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：原文链接 http://askubuntu.com/questions/3841/desktop-doesnt-remember-brightness-settings-after-a-reboot
1、解决reboot后无法保存屏幕亮度：
[cpp]view plaincopyprint?- 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
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]view plaincopyprint?- #!/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
#!/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]view plaincopyprint?
- nomodeset acpi_backlight=vendor
nomodeset acpi_backlight=vendor注意：有些硬件可能会是不同的选项.
[cpp]view plaincopyprint?
- Intel - nomodeset acpi_backlight=intel Acer - acpi_backlight=acer_acpi or even acpi_osi=Linux acpi_backlight=legacy.
Intel - nomodeset acpi_backlight=intel Acer - acpi_backlight=acer_acpi or even acpi_osi=Linux acpi_backlight=legacy.
我的电脑是acer 4830tg，我直接写的=vendor也是同样可以正常工作，你也可以通过google去查找你要设置的选项。
[cpp]view plaincopyprint?
- quiet splash nomodeset acpi_backlight=vendor
quiet splash nomodeset acpi_backlight=vendor 退出启动，如果能正常启动，就把这项选项添加到默认的选项中，编辑文件
/etc/default/grub
[cpp]view plaincopyprint?
- # command line
- sudo -e /etc/default/grub
- # graphical
- gksu gedit /etc/default/grub
# command line sudo -e /etc/default/grub # graphical gksu gedit /etc/default/grub 把这一行改成如下：
[cpp]view plaincopyprint?
- GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset acpi_backlight=vendor"
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset acpi_backlight=vendor" 保存，更新grup
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2012-2-14 10:13:19 |
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