我完全不知所措。在新安装的Ubuntu 16.04 LTS 64位版本上，我的笔记本屏幕每隔15秒就会变黑。如果我移动鼠标或点击，则显示会恢复（无需登录）。由于每隔15秒就会发生这种情况，笔记本基本上无法使用。它看起来像是屏幕保护程序的行为，但也可能是其他原因。
如果我输入sudo lshw -C video | grep product:，我得到的结果是-
product: Broadwell-U Integrated Graphics
product: GM108M [GeForce 940M]
如果我输入
sudo lshw -C video，我会得到- *-display
description: VGA compatible controller
product: Broadwell-U Integrated Graphics
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:44 memory:f0000000-f0ffffff memory:e0000000-efffffff ioport:4000(size=64)
*-display UNCLAIMED
description: 3D controller
product: GM108M [GeForce 940M]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:08:00.0
version: a2
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress cap_list
configuration: latency=0
resources: memory:f1000000-f1ffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:3000(size=128)
如果我输入
xset s off，似乎没有任何效果。如果我输入
gnome screensaver，我得到的是 -** (gnome-screensaver:5014): WARNING **: screensaver already running in this session
如果我输入
xscreensaver，我会得到-The program 'xscreensaver' is currently not installed. You can install it by typing: sudo apt install xscreensaver
如果我输入
xset -q，我会得到-Keyboard Control:
auto repeat: on key click percent: 0 LED mask: 00000000
XKB indicators:
00: Caps Lock: off 01: Num Lock: off 02: Scroll Lock: off
03: Compose: off 04: Kana: off 05: Sleep: off
06: Suspend: off 07: Mute: off 08: Misc: off
09: Mail: off 10: Charging: off 11: Shift Lock: off
12: Group 2: off 13: Mouse Keys: off
auto repeat delay: 500 repeat rate: 33
auto repeating keys: 00ffffffdffffbbf
fadfffefffedffff
9fffffffffffffff
fff7ffffffffffff
bell percent: 50 bell pitch: 400 bell duration: 100
Pointer Control:
acceleration: 5/1 threshold: 5
Screen Saver:
prefer blanking: yes allow exposures: yes
timeout: 0 cycle: 0
Colors:
default colormap: 0x22 BlackPixel: 0x0 WhitePixel: 0xffffff
Font Path:
/usr/share/fonts/X11/misc,/usr/share/fonts/X11/Type1,built-ins
DPMS (Energy Star):
Standby: 0 Suspend: 0 Off: 0
DPMS is Enabled
Monitor is On
不用说，如果我去“设置”>“系统设置”......并对“亮度和锁定”，“电源”或“屏幕显示”进行更改，这对问题没有影响。我不知道该怎么办。如有帮助，将不胜感激。