Date: Thu, 10 Jan 2019 18:40:31 +0000 From: Johannes Lundberg <johalun0@gmail.com> To: Greg V <greg@unrelenting.technology> Cc: Christian Weisgerber <naddy@mips.inka.de>, freebsd-x11@freebsd.org Subject: Re: Intel modesetting and tearing Message-ID: <CAECmPws7LMUZDHGP6VJJhm-XNXSE8hqbdyYDB4frVd_98rS2Nw@mail.gmail.com> In-Reply-To: <1547145358.4829.0@smtp.migadu.com> References: <slrnq3eqtu.m3o.naddy@lorvorc.mips.inka.de> <CAECmPwvmTzaYO=9_mokOc6nebD1z-VEsyUHpsJE1dwkB%2BsM6aA@mail.gmail.com> <1547145358.4829.0@smtp.migadu.com>
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On Thu, Jan 10, 2019 at 18:35 Greg V <greg@unrelenting.technology> wrote: > > > On Thu, Jan 10, 2019 at 9:22 PM, Johannes Lundberg <johalun0@gmail.com> > wrote: > > On Thu, Jan 10, 2019 at 16:03 Christian Weisgerber > > <naddy@mips.inka.de <mailto:naddy@mips.inka.de>> > > wrote: > > > >> I recently switched from an obsolescent Radeon card to the built-in > >> Intel HD Graphics P4600 with i915kms.ko and the modesetting driver. > >> That works fine, but there is very noticeable tearing whenever > >> something moves on-screen. If you google for it, you'll find plenty > >> of complaints on Linux, so this is not a FreeBSD issue. > >> > >> For MPlayer, replacing the default Xvideo with GL video output (-vo > >> gl) > >> eliminates tearing. > >> > >> And as I found out just today and quite by accident, in Firefox > >> toggling layers.acceleration.force-enabled to true will also > >> eliminate > >> all tearing, whether from soft-scrolling or when playing YouTube > >> videos. Hallelujah! > > > > > > Woot?! You mean I can use modesetting AND have tearfree Firefox? > > Thanks for > > the tip!! I will use this until I switch i3 -> Sway. > > When I still used X on my Intel laptop (of course with the modesetting > DDX), I don't think GL acceleration of Firefox helped with tearing. (I > always used GL accelerated Firefox anyway.) > > The solution was fiddling with compton flags, IIRC '--backend glx > --vsync opengl-swc' was enough for the Intel GPU What resolution? It=E2=80=99s less noticeable on smaller screens but on 4K@= 60Hz it=E2=80=99s quite severe and no Compton settings help. I tried them all. O= r maybe you mean Compton in combination GL in Firefox? > > >
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