这是 17.10 中的一个问题，并且延续到了 18.04，现在它让我抓狂不已。
我的屏幕闲置一分钟后就会变黑。我甚至无法阅读文章。
在 Gnome 设置中，Privacy > Lock screen已关闭，我已设置Power > Blank Screen为，Never并Automatic Suspend设置为Off
我还需要禁用什么？我会决定何时锁定屏幕。我只想关闭所有功能。
更新
我还检查并排除了其他事项：
我已经安装了 Dconf Editor 并检查了那里的设置，但我找不到任何可以改变行为的东西。我尝试禁用idle-dim下面的设置/org/gnome/settings-daemon/plugins/power，并尝试禁用整个电源插件，这两种改变都没有对行为产生影响。
我还仔细检查了nvidia-settings应用程序，没有发现任何与电源或屏幕消隐相关的内容。我的 xorg 服务器使用开箱即用的自动检测进行启动，并且我的系统上没有任何 xorg.conf 设置。对我来说，这只是 18.04 的默认行为。
找到了这个问题并检查xset q输出，添加它。您会注意到我的timeout和cycle设置位于0那里，这是解决方案，但我的已经设置为 0，我的屏幕仍然空白。无论如何，这个问题是针对 Unity 的，而我的问题针对 Gnome3
routhinator@chris-desktop:~$ xset q
Keyboard Control:
auto repeat: on key click percent: 0 LED mask: 00000002
XKB indicators:
00: Caps Lock: off 01: Num Lock: on 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: 2/1 threshold: 4
Screen Saver:
prefer blanking: yes allow exposures: yes
timeout: 0 cycle: 0
Colors:
default colormap: 0x20 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
更新 2
按照@WinEunuuchs2Unix 我已经检查、更改并重新检查了这个问题而且问题仍然存在。
另一方面，这些需要手动更改的设置似乎是一个长期存在的错误，Ubuntu 早就应该修复了，因为这些正是我以为我在电源设置中关闭的设置。
routhinator@chris-desktop:~$ gsettings get org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout
1800
routhinator@chris-desktop:~$ gsettings get org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout
3600
routhinator@chris-desktop:~$ gsettings get org.gnome.desktop.screensaver idle-activation-enabled
true
routhinator@chris-desktop:~$ gsettings get org.gnome.settings-daemon.plugins.power idle-dim
true
routhinator@chris-desktop:~$ gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout 0
routhinator@chris-desktop:~$ gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout 0
routhinator@chris-desktop:~$ gsettings set org.gnome.desktop.screensaver idle-activation-enabled false
routhinator@chris-desktop:~$ gsettings set org.gnome.settings-daemon.plugins.power idle-dim false
routhinator@chris-desktop:~$ gsettings get org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout
0
routhinator@chris-desktop:~$ gsettings get org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout
0
routhinator@chris-desktop:~$ gsettings get org.gnome.desktop.screensaver idle-activation-enabled
false
routhinator@chris-desktop:~$ gsettings get org.gnome.settings-daemon.plugins.power idle-dim
false
更新 3
根据要求的 lspci 输出：
routhinator@chris-desktop:~$ lspci
00:00.0 Host bridge: Intel Corporation 5520/5500/X58 I/O Hub to ESI Port (rev 13)
00:01.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 1 (rev 13)
00:02.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 2 (rev 13)
00:03.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 3 (rev 13)
00:07.0 PCI bridge: Intel Corporation 5520/5500/X58 I/O Hub PCI Express Root Port 7 (rev 13)
00:14.0 PIC: Intel Corporation 7500/5520/5500/X58 I/O Hub System Management Registers (rev 13)
00:14.1 PIC: Intel Corporation 7500/5520/5500/X58 I/O Hub GPIO and Scratch Pad Registers (rev 13)
00:14.2 PIC: Intel Corporation 7500/5520/5500/X58 I/O Hub Control Status and RAS Registers (rev 13)
00:14.3 PIC: Intel Corporation 7500/5520/5500/X58 I/O Hub Throttle Registers (rev 13)
00:19.0 Ethernet controller: Intel Corporation 82567V-2 Gigabit Network Connection
00:1a.0 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #4
00:1a.1 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #5
00:1a.2 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #6
00:1a.7 USB controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI Controller #2
00:1b.0 Audio device: Intel Corporation 82801JI (ICH10 Family) HD Audio Controller
00:1c.0 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Root Port 1
00:1c.4 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Root Port 5
00:1d.0 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #1
00:1d.1 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #2
00:1d.2 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #3
