经过多次更改失败重装后终于在官网的answers找到了解决办法:
1、解决reboot后无法保存屏幕亮度:
[cpp]
- sudo gedit /etc/rc.local
- 打开后你会看到如下内容:
- #!/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.
- #exit 0
插入这句话到代码中:
echo 0 > /sys/class/backlight/acpi_video0/brightness
保证修改后代码如下,注意exit前的“#”[cpp]
- #!/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 0 > /sys/class/backlight/acpi_video0/brightness
- exit 0
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
保存后退出,重启就可以了。
注意:大多数人都是acpi_video0,根据自己/sys/class/backlight/下面文件决定
2、亮度调节
亮度调节依赖与你的bios和内核版本,你可以尝试以下代码:
kernel boot选项:
当你启动系统时,出现在grup的屏幕时,按e键进行编辑,在kernel这一行添加:
[cpp]
- nomodeset acpi_backlight=vendor
[cpp]
- Intel – nomodeset acpi_backlight=intel Acer – acpi_backlight=acer_acpi or even acpi_osi=Linux acpi_backlight=legacy.
[cpp]
- quiet splash nomodeset acpi_backlight=vendor
/etc/default/grub
[cpp]
- # command line
- sudo -e /etc/default/grub
- # graphical
- gksu gedit /etc/default/grub
[cpp]
- GRUB_CMDLINE_LINUX_DEFAULT=“quiet splash nomodeset acpi_backlight=vendor”
[cpp]
- sudo update-grub