lkml.org 
[lkml]   [2011]   [Nov]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH] drm/i915: By default, enable RC6 on IVB and SNB when reasonable
    On Tue, Nov 22, 2011 at 06:46:21PM -0200, Eugeni Dodonov wrote:
    > On Tue, Nov 22, 2011 at 18:15, Matthew Garrett <mjg@redhat.com> wrote:
    >
    > > On Fri, Nov 18, 2011 at 10:41:29PM -0800, Keith Packard wrote:
    > >
    > > > + /*
    > > > + * Only enable RC6 if all dma remapping is disabled, or if
    > > > + * there's no iommu present in the machine.
    > > > + */
    > > > + if (INTEL_INFO(dev)->gen == 6)
    > > > + return no_iommu || dmar_disabled;
    > >
    > > So the user has to choose between 5W of power saving or having dmar? And
    > > we default to giving them dmar?
    >
    >
    > From the latest investigations, it is either this, or random gpu hangs and
    > crashes when both are enabled :(.

    So blacklist dmar on sandybridge. The power saving is going to be more
    important for most users.

    --
    Matthew Garrett | mjg59@srcf.ucam.org


    \
     
     \ /
      Last update: 2011-11-22 21:53    [W:0.020 / U:2.776 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site