主页 / ubuntu / 问题 / 980997
Accepted
pa4080
Asked: 2017-11-28 23:37:47 +0800 CST

当盖子被扭曲或关闭时，如何禁用触摸板？

  • 772

我有 Ubuntu 16.04 的联想 ThinkPad X230 平板电脑。它有一个可转换的屏幕，当它处于平板电脑模式时，触摸板仍然处于活动状态并弄得一团糟。

我创建了以下脚本并将其绑定到内置按钮之一（通过自定义快捷方式）：

#!/bin/bash -e

# Find the TouchPad device ID
ID="$(xinput | grep -ioP 'touchpad.*id=\K[0-9]*')"                                  

if   [ "$(LANG=C xinput --list-props "$ID" | awk 'NR==2{print $4}')" == "0" ]; then 
        # If the device is disabled, then enable it and kill 'onboard' virtual keyboard
        xinput enable "$ID"; killall onboard; xrandr -o normal
elif [ "$(LANG=C xinput --list-props "$ID" | awk 'NR==2{print $4}')" == "1" ]; then
        # If the device is enabled, then disable it and run 'onboard' virtual keyboard
        xinput disable "$ID"; nohup onboard >/dev/null 2>&1 &
fi

该脚本工作正常，但这是一个虚假的解决方案，昨天我花了几个小时来学习如何以正确的方式做到这一点。所以我决定在这里分享这个经验。

command-line

3 个回答

  1. Best Answer

    要检查设备是否处于平板电脑模式，我们可以读取以下值（0或1）：

    /sys/devices/platform/thinkpad_acpi/hotkey_tablet_mode

    该值由特定事件切换。我们可以捕获这些事件，并可以使用acpid高级配置和电源接口事件守护程序将脚本绑定到它们。

    1.抓住事件。执行acpi_listen或netcat -U /var/run/acpid.socket，在平板模式下转动盖子，然后将其转回。这是一个示例输出：

    $ acpi_listen
video/tabletmode TBLT 0000008A 00000001
video/tabletmode TBLT 0000008A 00000000

    请注意，当盖子关闭/打开时，结果会有所不同：

    $ acpi_listen
button/lid LID close
button/lid LID open

    2.配置acpid识别设备模式改变触发的事件。将以下行作为（单个）命令运行到终端中：

    cat << EOF | sudo tee /etc/acpi/events/thinkpad-tablet-enabled
# /etc/acpi/events/thinkpad-tablet-enabled
# This is called when the lid is placed in tablet position on
# Lenovo ThinkPad X230 Tablet

event=video/tabletmode TBLT 0000008A 00000001
action=/etc/acpi/thinkpad-touchpad-twist-mode.sh 1
EOF

    cat << EOF | sudo tee /etc/acpi/events/thinkpad-tablet-disabled
# /etc/acpi/events/thinkpad-tablet-disabled
# This is called when the lid is placed in normal position on
# Lenovo ThinkPad X230 Tablet

event=video/tabletmode TBLT 0000008A 00000000
action=/etc/acpi/thinkpad-touchpad-twist-mode.sh 0
EOF

    上述命令将创建文件：

    • /etc/acpi/events/thinkpad-tablet-enabled
    • /etc/acpi/events/thinkpad-tablet-disabled

    注意：此处不提供盖子打开/关闭的脚本。但它们与上述类似。

    3.重新启动acpid，以便它可以重新读取事件过滤器，包括您刚刚添加的过滤器：

    sudo systemctl restart acpid.service

    4./etc/acpi/thinkpad-touchpad-in-twist-mode.sh创建将禁用1和启用0触摸板的脚本（&&使其可执行）：

    cat << EOF | sudo tee /etc/acpi/thinkpad-touchpad-twist-mode.sh && sudo chmod +x /etc/acpi/thinkpad-touchpad-twist-mode.sh
#!/bin/sh
LANG=C                                                                                                        # Ensure stable parsing
export DISPLAY="\$(w | awk 'NF > 7 && \$2 ~ /tty[0-9]+/ {print \$3; exit}' 2>/dev/null)"                      # Get and export the current user's \$DISPAY
export XAUTHORITY="/home/\$(w | awk 'NF > 7 && \$2 ~ /tty[0-9]+/ {print \$1; exit}' 2>/dev/null)/.Xauthority" # Get and export the currentuser's \$XAUTHORITY
ID="\$(xinput | grep -ioP 'touchpad.*id=\K[0-9]*')"                                                           # Find the TouchPad device ID

if   [ "\${1}" -eq 0 ]; then xinput enable "\$ID"   # Laptop mode or Lid is open
elif [ "\${1}" -eq 1 ]; then xinput disable "\$ID"  # Tablet mode or Lid is closed
fi
EOF
    • 该脚本将解析和导出当前用户会话的环境变量$DISPAY和环境变量$XAUTHORITY，以便分别允许root（谁运行acpid进程）访问用户的 X 会话xinput。
    • 然后脚本将解析$ID触摸板的。根据输入变量的值，$1它将启用或禁用触控板。

