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Linux：如何在睡眠一段时间后进入休眠状态

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Linux：如何在睡眠一段时间后进入休眠状态

我怀念 Linux 的 Windows 功能之一如下：在 Windows 中，您合上笔记本电脑盖，系统将挂起到 RAM，一段时间后（可配置），计算机将自动唤醒并继续挂起到磁盘。我知道 Linux 中存在 suspend2both 模式，但该模式在电池耗尽之前挂起到磁盘，而这正是我想要避免的。

编辑：使用答案数据搜索后找到更详细的答案

https://askubuntu.com/questions/12383/how-to-go-automatically-from-suspend-into-hibernate

EDIT2：这些是我在 MSI Wind U100 上使用 Ubuntu 11.04 所遵循的步骤。

首先：我安装了 tuxonice，因为我的上网本无法使用休眠功能。但副作用是休眠和唤醒过程非常快而且非常稳定。唯一的缺点是休眠/恢复时的显示为文本模式。安装 tuxonice 最简单的方法是添加相应的 ppa：https://launchpad.net/~tuxonice/+archive/ppa

一旦休眠工作，这个脚本就会发挥所有魔力

#!/bin/bash
# Script name: /etc/pm/sleep.d/00rtchibernate
# Purpose: Auto hibernates after a period of sleep
# Edit the "autohibernate" variable below to set the number of seconds to sleep.
curtime=$(date +%s)
autohibernate=7200
echo "$curtime $1" >>/tmp/autohibernate.log
if [ "$1" = "suspend" ]
then
    # Suspending.  Record current time, and set a wake up timer.
    echo "$curtime" >/var/run/pm-utils/locks/rtchibernate.lock
    rtcwake -m no -s $autohibernate
fi

if [ "$1" = "resume" ]
then
    # Coming out of sleep
    sustime=$(cat /var/run/pm-utils/locks/rtchibernate.lock)
    rm /var/run/pm-utils/locks/rtchibernate.lock
    # Did we wake up due to the rtc timer above?
    if [ $(($curtime - $sustime)) -ge $autohibernate ]
    then
        # Then hibernate
        rm /var/run/pm-utils/locks/pm-suspend.lock
        /usr/sbin/pm-hibernate
    else
        # Otherwise cancel the rtc timer and wake up normally.
        rtcwake -m no -s 1
    fi
fi

通过修改自动休眠值，您可以更改机器唤醒并立即进入休眠状态的睡眠时间

注意：您可能必须安装 rtcwake，我已经安装了，但我不记得我是否自己安装了该软件包。

答案1

对于使用 的其他发行版，例如 CentOS、Fedor 或 Redhat systemd。我们需要更改脚本的位置，而不是将其放在/etc/pm/sleep.d/使用的位置，/usr/lib/systemd/system-sleep/以使其可执行。0000rtchibernate.shchmod +x

最后，脚本中还需要进行一些调整，以使其与兼容systemd。为了简单起见，我给出了完整的重写脚本

#!/bin/bash
# Script name: /usr/lib/systemd/system-sleep/0000rtchibernate
# Purpose: Auto hibernates after a period of sleep
# Edit the "autohibernate" variable below to set the number of seconds to sleep.
curtime=$(date +%s)
autohibernate=3600 #number is second
lock=/tmp/rtchibernate.lock
echo "$curtime $1" >>/tmp/autohibernate.log
if [ "$1" = "pre" ]
then
    # Suspending.  Record current time, and set a wake up timer.
    echo "$curtime" > $lock
    rtcwake -m no -s $autohibernate
fi

if [ "$1" = "post" ]
then
    # Coming out of sleep
    sustime=`cat $lock`
    rm $lock
    # Did we wake up due to the rtc timer above?
    if [ $(($curtime - $sustime)) -ge $autohibernate ]
    then
        # Then hibernate
        systemctl hibernate
    else
        # Otherwise cancel the rtc timer and wake up normally.
        rtcwake -m no -s 1
    fi
fi

该autohibernate变量以秒为单位进行更改，以使其看起来合适。我希望我有所帮助

答案2

我猜你想要的是http://www.linuxcertif.com/man/8/rtcwake/它可以代替默认的 S2R（又称睡眠）程序。如果机器已经睡眠超过 20 分钟（比如说），这可以唤醒机器并触发休眠。

