Ubuntu几秒钟没有任何操作自动黑屏

在鼠标或键盘30秒内没有做任何操作以后，显示器自动黑屏。
重新点击鼠标或键盘，屏幕唤醒。
设置中心各种设置方式都已经尝试过。无效。

$xset -q // 执行该命令

Keyboard Control:
  auto repeat:  on    key click percent:      LED mask:
  XKB indicators:
    : Caps Lock:   off    : Num Lock:    on     : Scroll Lock: off
    : Compose:     off    : Kana:        off    : Sleep:       off
    : Suspend:     off    : Mute:        off    : Misc:        off
    : Mail:        off    : Charging:    off    : Shift Lock:  off
    : Group :     off    : Mouse Keys:  off
  auto repeat delay:      repeat rate:
  auto repeating keys:  00ffffffdffffbbf
                        fadfffefffedffff
                        9fffffffffffffff
                        fff7ffffffffffff
  bell percent:      bell pitch:      bell duration:
Pointer Control:
  acceleration:  /    threshold:
Screen Saver:
  prefer blanking:  yes    allow exposures:  yes
  timeout:      cycle:
Colors:
  default colormap:  0x47    BlackPixel:  0x0    WhitePixel:  0xffffff
Font Path:
  /usr/share/fonts/X11/misc,/usr/share/fonts/X11/Type1,built-ins
DPMS (Energy Star):
  Standby:     Suspend:     Off:
  DPMS is Enabled
  Monitor is On

可以看出是DPMS问题,可以用

sudo xset -dpms

来关闭DPMS