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Dual graphics: remove discrete use only Intel?

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01 Staff's picture
01 Staff (not verified)

Jan 16, 2014 - 05:35am

  • 01 Staff's picture
    01 Staff (not verified)

    My system has two GPUs, a dGPU: AMD 8670M, and an Intel HD 4400 (i915 driver). I currently have the proprietary fglrx drivers installed, and the ability to select either card (via aticonfig, and ultimately powerxpress).

    I'm running Ubuntu 12.04.4 LTS.  

    If I select the discrete card things are buggy for reasons not worth getting into here, and if I selectthe Intel card I get a problem that when the computer has been inactive for sometime and the screensaver has been running, I often come back to simply a black screen on which only the mouse cursor is moveable, needing then to restart. Obviously very annoying.

    I have absolutely no need for fancy graphics, so the Intel alone (if it didn't do this inactivity crash/freeze thing) would be just fine.

    I have two questions:

    1) If i simply remove the fglrx drivers from my system, will the system still boot up from the i915 driver with the Intel card or will my system be mangled?

    2) How can I check what version of the i915 driver I have, and how can upgrade them (given my Ubuntu version isn't supported by the graphical installer) there a way to do it manually?

    Jan 16, 2014 - 05:35am
  • bucic's picture
    bucic (not verified)

    You should uninstall fglrx / catalyst strictly following the procedure provided by your distribution documentation. Not doing so will almost certainly leave you with an unbootable system.

    Once you have uninstalled fglrx and made sure your system boots, you should disable your discrete graphics in bios/uefi. If no such option is available you should follow documentation on dual graphics provided by your distribution.

    Feb 02, 2014 - 11:22am
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