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I have been trying to blacklist my open source AMD Radeon driver so that my system will use only the Intel HD 4000 Ivy bridge graphics. What is the proper procedure? I am using xserver-xorg-video-ati, currently.

The settings in the BIOS of my HP Envy 15t-3200 machine does not show any configuration option for disabling the discrete graphics card, unfortunately, so I'm looking for a way to do this in the OS.

  • The BIOS on my laptop (HP Envy 15t-3200) does not have a BIOS option for disabling, or choosing, which adapter I'd like to use exclusively.
  • vgaswitcheroo does not apply to my hardware configuration.
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    Have you tried disabling the discrete graphics in your system's BIOS? And possible duplicate: askubuntu.com/questions/217467/disable-discrete-graphics
    – gertvdijk
    Dec 28, 2012 at 15:44
  • Note: The BIOS on my laptop (HP Envy 15t-3200) does not have a BIOS option for disabling, or choosing, which adapter I'd like to use exclusively.
    – Dean Howell
    Dec 28, 2012 at 16:03
  • possible duplicate of Ubuntu 12.04 hybrid graphics turn off discrete card on boot
    – Tom Brossman
    Dec 28, 2012 at 20:33
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    Tom, vgaswitcheroo does not apply to my hardware configuration. At the time of this writing this question has only gotten 14 views. May we please allow for it to reach a more varied audiance before it is voted as closed?
    – Dean Howell
    Dec 28, 2012 at 21:45
  • 2
    You need to put that kind of info in the question (I've added it in), otherwise it just reads like a duplicate to reviewers.
    – Jorge Castro
    Dec 29, 2012 at 6:09

2 Answers 2

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vgaswitcheroo applies if there is a free driver from linux kernel and kernel modesetting is activated. So it should work if there is no fgrlx installed. I made my Sony VPCSA with similar setup (Intel 4000, Radeon 6600M) working.

I replaced a line in /etc/defalut/grub (1):

GRUB_CMDLINE_LINUX="video.allow_duplicates=1 radeon.modeset=1"

It fixed the problem for Ubuntu 12.10. However, that's not enough for Debian/unstable. In addition, I had to add a line to /etc/modprobe.d/blacklist.conf (2):

blacklist radeon

And to /etc/rc.local BEFORE exit 0; (3):

modprobe radeon modeset=1
mount -t debugfs none /sys/kernel/debug/
echo OFF > /sys/kernel/debug/vgaswitcheroo/switch

If you have issues, start with (2). It has reliably resulted in a bootable system, than proceed with (3).

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I think that this issue also wasn't resolved on other operating systems (Windows) - so seems like this is hardware issue rather than software.

Upd: here is some additional info http://h30434.www3.hp.com/t5/Notebook-Display-and-Video-e-g-Windows-8/HP-Envy-17-3D-CTO-3200-HD-4000-graphics-WiDi-locked-out-of/td-p/1630785

and http://reviews.cnet.com/laptops/hp-envy-17t-3200/4864-3121_7-35328488.html

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