From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753915Ab1LUSyt (ORCPT ); Wed, 21 Dec 2011 13:54:49 -0500 Received: from os.inf.tu-dresden.de ([141.76.48.99]:56109 "EHLO os.inf.tu-dresden.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752317Ab1LUSyq (ORCPT ); Wed, 21 Dec 2011 13:54:46 -0500 Date: Wed, 21 Dec 2011 19:54:10 +0100 From: Udo Steinberg To: intel-gfx@lists.freedesktop.org, Linux Kernel Mailing List , dri-devel@lists.freedesktop.org Subject: GPU hung with Linux-3.2-rc6 Message-ID: <20111221195410.5e4c065a@x220.fritz.box> X-Mailer: X-Mailer 5.0 Gold Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/=DvYb=bFa+Xjwb1H/S5kFtg"; protocol="application/pgp-signature" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Sig_/=DvYb=bFa+Xjwb1H/S5kFtg Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hi, With Linux-3.2-rc6 I'm frequently seeing GPU hangs when large amounts of text scroll in an xterm, such as when extracting a tar archive. Such as this one (note the timestamps): [22865.157750] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed= ... GPU hung [22865.157763] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ri= ng [22871.165992] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed= ... GPU hung [22871.166008] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ri= ng [22877.417902] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed= ... GPU hung [22877.417915] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ri= ng [22883.426132] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed= ... GPU hung [22883.426146] [drm:kick_ring] *ERROR* Kicking stuck semaphore on render ri= ng These hangs did not occur with Linux 3.1 or they were so infrequent that I didn't notice them. The machine is an x220 laptop with SNB CPU. The kernel command line contains: i915.i915_enable_rc6=3D1 i915.i915_enable_fbc=3D1 i915.lvds_downclock=3D1 Note that VT-d is enabled in the BIOS, but the kernel is compiled without IOMMU support. Because the IOMMU is not enabled, I'm inclined to think that this problem is not VT-d related. Cheers, - Udo --Sig_/=DvYb=bFa+Xjwb1H/S5kFtg Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEARECAAYFAk7yK1MACgkQnhRzXSM7nSmqTQCcDAuSgUe/HJwbdwxoZvJ+dPuy yf0An2xY3gA8pZBM+WCGwFxQZJMPqzV7 =Hyj2 -----END PGP SIGNATURE----- --Sig_/=DvYb=bFa+Xjwb1H/S5kFtg--