Y460 disable exclusive display in Ubuntu

Recently, it was found that the temperature was very high after ubuntu was installed in y460, And the fan turned very loud. If you want to turn off the dedicated display and turn it into an integrated video card, the fan will have almost no sound.

BecauseKernel Versions later than 2.6.37 can directly support dual-Card Switching, so it is quite simple.

The following describes the specific steps:

1. First enter Root User Permissions Su

2. Switch the video card to an integrated video card.Echo IgD>/sys/kernel/debug/vgaswitcheroo/Switch

3. Disable Integrated Video CardEcho off>/sys/kernel/debug/vgaswitcheroo/Switch

Then, check whether the execution is successful and run the following command:CAT/sys/kernel/debug/vgaswitcheroo/Switch

After successful, the following message is displayed:

0: IgD: +: PWR: 0000: 00: 02.0
1: DIS: off: 0000: 01: 00.0
2: DIS-Audio: off: 0000: 01: 00.1

After success, the sound of the sound fan will be much smaller, which can also be used as a basis for judgment.

If the command takes effect after each boot, add the preceding switch statement to the boot script. The specific steps are as follows:

1. First enter Root User Permissions Su

2. Modify/etc/rc. Local and add it before exit 0 of the file.

Echo IgD>/sys/kernel/debug/vgaswitcheroo/Switch

Echo off
>/Sys/kernel/debug/vgaswitcheroo/Switch

3. Save the changes.