笔记本电脑显示器亮度不能调整 18.04

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ubuntu

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问题

我最近在XPS 15 9560上安装了Ubuntu mate 18.04,但出现无法调整显示亮度,我尝试了以下操作:

  • 在引导参数中设置acpi_backlight =vendor
  • 已使用xbacklight,它结果如下
  • 
    xypnox@xypnox-xps:~$ xbacklight -set 50
    
    
    No outputs have backlight property
    
    
    
    

    sudo find /sys/ -type f -iname '*brightness*'

    
    xypnox@xypnox-xps:~$ sudo find /sys/ -type f -iname '*brightness*'
    
    
    /sys/devices/platform/dell-laptop/leds/dell::kbd_backlight/brightness_hw_changed
    
    
    /sys/devices/platform/dell-laptop/leds/dell::kbd_backlight/max_brightness
    
    
    /sys/devices/platform/dell-laptop/leds/dell::kbd_backlight/brightness
    
    
    /sys/devices/platform/i8042/serio0/input/input4/input4::capslock/max_brightness
    
    
    /sys/devices/platform/i8042/serio0/input/input4/input4::capslock/brightness
    
    
    /sys/devices/platform/i8042/serio0/input/input4/input4::numlock/max_brightness
    
    
    /sys/devices/platform/i8042/serio0/input/input4/input4::numlock/brightness
    
    
    /sys/devices/platform/i8042/serio0/input/input4/input4::scrolllock/max_brightness
    
    
    /sys/devices/platform/i8042/serio0/input/input4/input4::scrolllock/brightness
    
    
    /sys/module/video/parameters/brightness_switch_enabled
    
    
    /sys/module/i915/parameters/invert_brightness
    
    
    
    

  • 答案1

    我在Dell XPS 13上遇到了同样的问题,找到了这个链接,解决了这个问题:https://bugs.archlinux.org/task/58296#comment168869

    我做了什么:

  • 通过将/etc/default/grubvideo.only_lcd=0添加到GRUB_CMDLINE_LINUX_DEFAULT
  • 使用sudo update-grub更新grub
  • 重新启动笔记本电脑后,然后我就能够控制亮度了。


    答案2

    更新内核之后,问题就解决了。

    要下载最新的稳定内核(正常工作):http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.16.6/

    在例子中,我下载了:

    
     linux-headers-4.16.6-041606_4.16.6-041606.201804300418_all.deb
    
    
    
     linux-headers-4.16.6-041606-generic_4.16.6-041606.201804300418_amd64.deb
    
    
    
     linux-image-unsigned-4.16.6-041606-generic_4.16.6-041606.201804300418_amd64.deb
    
    
    
     linux-modules-4.16.6-041606-generic_4.16.6-041606.201804300418_amd64.deb
    
    
    
    

    答案3

    以下是3个简单步骤:

    
    $ sudo add-apt-repository ppa:apandada1/brightness-controller
    
    
    $ sudo apt update
    
    
    $ sudo apt install brightness-controller
    
    
    
    

    然后找到它。

    Brightness Controller

    在你的应用程序/附件中


    答案4

    问题通过以下步骤解决,带intel VGA兼容驱动程序的Dell Latitude 5590.

  • 用nomodeset选项安装ubuntu
  • 已经将BIOS更新为1.2.3
  • 已更新/etc/default/grub
  • 
    GRUB_CMDLINE_LINUX_DEFAULT="nomodeset"
    
    
    
    
    
    GRUB_CMDLINE_LINUX_DEFAULT="i915.alpha_support=1"
    
    
    
    
     
    update-grub
    
    
    
    


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