From mboxrd@z Thu Jan 1 00:00:00 1970 From: Damian Dominik Martinez Dreyer Subject: Potential BUG in drm/i915/execlists: Reset RING registers upon resume Date: Mon, 13 Mar 2017 23:23:55 +0100 Message-ID: <1489443835.5568.7.camel@mailbox.org> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0781873366==" Return-path: Received: from mx1.mailbox.org (mx1.mailbox.org [80.241.60.212]) by gabe.freedesktop.org (Postfix) with ESMTPS id 18CDE6E60A for ; Mon, 13 Mar 2017 22:32:08 +0000 (UTC) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: Chris Wilson , Joonas Lahtinen , Eric Blau , Greg Kroah-Hartman Cc: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org --===============0781873366== Content-Type: multipart/signed; micalg="pgp-sha512"; protocol="application/pgp-signature"; boundary="=-t7ZswdeUw0zmOaeJhr36" --=-t7ZswdeUw0zmOaeJhr36 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable I am writing regarding this kernel patch: https://git.kernel.org/pub/sc m/linux/kernel/git/stable/stable-queue.git/tree/releases/4.9.9/drm- i915-execlists-reset-ring-registers-upon-resume.patch . I have identified this by bisect to be the cause of a suspend and resume issue. Please see https://github.com/kxv/linux49.9 for the bisect history. After this change, a Laptop (HP Spectre x360) with Intel HD Graphics 520 will wake up from suspend to a blank screen. Please also see this thread on the manjaro linux forum: https://forum.m anjaro.org/t/linux-4-9-9-breaks-hibernation-4-9-8-works/17499 . Best regards Damian Dominik Martinez Dreyer --=-t7ZswdeUw0zmOaeJhr36 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQw7SCwsePXPdU4yjb47ihjpnTYmQUCWMcb+wAKCRD47ihjpnTY mSxqAP0QxHIrtMk9gWylB1E8nwwujuCjGL0XLp8wsR+1anE2lwEAqmgSalOMk0a1 R1An5w3mOMTnRuooda3lwPp0M/H8/QE= =eo9g -----END PGP SIGNATURE----- --=-t7ZswdeUw0zmOaeJhr36-- --===============0781873366== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KSW50ZWwtZ2Z4 IG1haWxpbmcgbGlzdApJbnRlbC1nZnhAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlz dHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vaW50ZWwtZ2Z4Cg== --===============0781873366==--