如何在三星 90X3A 上启用显示器亮度键盘快捷键？

Question

我设置了三星 90X3A从头开始（使用 BIOS 引导以避免已知的相关问题Fn），并且我在启用屏幕亮度键（ +F2和Fn+ ）时遇到问题F3。

目前状态：

• 手动设置亮度的工作原理：

  sudo tee /sys/class/backlight/intel_backlight/brightness <<< 1000
  sudo tee /sys/class/backlight/acpi_video0/brightness <<< 50
  

• xbacklight作品：

  $ xbacklight -get
  100.000000
  

• Fn+F2和Fn+F3被正确检测：

  $ sudo evtest /dev/input/event0
    Input driver version is 1.0.1
  Input device ID: bus 0x11 vendor 0x1 product 0x1 version 0xab41
  Input device name: "AT Translated Set 2 keyboard"
  Supported events:
  […]
  Event code 224 (KEY_BRIGHTNESSDOWN)
  Event code 225 (KEY_BRIGHTNESSUP)
  […]
  Event: time […], type 4 (EV_MSC), code 4 (MSC_SCAN), value 89
  Event: time […], type 1 (EV_KEY), code 224 (KEY_BRIGHTNESSDOWN), value 1
  Event: time […], -------------- SYN_REPORT ------------
  Event: time […], type 4 (EV_MSC), code 4 (MSC_SCAN), value 89
  Event: time […], type 1 (EV_KEY), code 224 (KEY_BRIGHTNESSDOWN), value 0
  Event: time […], -------------- SYN_REPORT ------------
  Event: time […], type 4 (EV_MSC), code 4 (MSC_SCAN), value 88
  Event: time […], type 1 (EV_KEY), code 225 (KEY_BRIGHTNESSUP), value 1
  Event: time […], -------------- SYN_REPORT ------------
  Event: time […], type 4 (EV_MSC), code 4 (MSC_SCAN), value 88
  Event: time […], type 1 (EV_KEY), code 225 (KEY_BRIGHTNESSUP), value 0
  Event: time […], -------------- SYN_REPORT ------------
  

• ACPId 正在运行：

  $ systemctl is-active acpid
  active
  

• xmodmap不同意evtest（但请参阅下面尝试的解决方法）：

  $ xmodmap -pke | egrep '224|225'
  keycode 224 = XF86Messenger NoSymbol XF86Messenger
  keycode 225 = XF86Search NoSymbol XF86Search
  

但是，屏幕亮度不会改变。

有很多关于处理这个问题和类似问题的建议。这是我已经尝试过的：

• 一切推荐acpi_osi设置，使用 进行验证cat /proc/cmdline。
• acpi_osi=Linux acpi_backlight=vendor
• 列入黑名单samsung_laptop，使用 进行验证lsmod | grep samsung_laptop。

• 将以下内容添加到/etc/X11/xorg.conf：

  Section "Device"
      Identifier  "Card0"
      Driver      "intel"
      Option      "Backlight"  "intel_backlight"
  EndSection
  

• 设置xmodmap绑定：

  $ xmodmap -e 'keycode 224 = XF86MonBrightnessDown NoSymbol XF86MonBrightnessDown'
  $ xmodmap -e 'keycode 225 = XF86MonBrightnessUp NoSymbol XF86MonBrightnessUp'
  

其他可能相关的系统信息：

• X进程树：

  $ ps af -e --format user,cmd | sed "s/$USER/user  /g"
  USER     CMD
  […]
  root     /usr/bin/lightdm
  root      \_ /usr/lib/xorg-server/Xorg :0 -seat seat0 -auth /run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
  root      \_ lightdm --session-child 13 20
  user          \_ awesome
  user              \_ logger --priority user notice --tag xprofile-user
  user              \_ logger --priority user error --tag xprofile-user
  user              \_ xss-lock slock
  user              \_ cbatticon
  

Answer 1

现在我正在解决这个问题硬编码命令来处理 Awesome WM 中的 XF86 事件：

awful.key({}, "XF86MonBrightnessDown", function () awful.util.spawn_with_shell("xbacklight -dec 5") end),
awful.key({}, "XF86MonBrightnessUp", function () awful.util.spawn_with_shell("xbacklight -inc 5") end),

我仍然坚持寻找一种独立于窗口管理器来处理这个问题的解决方案。