答案3

不要忘记chmod +x该文件，使其可执行。

还有另一种不使用 的解决方案rtcwake，wakealarm在 中使用/sys/class/rtc/rtc0。在注释 #since the kernel does not directly support ... 之后，在 pm-functions ( ) 中使用过时的代码/usr/lib/pm-utils（因为当前内核（3.6 之后的版本）直接支持）。恢复该代码并将 替换为do_suspend()part do_suspend_hybrid()。

过时的代码（当调用 suspend_hybrid 时暂停然后休眠）：

# since the kernel does not directly support hybrid sleep, we do
# something else -- suspend and schedule an alarm to go into
# hibernate if we have slept long enough.
# Only do this if we do not need to do any special video hackery on resume
# from hibernate, though.
if [ -z "$SUSPEND_HYBRID_MODULE" -a -w "$PM_RTC/wakealarm" ] && \
    check_suspend && check_hibernate && ! is_set $HIBERNATE_RESUME_POST_VIDEO; \
    then
    SUSPEND_HYBRID_MODULE="kernel"
    do_suspend_hybrid() {
    WAKETIME=$(( $(cat "$PM_RTC/since_epoch") + PM_HIBERNATE_DELAY))
    echo >"$PM_RTC/wakealarm"
    echo $WAKETIME > "$PM_RTC/wakealarm"
    if do_suspend; then
        NOW=$(cat "$PM_RTC/since_epoch")
        if [ "$NOW" -ge "$WAKETIME" -a "$NOW" -lt $((WAKETIME + 30)) ]; then
        log "Woken by RTC alarm, hibernating."
        # if hibernate fails for any reason, go back to suspend.
        do_hibernate || do_suspend
        else
        echo > "$PM_RTC/wakealarm"
        fi
    else
        # if we cannot suspend, just try to hibernate.
        do_hibernate
    fi
    }
fi

推荐。更易于使用，uswsusp同时最大化s2bothie的优势s2both when suspend。将恢复的代码放在模块do_suspend()的一部分（ ）。uswsusp/usr/lib/pm-utils/module.d

恢复的代码（当调用suspend时suspend_hybrid）：

WAKETIME=$(( $(cat "$PM_RTC/since_epoch") + PM_HIBERNATE_DELAY))
echo >"$PM_RTC/wakealarm"
echo $WAKETIME > "$PM_RTC/wakealarm"
if do_suspend_hybrid; then
    NOW=$(cat "$PM_RTC/since_epoch")
    if [ "$NOW" -ge "$WAKETIME" -a "$NOW" -lt $((WAKETIME + 30)) ];             then
    log "Woken by RTC alarm, hibernating."
    # if hibernate fails for any reason, go back to suspend_hybrid.
    do_hibernate || do_suspend_hybrid
    else
    echo > "$PM_RTC/wakealarm"
    fi
else
    # when do_suspend is being called, convert to suspend_hybrid.
    do_suspend_hybrid
fi

使用uswsusp，我们可以看到挂起/休眠的进度以及文本中显示的逆向过程，甚至可以通过按退格键中止它。如果没有uswsusp，挂起/休眠只会令人烦恼地出现和消失，尤其是在wakealarm触发和执行时hibernate（s2disk在 uswsusp 中）。在文件的通常位置设置休眠前的睡眠时间pm-functions。

# variables to handle hibernate after suspend support
PM_HIBERNATE_DELAY=900  # 15 minutes
PM_RTC=/sys/class/rtc/rtc0

这是uswsuspmod:（记住，这个模块是从这里调用的，pm-functions所以插入的变量是相同的）

#!/bin/sh

# disable processing of 90chvt and 99video.
# s2ram and s2disk handle all this stuff internally.
uswsusp_hooks()
{
    disablehook 99video "disabled by uswsusp"
}

