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I have installed ironhide using ppa [11.10 - 32 bit, Dell xps 15]. After rebooting I tried to disable nvidia gpu using the command "sudo ironhide-disablecard". I got message as "ERROR : no module for nvidia found at /proc/modules" and "nvidia card disabled successfully". Is it a normal behavior? Please note I tried disabling the card without trying to enable it. 

Thank You
Pavan
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  • I would try installing Bumblebee 3.0. A bit of info here: http://askubuntu.com/questions/36930/how-well-do-laptops-with-nvidia-optimus-work/36936#36936 – 719016 Feb 18 '12 at 11:34
  • Did you try a recent version of Ubuntu and Bumblebee? – 719016 Jun 09 '12 at 15:11

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Currently ironhide is no longer maintained. You should install Bumblebee instead using the bumblebee/stable ppa.

But to answer your question: "Disabling" the nvidia card in this way does nothing. By default the nvidia card is not used, only when using optirun <command>. The nvidia card cannot be disabled any more then to deprive it of it's drivers and run on intel only.

However there is a possible workaround I read, which is to reverse engineer the windows drivers to find the ACPI calls needed, then create a script for it yourself. Not recommended unless you are an expert on this.

Beanow
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    As a Bumblebee developer, I can tell you for sure that we're not reverse engineering the Windows drivers. After analysis of a lot ACPI tables, I crafted a new module for toggling the power. Expect the new release within two weeks. – Lekensteyn Jan 03 '12 at 09:38
  • That's another way to find them. Didn't mean to suggest you were doing so. Great to hear this development. I look forward to it! – Beanow Jan 03 '12 at 10:07
  • FYI, Bumblebee 3.0 has been released a few days ago and detects the right method automatically. There is no need for customizing ACPI calls anymore. http://askubuntu.com/a/36936/6969 – Lekensteyn Jan 26 '12 at 13:52
  • Ty, running it with great enjoyment of my added battery time and greater resolutions on my MiniDP. – Beanow Jan 27 '12 at 16:12