是不是 kde 桌面支持不行？
```shell
$ screenfetch

██████████████████ ████████ chenkun@chenkun-pc
██████████████████ ████████ OS: Manjaro 21.2.6 Qonos
██████████████████ ████████ Kernel: x86_64 Linux 5.17.9-1-MANJARO
██████████████████ ████████ Uptime: 5h 25m
████████ ████████ Packages: 1607
████████ ████████ ████████ Shell: zsh 5.9
████████ ████████ ████████ Resolution: 3840x1080
████████ ████████ ████████ DE: KDE 5.94.0 / Plasma 5.24.5
████████ ████████ ████████ WM: KWin
████████ ████████ ████████ GTK Theme: Breath [GTK2/3]
████████ ████████ ████████ Icon Theme: WhiteSur
████████ ████████ ████████ Disk: 130G / 243G (57%)
████████ ████████ ████████ CPU: Intel Core i7-6700HQ @ 8x 3.5GHz [60.0°C]
████████ ████████ ████████ GPU: NVIDIA GeForce GTX 960M
RAM: 12062MiB / 15425MiB

```

@chenxytw 奇怪的很，另一个显示器完全黑屏，但是我能把软件托到外置那个显示屏，就是不显示

xrandr 输出
```shell
$ xrandr
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 16384 x 16384
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
1920x1080 60.05*+ 60.01 59.97 59.96 59.93
1680x1050 59.95 59.88
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.02
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1280x800 59.99 59.97 59.81 59.91
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
700x525 59.98
800x450 59.95 59.82
640x512 60.02
700x450 59.96 59.88
640x480 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
640x400 59.88 59.98
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
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 527mm x 296mm
1920x1080 60.00*+ 50.00 59.94
1920x1080i 60.00 50.00 59.94
1680x1050 59.88
1280x1024 75.02 60.02
1440x900 59.90
1280x960 60.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-3 disconnected (normal left inverted right x axis y axis)

```

@ClericPy
试了一下没有用呢。。。

@Biwood 应该不是线的问题吧，显示器能识别出来，用 xrandr 能看到两个显示器，但外置的 hdmi 那个显示器不显示

哈哈 懒得学啊，还有公司都用 java,自己学了也没用