Install the N-card driver in CentOS and solve the problem of unadjustable screen brightness.

Install the N-card driver on CentOS and solve the problem of unadjustable screen brightness. First, go to the Nvidia official website to download the corresponding video card driver. Note that the language is English and the Chinese language cannot be downloaded. Http://www.nvidia.cn/Download/index.aspx? Lang = cn (using wget for download, you can use axel for download to speed up the download), how to install it? 1. install gcc (required when the video card driver is installed) 2. disable The Nouveau kernel driver, refer to http://www.bkjia.com/ OS /201306/222161.html 3. install the kernel-devel package in linux. If this package is not installed, the system will prompt: error: unable to find the kernel source tree for the currently running kernel. please make sure you have installed the kernel source files for your kernel and that htey are properly configured; on red hat linux system, for example, be sure you have the 'kernel-source' or 'Kernel-devel 'RPM installed. if you know the correct kernel source files are installed, you may specify the kernel source path with the '-- kernel-source-path' command line option. install the kernel-devel package: yum install kernel-devel-kernel version number (the kernel version number can be viewed through uname-r), and then specify the path when installing the video card driver :. /Nvidia *. sh-kernel-source-path =/usr/src/kernels/kernel version: after the latest N-card driver is installed, the screen brightness cannot be adjusted. Solution: Modify/etc/X11/xorg. con file, find Section "Dev Ice ", and then add a line of Option" RegistryDwords "" EnableBrightnessControl = 1 "before the corresponding EndSection to save and restart.