Question

12

How to permanently switch off discrete graphic card?

rated 0 times [ 12] [ 0] / answers: 1 / hits: 15600 / 3 Years ago, mon, may 17, 2021, 5:42:10

I got a integrated GD, which is Intel, and another discrete GD, AMD Radeon 6490 HD
I am using ubuntu 11.10

1st, when I boot into Windows, my GD is indeed AMD Radeon 6490 HD, but when I boot into Ubuntu, it shows that I have AMD Radeon 6470 instead.

2nd, I try most methods only to install driver for my AMD/ATI graphic card. First by jockey(fail, boot with unity 2D instead) and install manually (fail, boot into blank screen).

3rd, I give up using the AMD/ATI graphic card. Then I got a new problem. Both my graphic cards are powered on on startup, which causes my laptop to over heat.

I view the content of /sys/kernel/debug/vgaswitcheroo/switch

0:DIS: :Pwr:0000:01:00.0

1:IGD:+:Pwr:0000:00:02.0

Then I switch off IGD using echo OFF > /sys/kernel/debug/vgaswitcheroo/switch and I get

0:DIS: :Off:0000:01:00.0

1:IGD:+:Pwr:0000:00:02.0

But after I reboot, the discrete graphic card is powered on again. How to solve this?

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fenddy

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4 Years ago

answered 3 Years ago utilitere · Accepted Answer

A simplistic way would be to add echo OFF > /sys/kernel/debug/vgaswitcheroo/switch to /etc/rc.local before the exit 0 so it looks like this:

#!/bin/sh -e

#

# rc.local

#

# This script is executed at the end of each multiuser runlevel.

# Make sure that the script will "exit 0" on success or any other

# value on error.

#

# In order to enable or disable this script just change the execution

# bits.

#

# By default this script does nothing.



echo OFF > /sys/kernel/debug/vgaswitcheroo/switch



exit 0