From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keith Packard Subject: Re: [PATCH] Dont use hardware acceleration on Sandybridge rev 07 hardware or earlier. Date: Sat, 20 Nov 2010 19:59:34 -0800 Message-ID: References: <1290137397-10786-1-git-send-email-mhopf@suse.de> <20101120151740.GA16296@suse.de> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0450953707==" Return-path: Received: from keithp.com (home.keithp.com [63.227.221.253]) by gabe.freedesktop.org (Postfix) with ESMTP id 8FBBA9E815 for ; Sat, 20 Nov 2010 19:59:38 -0800 (PST) In-Reply-To: <20101120151740.GA16296@suse.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Matthias Hopf , Chris Wilson Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org --===============0450953707== Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha1; protocol="application/pgp-signature" --=-=-= Content-Transfer-Encoding: quoted-printable On Sat, 20 Nov 2010 16:17:40 +0100, Matthias Hopf wrote: > I know, I know. The patch is (one of) the results of the Novell-HP-Intel > workshop in Taipei this week. It turned out that rev07 is too unstable. > Keith and Eric can probably comment on this. Better than I can. There's a work-around in the kernel for pre rev-8 hardware that ensures every time the blt ring is advanced by the CPU, the first command executes a batch buffer. So the hardware is obviously quite broken. This workaround doesn't work perfectly, and the GPU will still lock up when executing commands out of the blt ring from time to time. As pre rev-8 hardware is all pre-production, the workarounds should be removed From=20the driver and all acceleration disabled. =2D-=20 keith.packard@intel.com --=-=-= Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iD8DBQFM6JkmQp8BWwlsTdMRAmijAJ4lK1t2U7vFuZS1dqiWpxYVNQOp4QCg4bx8 cUjoKIGZYji9VejGKSIBbJ4= =s3cU -----END PGP SIGNATURE----- --=-=-=-- --===============0450953707== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx --===============0450953707==--