<p>I don't think SELinux has any bearing on the driver's ability to properly work with switchable graphics. Suggesting the OP turn it off is akin to suggesting a user run a segfaulting program as root. It addresses a problem that may not be relevant, and does so with complete overkill.</p>
<p>IIRC, Linux in general does not play nice with software switchable graphics. Unless there is a physical mechanism to switch between GPUs, you may be SOL. I will offer the off-the-cuff suggestion of explicitly defining your desired GPU and it's PCI bus id in xorg.conf.</p>
<p>Here's some reading, for your reference :</p>
<p> <a href="http://nouveau.freedesktop.org/wiki/Optimus">http://nouveau.freedesktop.org/wiki/Optimus</a></p>
<p> <a href="http://www.nvidia.com/object/linux-display-ia32-270.41.06-driver.html">http://www.nvidia.com/object/linux-display-ia32-270.41.06-driver.html</a>. (additional info tab)</p>
<div class="gmail_quote">On Oct 21, 2011 3:51 PM, "Adam Williamson" <<a href="mailto:awilliam@redhat.com">awilliam@redhat.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Fri, 2011-10-21 at 13:39 +0800, Zhang Di wrote:<br>
> Hello everyone,<br>
> Now I am using F16 beta version, after today's update, I was<br>
> random logged out just after I logged in.<br>
> My computer is Lenovo's Thinkpad T420, when I changed the display<br>
> to integrated graphic(intel), it can not work even in fall-back model.<br>
> I only can work with the nVidia graphic card, but the nouveau driver<br>
> doesn't work on it.<br>
> I don't know what's the matter, I search the fedoraforum, someone<br>
> has the same problem with me.<br>
> <a href="http://forums.fedoraforum.org/showthread.php?t=271191" target="_blank">http://forums.fedoraforum.org/showthread.php?t=271191</a><br>
> <a href="http://forums.fedoraforum.org/showthread.php?t=271148" target="_blank">http://forums.fedoraforum.org/showthread.php?t=271148</a><br>
><br>
> I love fedora very much, can anyone give me some help!<br>
><br>
> Thank you!<br>
<br>
if you're using the nvidia proprietary driver (it sounds like you are,<br>
but i'm not totally sure) try booting with 'enforcing=0'.<br>
--<br>
Adam Williamson<br>
Fedora QA Community Monkey<br>
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<br>
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</blockquote></div>