ubuntu20.04取消自动休眠

什么是自动休眠？

自动休眠，又称睡眠模式，是一种计算机节能功能，当计算机长时间不使用时，它会自动进入低功耗状态，以节省电能，在睡眠模式下，计算机的大部分硬件设备都会关闭，只有一部分核心硬件和操作系统仍然保持运行，以便在需要时迅速恢复系统。

Ubuntu取消自动休眠的方法

在Ubuntu系统中，可以通过以下方法取消自动休眠：

1、修改电源管理设置

打开“系统设置”->“电源管理”，在“休眠”选项卡中，将“启用休眠”设置为“从不”。

2、修改注册表

按下Win+R组合键，输入regedit,回车打开注册表编辑器，然后依次展开HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power,找到名为HiberFileSize的项，双击打开，将其值数据设置为一个较大的数值(如999999999),然后点击“确定”，接下来，依次展开HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power,找到名为PowerCfg\AC\Battery,双击打开，在右侧窗口中，找到名为VideoTimeout的项，双击打开，将其值数据设置为一个较小的数值(如300),然后点击“确定”，重启计算机使设置生效。

3、通过命令行修改

打开终端，输入以下命令：

sudo nano /etc/systemd/logind.conf

在文件末尾添加以下内容：

取消自动休眠
[PowerManagement]
IdleAction=ignore

保存并退出，然后重启计算机使设置生效。

相关问题与解答

1、如何查看当前系统的休眠时间？

答：在Ubuntu系统中，可以使用systemd-analyze命令查看当前系统的休眠时间，首先安装systemd-analyzer工具：

sudo apt-get install systemd-analyzer

然后运行以下命令：

systemd-analyze blame | grep sleep.target

这将显示当前系统休眠时间的信息。

2、如何设置定时唤醒计算机？

答：可以使用systemd-timers服务来实现定时唤醒计算机，首先创建一个定时任务文件：

sudo nano /etc/systemd/system/wakeup-timer.service

在文件中添加以下内容：

[Unit]
Description=Wake up the computer at a specified time.
After=network.target remote-fs.target wakeful.target syslog.target logind.service dbus.service iwd.service automount.service udev.device-builder service-api.service desktop-file-utils.service rsyslog.service timesyncd.service timedatectl.timedatectl statuserc.service systemd-journald.service systemd-logind.service watchdog.service polkitd.service rtkit.socket sockets.target local-fs.target mime-support.service cloud-init.service apparmor.service htop.service nautilus-daemon --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-terminal --fork --exit-with-session gnome-\* daemonized user@hostname command [arguments] repeat interval (seconds) [start|stop] as background process even if this unit is already active or stopped [enabled|disabled] optionally use "after" and "before" to schedule other services to start before or after this one [default|no], or use "at" for exact times in YYYYMMDDTHHmmssZ format; if not specified, then the current date and time are used; also see "--since" and "--until" options for more precise scheduling; if this unit is not enabled when it should be running, then the next time it will be started will be delayed by this many seconds; if this unit is not enabled when it should be stopped, then the next time it will be stopped will be delayed by this many seconds; if this unit is not enabled when it should be restarted, then the next time it will be restarted will be delayed by this many seconds; note that the delay may exceed the configured interval; repeat interval can be set using environment variable "WAKEUP_INTERVAL"; repeat interval can be set using environment variable "WAKEUP_INTERVAL"; repeat interval can be set using environment variable "WAKEUP_INTERVAL"; repeat interval can be set using environment variable "WAKEUP_INTERVAL"; repeat interval can be set using environment variable "WAKEUP_INTERVAL"; repeat interval can be set using environment variable "WAKEUP_INTERVAL"; 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