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Ubuntu 12.04 Turn Off Discrete Graphic Card on Boot

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linux-howto

http://ubuntuguide.net – This simple tutorial will explain how to turn off discrete card on a Ubuntu laptop with two graphic cards. Discrete graphic card takes up more energy and the processor usage. If you seldom use the discrete card, follow the steps to turn it off. 1. On Ubuntu, hit Ctrl+Alt+T to launch a terminal window. Copy and paste this command in terminal, and hit enter to switch to hybrid graphics: echo IGD > /sys/kernel/debug/vgaswitcheroo/switch 2. Then execute this command to temporarily turn off discrete card: echo OFF > /sys/kernel/debug/vgaswitcheroo/switch If the indicator lamp runout, follow step 3 (HowTos)

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Submitted by more on 08/10/2012 – Made popular on 08/10/2012

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This tutorial is going to show you how to turn on/off the discrete nVidia graphics card on nVidia Optimus Ubuntu laptop. For now, nVidia Optimus doesn’t support Linux system.

My laptop uses a hybrid graphics hardware.

Using the vgaswitcheroo I am able to power off either card and switch between them correctly.

The issue is that the system wakes up/resumes from suspend correctly only when using the discrete graphics, or atleast the discrete graphics must be powered on even if the display is connected to the onboard intel card.

Has anyone faced this issues?

Hi I'm trying to change my integrated graphics card to my discrete graphics card (Nvidia GeForce 540m) and when I use the vgaswitcheroo method, I can't access the file doing this:

$ls -l /sys/kernel/debug/vgaswitcheroo/switch ls: cannot access /sys/kernel/debug/vgaswitcheroo/switch: Permission denied

This is the link to the guide on using vgaswitcheroo I'm using: https://help.ubuntu.com/communi

hi there. i am going to buy a new laptop with an intel i7 cpu and a discrete video. and as far as i understood, there is no way to find high-performance laptop without this troublesome hybrid graphic feature =(

the question is - what is more problematic, nvidia or ati card?

Im new to linux scripts.

And also this:http://www.x.org/wiki/RadeonFeatureParticullaryThere are two versions of hybrid graphics: MUXed and MUX-less. MUXed have a display MUX to switch the displays between the discrete and integrated cards. MUXed systems can be switched using vgaswitcheroo. MUX-less do not have a display MUX and the displays are only connected to the integrated card.

I was in the same situation as you earlier today and I'm using the open source drivers. I didn't think there would be a way to disable one of the two AMD cards but vgaswitcheroo turned out working just fine.

VGASwitcheroo in Fedora 18 10 weeks 12 hours ago

How can I enable vgaswitcheroo in Fedora 18??? TO be honest with you all, this is the only thing that has kept me away from fedora and sticking with Ubuntu. I cannot find any tutorials or post that explains how to enable vgaswitcheroo in neither fedora 17 nor 18.

The file "/sys/kernel/debug/vgaswitcheroo/switch" is missing so I don;t know what else I have to do.

I tried to to use the ACPI call method ( http://linux-hybrid-graphics.blogspo...tch-onoff.html ) using 'echo '\_SB.PCI0.PEGR.GFX0._OFF' > /proc/acpi/call'.

As it has been reported, this works in switching off the graphic card but 10 seconds later the laptop fan starts spinning at full speed.

Also I'm not savvy enough to get 'asus switcheroo' to work...

Some fellow proprietary help, please ;)