axis)
   HDMI-1-1 connected primary 1920x1080+0+0 (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    59.94  
      1680x1050     59.88  
      1600x900      60.00  
      1280x1024     75.02    60.02  
      1280x800      59.91  
      1152x864      75.00  
      1280x720      60.00    50.00    59.94  
      1024x768      75.03    60.00  
      832x624       74.55  
      800x600       75.00    60.32  
      720x576       50.00  
      720x480       60.00    59.94  
      720x480i      60.00    59.94  
      640x480       75.00    60.00    59.94  
      720x400       70.08  
   DP-1-1 disconnected (normal left inverted right x axis y axis)
     2560x1440_60.00 (0x4fd) 312.250MHz -HSync +VSync
           h: width  2560 start 2752 end 3024 total 3488 skew    0 clock  89.52KHz
           v: height 1440 start 1443 end 1448 total 1493           clock  59.96Hz
   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  2560 2752 3024 3488  1440 1443 1448 1493 -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-1-1  "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 0: minimum 8 x 8, current 3286 x 1080, maximum 16384 x 16384
   LVDS-1-1 connected 1366x768+1920+0 (normal left inverted right x axis y axis) 309mm x 174mm
      1366x768      60.00*+
      1360x768      59.80    59.96  
      1280x720      60.00    59.99    59.86    59.74  
      1024x768      60.04    60.00  
      960x720       60.00  
      928x696       60.05  
      896x672       60.01  
      1024x576      59.95    59.96    59.90    59.82  
      960x600       59.93    60.00  
      960x540       59.96    59.99    59.63    59.82  
      800x600       60.00    60.32    56.25  
      840x525       60.01    59.88  
      864x486       59.92    59.57  
      800x512       60.17  
      700x525       59.98  
      800x450       59.95    59.82  
      640x512       60.02  
      720x450       59.89  
      700x450       59.96    59.88  
      640x480       60.00    59.94  
      720x405       59.51    58.99  
      684x384       59.88    59.85  
      680x384       59.80    59.96  
      640x400       59.88    59.98  
      576x432       60.06  
      640x360       59.86    59.83    59.84    59.32  
      512x384       60.00  
      512x288       60.00    59.92  
      480x270       59.63    59.82  
      400x300       60.32    56.34  
      432x243       59.92    59.57  
      320x240       60.05  
      360x202       59.51    59.13  
      320x180       59.84    59.32  
   VGA-1-1 disconnected (normal left inverted right x axis y axis)
   HDMI-1-1 connected primary 1920x1080+0+0 (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    59.94  
      1680x1050     59.88  
      1600x900      60.00  
      1280x1024     75.02    60.02  
      1280x800      59.91  
      1152x864      75.00  
      1280x720      60.00    50.00    59.94  
      1024x768      75.03    60.00  
      832x624       74.55  
      800x600       75.00    60.32  
      720x576       50.00  
      720x480       60.00    59.94  
      720x480i      60.00    59.94  
      640x480       75.00    60.00    59.94  
      720x400       70.08  
      2560x1440_60.00  59.96  
   DP-1-1 disconnected (normal left inverted right x axis y axis)
     2560x1440_60.00 (0x4fd) 312.250MHz -HSync +VSync
           h: width  2560 start 2752 end 3024 total 3488 skew    0 clock  89.52KHz
           v: height 1440 start 1443 end 1448 total 1493           clock  59.96Hz
   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。