无法更改设置中的亮度

不是一个可能的重复:我的问题与Ubuntu 16.04 LTS中无法改变亮度的问题不一样,因为我在那里尝试了大部分解决方案并且它们无法正常工作。


每当我尝试使用系统设置 – >亮度和锁定 – >亮度滑块来更改亮度时,移动滑块无效,当我关闭系统设置时,滑块会返回到全亮度位置。

在此处输入图像描述 (将亮度滑块移至最小[无效]并关闭系统设置)

在此处输入图像描述 (重新打开亮度并锁定,滑块恢复到全亮度)

键盘上的按钮具有相同的效果。

lspci

 00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b) 00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev 0b) 00:14.0 USB controller: Intel Corporation 8 Series USB xHCI HC (rev 04) 00:16.0 Communication controller: Intel Corporation 8 Series HECI #0 (rev 04) 00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 1 (rev e4) 00:1c.2 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 3 (rev e4) 00:1c.3 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 4 (rev e4) 00:1d.0 USB controller: Intel Corporation 8 Series USB EHCI #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation 8 Series LPC Controller (rev 04) 00:1f.2 SATA controller: Intel Corporation 8 Series SATA Controller 1 [AHCI mode] (rev 04) 00:1f.3 SMBus: Intel Corporation 8 Series SMBus Controller (rev 04) 06:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01) 07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller (rev 07) 

lspci -nnk | grep -A2 VGA lspci -nnk | grep -A2 VGA

 00:02.0 VGA compatible controller [0300]: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) Subsystem: Dell Haswell-ULT Integrated Graphics Controller [1028:0651] Kernel driver in use: i915 

ls /sys/class/backlight/

 dell_backlight intel_backlight 

手动更改files /sys/class/backlight/xxx/brightness ,其中xxxdell_backlightintel_backlight替换,以确定哪个接口负责您的背光控制。

要更改/sys/class/backlight/xxx/brightness的值,请打开终端并运行:

 sudo bash -c "echo 5 > /sys/class/backlight/xxx/brightness;" 

然后创建/etc/X11/xorg.conf如果不存在并添加:

 Section "Device" Identifier "Card0" Driver "intel" Option "Backlight" "xxx" EndSection 

编辑/etc/X11/xorg.conf重启系统,让我知道它是否有效。 `