backlight:acpi_video0:没有这样的设备

Question

我安装了两个星期的Arch。作为显示管理器，我已经安装了LightDM。

有几天，我从lightdm.service和systemd@.service得到了一个错误的系统引导。

我只看到一个黑色显示器，必须登录关于另一个tty。

来自systemd@..service的日志说，我没有设备acpi_video0。

-- Reboot --
Sep 19 13:30:39 markus-pc systemd[1]: Starting Load/Save Screen Backlight Brightness of backlight:acpi_video0...
Sep 19 13:30:39 markus-pc systemd-backlight[453]: Failed to get backlight or LED device 'backlight:acpi_video0': No such device
Sep 19 13:30:39 markus-pc systemd[1]: systemd-backlight@backlight:acpi_video0.service: Main process exited, code=exited, status=1/FAILURE
Sep 19 13:30:39 markus-pc systemd[1]: Failed to start Load/Save Screen Backlight Brightness of backlight:acpi_video0.
Sep 19 13:30:39 markus-pc systemd[1]: systemd-backlight@backlight:acpi_video0.service: Unit entered failed state.
Sep 19 13:30:39 markus-pc systemd[1]: systemd-backlight@backlight:acpi_video0.service: Failed with result 'exit-code'.

Arch 维基页描述了每个设备在/sys/class/backlight中都有一个目录，但我没有目录。

markus@markus-pc:~$ ls -la /sys/class/backlight/
insgesamt 0
drwxr-xr-x  2 root root 0 19. Sep 13:53 .
drwxr-xr-x 51 root root 0 19. Sep 13:53 ..

当我启动桌面环境肉桂并告诉systemd@..service，他必须使用这个图形卡来显示LightDM时，我如何才能找到我实际使用的图形卡？

这是我的LightDM错误。

-- Reboot --
Sep 19 13:49:19 markus-pc systemd[1]: Starting Light Display Manager...
Sep 19 13:49:19 markus-pc systemd[1]: Started Light Display Manager.
Sep 19 13:49:37 markus-pc systemd[1]: Starting Light Display Manager...
Sep 19 13:49:37 markus-pc systemd[1]: Started Light Display Manager.
Sep 19 13:49:38 markus-pc lightdm[836]: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Sep 19 13:49:39 markus-pc systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
Sep 19 13:49:39 markus-pc systemd[1]: lightdm.service: Unit entered failed state.
Sep 19 13:49:39 markus-pc systemd[1]: lightdm.service: Failed with result 'exit-code'.
Sep 19 13:49:39 markus-pc systemd[1]: lightdm.service: Service hold-off time over, scheduling restart.
Sep 19 13:49:39 markus-pc systemd[1]: Stopped Light Display Manager.
Sep 19 13:49:39 markus-pc systemd[1]: lightdm.service: Start request repeated too quickly.
Sep 19 13:49:39 markus-pc systemd[1]: Failed to start Light Display Manager.
Sep 19 13:49:39 markus-pc systemd[1]: lightdm.service: Unit entered failed state.
Sep 19 13:49:39 markus-pc systemd[1]: lightdm.service: Failed with result 'exit-code'

Answer 1

编辑文件/etc/default/grub并将以下参数添加到GRUB_CMDLINE_LINUX_DEFAULT中：

$ sudo nano /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT=“安静的acpi_osi=Linux acpi_backlight=vendor”

不要忘记之后运行sudo update-grub。