From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zhenyu Wang Subject: Re: 2.6.33 regression for intel hd in dell e6510, e6410 and possibly thinkpad x200s Date: Mon, 24 May 2010 10:32:33 +0800 Message-ID: <20100524023233.GB29556@zhen-devel.sh.intel.com> References: <4BF8FF50.8030007@email.de> Reply-To: Zhenyu Wang Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0655162465==" Return-path: Received: from fmsmga101.fm.intel.com (mga05.intel.com [192.55.52.89]) by gabe.freedesktop.org (Postfix) with ESMTP id 59D409E796 for ; Sun, 23 May 2010 19:32:35 -0700 (PDT) In-Reply-To: <4BF8FF50.8030007@email.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Mime-version: 1.0 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: Johannes Schauer Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org --===============0655162465== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="H1spWtNR+x+ondvy" Content-Disposition: inline --H1spWtNR+x+ondvy Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2010.05.23 12:11:28 +0200, Johannes Schauer wrote: > hi! >=20 > on newer kernels, whenever i modprobe i915 my screen goes black. the > backlight is still on and the machine continues working but now as a > headless system. >=20 > by bisection i found the commit that introduced this regression: >=20 > 885a5fb5b120a5c7e0b3baad7b0feb5a89f76c18 is the first bad commit > commit 885a5fb5b120a5c7e0b3baad7b0feb5a89f76c18 > Author: Zhenyu Wang > Date: Tue Jan 12 05:38:31 2010 +0800 >=20 > drm/i915: fix pixel color depth setting on eDP >=20 > Original DP mode_valid check didn't take pixel color depth into accou= nt, > which made one 1600x900 eDP panel's mode check invalid because of > overclock, > but actually this 6bpc panel does can work with x1 lane at 2.7G. > This one > trys to take bpp value properly both in mode validation and mode > setting. >=20 > Signed-off-by: Zhenyu Wang > Signed-off-by: Eric Anholt >=20 > :040000 040000 3c99ae05b82db5b8e453d2062bcf56743794476b > d7e0aa843fe4f8173f624572c77a7fe93b6fc455 M drivers >=20 >=20 > this issue appears on my dell e6510 with intel hd (arrandale) and one > can find many bugreports about the same effect on the e6410 and thinkpad > x200s - all using said platform: >=20 > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554569 > https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/561802 >=20 > i also can confirm, that when removing the changes from this commit in > the most recent intel_dp.c then my display even works on 2.6.34 :) >=20 Can you send me kernel boot dmesg with drm.debug=3D7, intel_reg_dump and VBIOS image dump? Better if you could file a new bug to fd.o, in case your eDP panel issue is different from #28070. --=20 Open Source Technology Center, Intel ltd. $gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827 --H1spWtNR+x+ondvy Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAkv55UEACgkQsQQaM014GCdCeQCfQ11DSNLZluPw3VVFgRv/D0JQ /WcAn2026HNbHp9nCXFqslHcKMAF/L7W =LzHH -----END PGP SIGNATURE----- --H1spWtNR+x+ondvy-- --===============0655162465== 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 --===============0655162465==--