    注意：美元符号前的反斜杠\$旨在转义命令中的变量（命令替换）扩展cat。因此，如果您复制/粘贴脚本（而不是使用该cat方法），您应该手动删除它们。

    参考：

    • 2

  2. 使用 pa4080 的答案，我必须对其进行更改才能在 Ubuntu 18.04 中工作：在脚本中硬编码我的用户 ( tim) 并在我的用户上下文中运行脚本。

    文件/etc/acpi/events/thinkpad-lid-event：

    event=button/lid.*
action=su tim -c '/home/tim/scripts/lid.sh.post'

    和lid.sh.post：

    #! /bin/bash
# toggle touchpad enabled status when lid changes (lid closed,touchpad off)
# is run in user context
# 
# example rule /etc/acpi/events/thinkpad-lid-close
# event=button/lid.*
# action=su tim -c '/home/tim/scripts/lid.sh.post'  
#
# see https://askubuntu.com/questions/91534/disable-touchpad-while-the-lid-is-down
# and https://askubuntu.com/questions/980997/how-do-i-disable-the-touchpad-when-the-lid-is-twisted-or-closed/980999#980999
# this needs an event defined in /etc/acpi/events to call this script when lid status changes
# these variables need to be set to use xinput properly
user="tim"
export XAUTHORITY=$(ls -1 /home/$user/.Xauthority | head -n 1)
export DISPLAY=":$(ls -1 /tmp/.X11-unix/ | sed -e s/^X//g | head -n 1)"

export TouchPadID=$(xinput | grep 'TouchPad' | sed  -n "s/^.*id=\([[:digit:]]\+\).*$/\1/p")
grep -q closed /proc/acpi/button/lid/*/state
LidClosedResult=$?
xinput set-int-prop  $TouchPadID "Device Enabled" 8 $LidClosedResult
if [ $? -eq 0 ]; then
  echo "for user: $user xinput device $TouchPadID enabled status changed to $LidClosedResult because of LID ACPI event" | systemd-cat
else
  echo "failed to change xinput device $TouchPadID enabled status after LID ACPI event" | systemd-cat
fi
    • 1

  3. 对 'lid' 和 'tabletmode' 进行了另一个变体，只有 2 条规则捕获 ACPI 事件的响应（在操作中使用“%e”，注意引号！）：

    #!/bin/bash
# toggle 'touchpad enabled status' off/on when lid changes (lid closed or tablet mode => touchpad off)
# 
# let it act on 2 rules in /etc/acpi/events/: lid-change and tabletmode-change:
# 
#     event=button/lid.*
#     action=/etc/acpi/touchpad-toggle.sh "%e"
#
#     event=video/tabletmode.*
#     action=/etc/acpi/touchpad-toggle.sh "%e"
#


# variables needed to use xinput properly
user1="$(who | cut -d ' ' -f1)"
export XAUTHORITY="$(ls -1 /home/$user1/.Xauthority | head -n 1)"
export DISPLAY=":$(ls -1 /tmp/.X11-unix/ | sed -e s/^X//g | head -n 1)"
export TPdID="$(xinput | grep -ioP 'touchpad.*id=\K[0-9]*')"

if [ "${@}" == "" ]; then
    echo "ACPI event didn't return trigger values." | systemd-cat
elif [ "$user1" == "" ]; then
    echo "ACPI event action didn't find current user." | systemd-cat
else
    false
    if   [ "${@}" == "button/lid LID open" ]; then xinput enable $TPdID
    elif [ "${@}" == "button/lid LID close" ]; then xinput disable $TPdID
    elif [ "${@}" == "video/tabletmode TBLT 0000008A 00000000" ]; then xinput enable $TPdID
    elif [ "${@}" == "video/tabletmode TBLT 0000008A 00000001" ]; then xinput disable $TPdID
    fi
    if [ $? -eq 0 ]; then
        echo "ACPI event: xinput device $TPdID status changed on ${@}." | systemd-cat
    else
        echo "ACPI event failed: xinput device $TPdID status NOT changed on ${@}." | systemd-cat
    fi
fi

    享受使用脚本...

    编辑： $USER 在由 root 使用时并不总是返回结果......所以我用它替换了它： user1="$(who | cut -d ' ' -f1)"

    • 1

相关问题