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为所有运行级别设置启动时的默认亮度级别

tag-icon • tag-icon linux-mint acpi brightness
为所有运行级别设置启动时的默认亮度级别

笔记本电脑：东芝 R630
操作系统：Linux Mint 14 Cinnamon

我看过各种文章（https://askubuntu.com/questions/151651/brightness-is-reset-to-maximum-on-every-restart）关于调整亮度。但我的笔记本电脑似乎有不止一种使用 /sys fs 调整亮度的方法。

/sys/class/backlight$ ls -l
total 0
lrwxrwxrwx 1 root root 0 Feb 24 11:56 acpi_video0 -> ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video0
lrwxrwxrwx 1 root root 0 Feb 24 12:18 intel_backlight -> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight
lrwxrwxrwx 1 root root 0 Feb 24 12:18 toshiba -> ../../devices/LNXSYSTM:00/device:00/TOS6208:00/backlight/toshiba
  1. 为什么有不止一种方法？它们之间有什么区别？
  2. 哪种是为所有运行级别设置初始亮度的首选方法？
  3. toshset如何安装？我不记得自己安装过。 Mint 是否根据已确定的制造商进行安装？
$ dpkg -l | g toshset
ii  toshset                                     1.76-4                                    amd64        Access much of the Toshiba laptop hardware interface

$ dpkg -L toshset
/.
/etc
/etc/pm
/etc/pm/sleep.d
/etc/pm/sleep.d/novatel_3g_suspend
/usr
/usr/share
/usr/share/doc
/usr/share/doc/toshset
/usr/share/doc/toshset/supported-models.txt
/usr/share/doc/toshset/README.IrDA
/usr/share/doc/toshset/copyright
/usr/share/doc/toshset/README.video
/usr/share/doc/toshset/toshiba-acpi
/usr/share/doc/toshset/toshiba-acpi/2.6.28
/usr/share/doc/toshset/toshiba-acpi/2.6.28/Makefile
/usr/share/doc/toshset/toshiba-acpi/2.6.28/toshiba_acpi.c
/usr/share/doc/toshset/toshiba-acpi/2.6.28/install.sh
/usr/share/doc/toshset/toshiba-acpi/2.6.26
/usr/share/doc/toshset/toshiba-acpi/2.6.26/Makefile
/usr/share/doc/toshset/toshiba-acpi/2.6.26/toshiba_acpi.c
/usr/share/doc/toshset/toshiba-acpi/2.6.26/install.sh
/usr/share/doc/toshset/README
/usr/share/doc/toshset/changelog.Debian.gz
/usr/share/doc/toshset/README.Debian
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/toshset.1.gz
/usr/share/man/man1/toshsat1800-irdasetup.1.gz
/usr/sbin
/usr/sbin/toshsat1800-irdasetup
/usr/bin
/usr/bin/toshset

答案1

你应该做的是手动修改亮度，同时检查修改的是哪个亮度文件。

例如

$ ls -l
total 0
lrwxrwxrwx 1 root root 0 Feb 24 14:02 dell_backlight -> ../../devices/platform/dell-laptop/backlight/dell_backlight
lrwxrwxrwx 1 root root 0 Feb 24 14:02 intel_backlight -> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight

更改亮度并检查正在修改哪个文件：

$ cat intel_backlight/brightness 
978

然后无论要修改哪个，都将其预设在rc.local：

$ cat /etc/rc.local
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
echo 978 > /sys/class/backlight/intel_backlight/brightness
exit 0

这对我的戴尔有用，并且与您链接的问题中提供的答案不同。

答案2

请注意 - 在 Gentoo 系统上正确的文件是/etc/local.d/brightness.start（该文件需要设置可执行位）。我的文件中有此内容。

它将所有设备上的亮度增加到最大值：

#!/bin/bash

for dev in /sys/class/backlight/* ; do
    cd $dev
    cat max_brightness > brightness
done
exit 0

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