Disable amd for Ubuntu

This problem has been entangled for a long time. In Linux, the power management is not good enough. Moreover, it is not necessary to maintain the power consumption too hot.

However, at present, my BIOS does not support single-off independent graphics cards. I have found a solution on the UBUNTU Forum. For more information, see:

Http://forum.ubuntu.org.cn/viewtopic.php? T = 378610

The text is as follows:

The bios of my laptop does not support disabling the independent video card. In the process of using arch Linux, we found an article on arch wiki to switch amd + Intel dual-graphics cards. The link is as follows:Https://wiki.archlinux.org/index.php/Hybrid_graphics#ATI_Dynamic_Switchable_Graphics

Due to the strange driver problem, I have never used amd radeon hd6470 graphics card in Linux. However, based on the content on the Wiki, I can summarize how to disable amd graphics card. I tried it on Ubuntu and found it works. The method is as follows:

After editing/etc/rc. Local as root, it looks like this:

Code: Echo "off">/sys/kernel/debug/vgaswitcheroo/Switch

Exit 0

Restart, OK

If you want to know the principle, refer to the original article on arch Linux wiki: Https://wiki.archlinux.org/index.php/Hybrid_graphics#ATI_Dynamic_Switchable_Graphics