# Since we disabled 99video, we need to take responsibility for proper
# quirk handling.  s2ram handles all common video quirks internally,
# so all we have to do is translate the HAL standard options to s2ram options.
uswsusp_get_quirks()
{
    OPTS=""
    ACPI_SLEEP=0
    for opt in $PM_CMDLINE; do
        case "${opt##--quirk-}" in # just quirks, please
            dpms-on)       ;; # no-op
            dpms-suspend)      ;; # no-op
            radeon-off)        OPTS="$OPTS --radeontool" ;;
            reset-brightness)  ;; # no-op
            s3-bios)       ACPI_SLEEP=$(($ACPI_SLEEP + 1)) ;;
            s3-mode)       ACPI_SLEEP=$(($ACPI_SLEEP + 2)) ;;
            vbe-post)      OPTS="$OPTS --vbe_post" ;;
            vbemode-restore)   OPTS="$OPTS --vbe_mode" ;;
            vbestate-restore)  OPTS="$OPTS --vbe_save" ;;
            vga-mode-3)        ;; # no-op
            save-pci)          OPTS="$OPTS --pci_save" ;;
            none)          QUIRK_NONE="true" ;;
            *) continue ;;
        esac
    done
    [ $ACPI_SLEEP -ne 0 ] && OPTS="$OPTS --acpi_sleep $ACPI_SLEEP"
    # if we were told to ignore quirks, do so.
    # This is arguably not the best way to do things, but...
    [ "$QUIRK_NONE" = "true" ] && OPTS=""
}

# Since we disabled 99video, we also need to handle displaying
# help info for the quirks we handle.
uswsusp_help()
{
    echo  # first echo makes it look nicer.
    echo "s2ram video quirk handler options:"
    echo
    echo "  --quirk-radeon-off"
    echo "  --quirk-s3-bios"
    echo "  --quirk-s3-mode"
    echo "  --quirk-vbe-post"
    echo "  --quirk-vbemode-restore"
    echo "  --quirk-vbestate-restore"
    echo "  --quirk-save-pci"
    echo "  --quirk-none"
}

# This idiom is used for all sleep methods.  Only declare the actual
# do_ method if:
# 1: some other sleep module has not already done so, and
# 2: this sleep method can actually work on this system.
#
# For suspend, if SUSPEND_MODULE is set then something else has already
# implemented do_suspend.  We could just check to see of do_suspend was
# already declared using command_exists, but using a dedicated environment
# variable makes it easier to debug when we have to know what sleep module
# ended up claiming ownership of a given sleep method.
if [ -z "$SUSPEND_MODULE" ] && command_exists s2ram && \
    ( grep -q mem /sys/power/state || \
        ( [ -c /dev/pmu ] && check_suspend_pmu; ); ); then
    SUSPEND_MODULE="uswsusp"
    do_suspend()
    {
        WAKETIME=$(( $(cat "$PM_RTC/since_epoch") + PM_HIBERNATE_DELAY))
        echo >"$PM_RTC/wakealarm"
        echo $WAKETIME > "$PM_RTC/wakealarm"
        if do_suspend_hybrid; then
            NOW=$(cat "$PM_RTC/since_epoch")
            if [ "$NOW" -ge "$WAKETIME" -a "$NOW" -lt $((WAKETIME + 30)) ]; then
            log "Woken by RTC alarm, hibernating."
            # if hibernate fails for any reason, go back to suspend_hybrid.
            do_hibernate || do_suspend_hybrid
            else
            echo > "$PM_RTC/wakealarm"
            fi
        else
            # when do_suspend is being called, convert to suspend_hybrid.
            do_suspend_hybrid
        fi      
    }
fi

if [ -z "$HIBERNATE_MODULE" ] && \
    [ -f /sys/power/disk ] && \
    grep -q disk /sys/power/state && \
    [ -c /dev/snapshot ] &&
    command_exists s2disk; then
    HIBERNATE_MODULE="uswsusp"
    do_hibernate()
    {
        s2disk
    }
fi

if [ -z "$SUSPEND_HYBRID_MODULE" ] && 
    grep -q mem /sys/power/state && \
    command_exists s2both && \
    check_hibernate; then
    SUSPEND_HYBRID_MODULE="uswsusp"
    do_suspend_hybrid()
    {   
        uswsusp_get_quirks
        s2both --force $OPTS 
    }
    if [ "$METHOD" = "suspend_hybrid" ]; then
        add_before_hooks uswsusp_hooks
        add_module_help uswsusp_help
    fi
fi

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