From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark H Weaver Subject: Re: Xorg tearing fix on Intel HD Graphics 4000 Date: Wed, 21 Jun 2017 13:23:11 -0400 Message-ID: <87h8z9jlvk.fsf@netris.org> References: <877f053hc7.fsf@gnu.org> <87k24539rz.fsf@elephly.net> <87d19xwjxe.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:50577) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dNjLm-0006ZY-VG for guix-devel@gnu.org; Wed, 21 Jun 2017 13:23:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dNjLi-0004QX-NW for guix-devel@gnu.org; Wed, 21 Jun 2017 13:23:30 -0400 In-Reply-To: <87d19xwjxe.fsf@gnu.org> (Roel Janssen's message of "Wed, 21 Jun 2017 15:26:53 +0200") List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org Sender: "Guix-devel" To: Roel Janssen Cc: guix-devel Hi Roel, Roel Janssen writes: > Ricardo Wurmus writes: > >> Hi Roel, >> >>> With the following patch to the Xorg configuration file, I have a >>> tear-free GuixSD experience. I wonder if this is upstreameable in some >>> way. This patch is probably too broad in effect. Can I change it so >>> that only the graphics card I have will be affected by this patch? >> >> I=E2=80=99m not sure about this, but you can apply it only to your syste= m by >> changing the slim-service=E2=80=99s =E2=80=9Cstartx=E2=80=9D value like = this: >> >> --8<---------------cut here---------------start------------->8--- >> (modify-services %desktop-services >> (slim-service-type >> config =3D> (slim-configuration >> (inherit config) >> (startx (xorg-start-command >> #:configuration-file >> (xorg-configuration-file >> #:extra-config >> (list your-fix))))))) >> --8<---------------cut here---------------end--------------->8--- >> >> But I suppose what you want is to apply it unconditionally in Guix and >> have the X server ignore it for all but this one graphics card, right? > > No, not necessarily. I could no longer do 'guix pull && guix system > reconfigure ...', which I attempted to solve by upstreaming this patch. > > I wonder if anyone else is having the same problem on this hardware..=20= =20 I have the same problem on my Thinkpad X200. For me, it mostly only happens in Emacs graphical frames, and only within GNOME (and I suppose maybe other compositing window managers, though I haven't tried), but the problem for me is quite severe. I've resorted to running Emacs in text mode within GNOME Terminal, because otherwise I cannot trust my editing at all (e.g. I'm not sure if I'm deleting the messages that I intend to delete in Gnus). However, your proposed workaround is not a proper fix, and I don't think we should apply it system-wide in Guix. I don't think it would be accepted upstream. I think there's a real bug somewhere, most likely in Emacs itself, but possibly in the Intel graphics drivers. It's good to have the workaround though. I may apply it to my own system and see how it affects graphics performance. Thank you! Mark