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From:
Stefan Sperling <stsp@stsp.name>
Subject:
Re: tearfree modesetting
To:
Matthieu Herrb <matthieu@openbsd.org>
Cc:
Theo Buehler <tb@theobuehler.org>, Ted Unangst <tedu@tedunangst.com>, tech@openbsd.org
Date:
Sat, 7 Jun 2025 10:20:31 +0200

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On Sat, Jun 07, 2025 at 09:29:48AM +0200, Matthieu Herrb wrote:
> On Fri, Jun 06, 2025 at 05:11:50AM +0200, Theo Buehler wrote:
> > On Thu, Jun 05, 2025 at 11:01:55PM -0400, Ted Unangst wrote:
> > > This backports the x.org modesetting driver to get the tearfree option.
> > > (On by default.) This makes scrolling much more enjoyable.
> > > 
> > > I don't know what the x.org release cycle is, but this code has been
> > > sitting upstream for years without making it into a released version.
> > > 
> > > I wanted it, so here it is.
> > 
> > This is pretty similar but not identical to naddy's patch from a few
> > months ago. It would be really nice to have it:
> > 
> > https://marc.info/?l=openbsd-tech&m=174118941524729&w=2
> > 
> 
> Hmm yes. With the current event in X.Org, a new release of the Xserver
> main branch looks less and less likely in a foreseable future. I've
> not had time to test the patches, but I'm ok on the principle.

I've been running with tearfree modesetting on inteldrm and amdgpu machines
ever since the first patch was posted by jcs@. Never seen any issues.