00:1d.7 USB controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI Controller #1
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 90)
00:1f.0 ISA bridge: Intel Corporation 82801JIR (ICH10R) LPC Interface Controller
00:1f.2 IDE interface: Intel Corporation 82801JI (ICH10 Family) 4 port SATA IDE Controller #1
00:1f.3 SMBus: Intel Corporation 82801JI (ICH10 Family) SMBus Controller
00:1f.5 IDE interface: Intel Corporation 82801JI (ICH10 Family) 2 port SATA IDE Controller #2
01:00.0 IDE interface: Marvell Technology Group Ltd. Device 91a3 (rev 11)
02:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 03)
03:00.0 VGA compatible controller: NVIDIA Corporation GK106 [GeForce GTX 660] (rev a1)
03:00.1 Audio device: NVIDIA Corporation GK106 HDMI Audio Controller (rev a1)
04:00.0 VGA compatible controller: NVIDIA Corporation GK107 [GeForce GTX 650] (rev a1)
04:00.1 Audio device: NVIDIA Corporation GK107 HDMI Audio Controller (rev a1)
05:00.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6315 Series Firewire Controller (rev 01)
ff:00.0 Host bridge: Intel Corporation Xeon 5500/Core i7 QuickPath Architecture Generic Non-Core Registers (rev 05)
ff:00.1 Host bridge: Intel Corporation Xeon 5500/Core i7 QuickPath Architecture System Address Decoder (rev 05)
ff:02.0 Host bridge: Intel Corporation Xeon 5500/Core i7 QPI Link 0 (rev 05)
ff:02.1 Host bridge: Intel Corporation Xeon 5500/Core i7 QPI Physical 0 (rev 05)
ff:03.0 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller (rev 05)
ff:03.1 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Target Address Decoder (rev 05)
ff:03.4 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Test Registers (rev 05)
ff:04.0 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Channel 0 Control Registers (rev 05)
ff:04.1 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Channel 0 Address Registers (rev 05)
ff:04.2 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Channel 0 Rank Registers (rev 05)
ff:04.3 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Channel 0 Thermal Control Registers (rev 05)
ff:05.0 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Channel 1 Control Registers (rev 05)
ff:05.1 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Channel 1 Address Registers (rev 05)
ff:05.2 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Channel 1 Rank Registers (rev 05)
ff:05.3 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Channel 1 Thermal Control Registers (rev 05)
ff:06.0 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Channel 2 Control Registers (rev 05)
ff:06.1 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Channel 2 Address Registers (rev 05)
ff:06.2 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Channel 2 Rank Registers (rev 05)
ff:06.3 Host bridge: Intel Corporation Xeon 5500/Core i7 Integrated Memory Controller Channel 2 Thermal Control Registers (rev 05)
答案1
我在一台安装了 Ubuntu 18.04 Desktop 但实际上用作服务器的机器上也遇到了这种情况。因此屏幕变黑了，无法恢复。最后，我发现这实际上是由睡眠设置引起的。
由于该机器使用 LXDE，根本没有安装 Gnome，因此我发现的所有提及 gsettings 等的建议都无法使用。最终我被引导到睡眠设置，与正在使用的登录/窗口管理器无关。
因此，除了之前文章中列出的 gsettings 解决方案之外，还可以通过禁用睡眠服务来测试此解决方案，看看是否能解决问题：
sudo systemctl mask sleep.target
要撤消更改：
sudo systemctl unmask sleep.target
为了防止任何不必要的行为，我还禁用了 suspend.target、hibernate.target 和 hybrid-sleep.target。
答案2
我也遇到了类似的问题，直到我安装了可通过软件应用程序使用的名为“caffeine”的 gnome 扩展。
答案3
这个问答似乎描述了你的情况：即使电源设置已禁用，屏幕在空闲时也会关闭
总结一下答案，首先发现您的选择：
gsettings get org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout
gsettings get org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout
gsettings get org.gnome.desktop.screensaver idle-activation-enabled
gsettings get org.gnome.settings-daemon.plugins.power idle-dim
然后用以下方式设置它们：
gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout 0
gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout 0
gsettings set org.gnome.desktop.screensaver idle-activation-enabled false
gsettings set org.gnome.settings-daemon.plugins.power idle-dim false