Laptop安装linux系统后,开机默认亮度是最大,每次开机都很刺眼,开机后调节好亮度后,重启又恢复了。现在介绍可以永久设置屏幕亮度的方法,这样就不用每次开机都设置亮度那么麻烦。
调节亮度的方法是:Fn+左右键
首先查看自己的显卡亮度控制文件是哪种
ls /sys/class/backlight/
一般没有独显的电脑显示的是acpi_video0
有独显的电脑则显示intel_backlight
如果亮度控制文件是acpi_video0
打开/etc/rc.local文件
sudo vi /etc/rc.local
在exit 0前一行加入如下代码
echo 0 > /sys/class/backlight/acpi_video0/brightness
保存退出,重启就可以了
其中echo 后面的值为0-10,对应为0到100%,如echo 5表示一半亮度
如果亮度控制文件是intel_backlight
首先修改grub
sudo gedit /etc/default/grub
把GRUB_CMDLINE_LINUX=""改为GRUB_CMDLINE_LINUX="acpi_backlight=vendor"
修改后文件代码如下
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'
GRUB_DEFAULT=0
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX="acpi_backlight=vendor"
# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"
# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console
# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480
# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true
# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"
# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"
更新grub.cfg
sudo update-grub
修改亮度文件,方法和没有独显的电脑一样
sudo vi /etc/rc.local
echo 150 > /sys/class/backlight/intel_backlight/brightness
保存退出,重启就可以了
注意这里echo后面的数值和没有独显的不同,具体自己调一下看看
调节方法是进入root模式调节
sudo su
echo 150 > /sys/class/backlight/intel_backlight/brightness
不断修改echo后面的值找到最适合的值
本文内容由网友自发贡献,版权归原作者所有,本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容,请联系:hwhale#tublm.com(使用前将#替换为@)