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Date: Thu, 14 Jan 2010 23:25:57 +0200 From: Pekka Enberg <penberg@...helsinki.fi> To: Jesse Barnes <jbarnes@...tuousgeek.org> Cc: Nick Bowler <nbowler@...iptictech.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, airlied@...ux.ie, eric@...olt.net, intel-gfx@...ts.freedesktop.org Subject: Re: [PATCH] drm/i915: disable LVDS downclock by default Hi Jesse, On Thu, Jan 14, 2010 at 10:48 PM, Jesse Barnes <jbarnes@...tuousgeek.org> wrote: > Many platform support this feature, and it can provide significant > power savings when the reduced refresh rate is low. However, on some > platforms a secondary (reduced) timing is provided but not actually > supported by the hardware. This results in undesirable flicker at > runtime. > > So disable the feature by default, but allow users to opt-in to the > reduced clock behavior with a new module parameter, lvds_downclock, > that can be set to 1 to enable the feature. > > Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org> > > -- > > Nick and Pekka, please try this out and reply with your Tested-by > (assuming it works, if not I'll fix it up). This gives me pretty much identical results as your original patch. That is, the "shakes" are gone but I still see the occasional "flash". Should I give Nick's patch a try to see if we're looking at the same issue or wait for your new patch? Pekka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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