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I'm running Ubuntu 12.04 and I've got an NVIDIA graphics card that is currently active. I'd like to switch to using the graphics card on the motherboard without turning off the computer.

Is this possible? If so, how?

Edit: To make it clear, I can log off and on, but I cannot shut off or reboot the computer because other users are logged in remotely and running jobs.

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    Am I the only one that initially thought the question was about physically swapping 2 video boards out while powered on?... Man, that would be an awesome question. – Brian Adkins Jul 19 '12 at 1:07
  • More information would be nice. I'm assuming this is a desktop? Do you actually want to power down the other graphics card when you switch over to the integrated graphics? – Journeyman Geek♦ Jul 19 '12 at 2:27
  • Yes, it is a desktop. No, I'd like to leave it running. – user545424 Jul 19 '12 at 2:40
  • @user545424 maybe you make a bit clearer what your understanding of "turning off" implies: Would a reboot be acceptable (as it is, technically speaking, no "power-off")? Would a logout/re-login be? Or don't you want to close any running application (speaking of a "hot-swap")? – Izzy Jul 19 '12 at 10:09
  • @BrianAdkins Yeah, my first thought was: "Next question: How to replace the CPU without stopping any app from running" lol But reading the entire question, the meaning is quite clear. – Izzy Jul 19 '12 at 10:11
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If possible, it would be done via restarting Xorg with a config file that uses the intel driver (or other as appropriate for the on-board video) instead of the nouveau/nvidia driver.

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Three different ways to accomplish this

1) If possible try to disable it in the bios of your computer before it actually loads Ubuntu

2) blacklist it in the file /etc/modprobe.d/blacklist.conf then log out of Ubuntu and log back in.

3) just unplug the power to the graphics card and see if switches over to the onboard one

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  • I'm not really sure how to accomplish 1). 3) I don't want to stop the graphics card, I just want my display to run on the integrated graphics. – user545424 Jul 19 '12 at 1:00
  • who makes your motherboard and what is the model? – Jared Jul 19 '12 at 1:06
  • newegg.com/Product/Product.aspx?item=N82E16813131733 – user545424 Jul 19 '12 at 1:11
  • 1) would require at least a reboot. Though technicall this is no "turning off the computer", I guess the intention of the question excludes this. Similarly for 2) I guess, as the intention as I understood is temporarily re-route the output without stopping the running applications (@user545424 maybe you should make that a bit clearer in your question to avoid guesswork). – Izzy Jul 19 '12 at 10:06

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