我正在尝试添加自定义分辨率来显示，但是却无法添加。
到目前为止我已经尝试过：
1-首先看看我目前的决心
$ xrandr
输出 ：
Screen 0: minimum 8 x 8, current 1024 x 768, maximum 4096 x 4096
DVI-I-0 disconnected (normal left inverted right x axis y axis)
VGA-0 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1024x768 60.0*+
1360x768 60.0 59.8
1152x864 60.0
800x600 72.2 60.3 56.2
680x384 60.0 59.8
640x480 59.9
576x432 60.1
512x384 60.0
400x300 72.2 60.3 56.3
320x240 60.1
TV-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 disconnected (normal left inverted right x axis y axis)
2-尝试使用 cvt (1280x768) 生成“模式行”
$ cvt 1280 768 60
输出：
# 1280x768 59.87 Hz (CVT) hsync: 47.78 kHz; pclk: 79.50 MHz
Modeline "1280x768_60.00" 79.50 1280 1344 1472 1664 768 771 781 798 -hsync +vsync
3-现在告诉 xrandr：
$ sudo xrandr --newmode "1280x768_60.00" 79.50 1280 1344 1472 1664 768 771 781 798 -hsync +vsync
4-最后 ：
$ sudo xrandr --addmode VGA-0 "1280x768_60.00"
输出 ：
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 18 (RRAddOutputMode)
Serial number of failed request: 29
Current serial number in output stream: 30
完成上述所有步骤后，再次：
$ xrandr
输出 ：
Screen 0: minimum 8 x 8, current 1024 x 768, maximum 4096 x 4096
DVI-I-0 disconnected (normal left inverted right x axis y axis)
VGA-0 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1024x768 60.0*+
1360x768 60.0 59.8
1152x864 60.0
800x600 72.2 60.3 56.2
680x384 60.0 59.8
640x480 59.9
576x432 60.1
512x384 60.0
400x300 72.2 60.3 56.3
320x240 60.1
TV-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 disconnected (normal left inverted right x axis y axis)
1280x768_60.00 (0x27b) 79.5MHz
h: width 1280 start 1344 end 1472 total 1664 skew 0 clock 47.8KHz
v: height 768 start 771 end 781 total 798 clock 59.9Hz
如您所见，我的自定义分辨率（1280x768）未添加！
任何帮助都将非常有帮助。