<div class="gmail_quote">On Tue, Nov 22, 2011 at 18:15, Matthew Garrett <span dir="ltr"><<a href="mailto:mjg@redhat.com">mjg@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">On Fri, Nov 18, 2011 at 10:41:29PM -0800, Keith Packard wrote:<br>
<br>
> + /*<br>
> + * Only enable RC6 if all dma remapping is disabled, or if<br>
> + * there's no iommu present in the machine.<br>
> + */<br>
> + if (INTEL_INFO(dev)->gen == 6)<br>
> + return no_iommu || dmar_disabled;<br>
<br>
</div>So the user has to choose between 5W of power saving or having dmar? And<br>
we default to giving them dmar?</blockquote><div><br>From the latest investigations, it is either this, or random gpu hangs and crashes when both are enabled :(.<br><br>When the root cause will be discovered, we should allow both of course. But so far, all the attempts on this weren't successful.<br clear="all">
</div></div><br>-- <br>Eugeni Dodonov<a href="http://eugeni.dodonov.net/" target="_blank"><br></a><br>