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:
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:
/etc/default/grub
的video.only_lcd=0
添加到GRUB_CMDLINE_LINUX_DEFAULT
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.
GRUB_CMDLINE_LINUX_DEFAULT="nomodeset"
GRUB_CMDLINE_LINUX_DEFAULT="i915.alpha_support=1"
update-grub
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