22 Nov
2011
22 Nov
'11
8:51 p.m.
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