为什么xrandr --query包含一些xrandr --mode随后找不到的值？
$ xrandr --query
...
1440x810 60.00 59.97
$ xrandr --output HDMI-1 --mode 1440x810
xrandr: cannot find mode 1440x810
完整输出：
Screen 0: minimum 320 x 200, current 1600 x 900, maximum 16384 x 16384
HDMI-1 connected primary 1600x900+0+0 (normal left inverted right x axis y axis) 521mm x 293mm
1920x1080 60.00 + 59.96 50.00 59.94 59.93 30.00 25.00 24.00 29.97 23.98
1680x1050 59.95 59.88
1400x1050 74.76 59.98
1600x900 59.94 59.95 60.00* 59.82
1280x1024 75.02 60.02
1440x900 59.90
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1366x768 59.79
1280x800 59.99 59.97 59.81 59.91
1152x864 75.00
1280x720 60.00 59.99 59.86 60.00 50.00 59.94 59.74
1024x768 75.05 60.04 75.03 70.07 60.00
960x720 75.00 60.00
928x696 75.00 60.05
896x672 75.05 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
832x624 74.55
960x540 59.96 59.99 59.63 59.82
800x600 75.00 70.00 65.00 60.00 72.19 75.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
720x576 50.00
700x525 74.76 59.98
800x450 59.95 59.82
720x480 60.00 59.94
640x512 75.02 60.02
700x450 59.96 59.88
640x480 60.00 75.00 72.81 75.00 66.67 60.00 59.94
720x405 59.51 58.99
720x400 70.08
684x384 59.88 59.85
640x400 59.88 59.98
576x432 75.00
640x360 59.86 59.83 59.84 59.32
512x384 75.03 70.07 60.00
512x288 60.00 59.92
416x312 74.66
480x270 59.63 59.82
400x300 72.19 75.12 60.32 56.34
432x243 59.92 59.57
320x240 72.81 75.00 60.05
360x202 59.51 59.13
320x180 59.84 59.32
DVI-D-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)