Re: Very bad performance from intel chipset on Thinkpad T540p (2880x1620)

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On Sat, Apr 25, 2015 at 11:31:57AM -0700, Marc MERLIN wrote:
> On Fri, Apr 24, 2015 at 04:53:53PM +0100, Chris Wilson wrote:
> > Whether of not it tears depends upon your window manager. On bare X,
> > using mplayer -vo xv or -vo gl, should not tear. Under a compositing
> > window manager, it depends upon how it decides to update the screen. To
> > force everything to update without tearing, use
> > 
> > echo > /etc/X11/xorg.conf.d/90-intel.conf <<EOF
> > Section "Device"
> > 	Identifier "igfx"
> > 	Option "TearFree"
> > EndSection
> > EOF
> 
> So, I added this at the end of my xorg.conf, but Xorg.0.log says:
> 'intel(0): TearFree disabled'

You created a second Device section for the option that didn't match the
first (which is used by default). So X is simply not using Option
"TearFree".

Note that your Xorg is recent enough for the existing xorg.conf to be
entirely superfluous.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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