From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0BD7DC433FE for ; Tue, 4 Oct 2022 13:01:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230252AbiJDNBO (ORCPT ); Tue, 4 Oct 2022 09:01:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46554 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229715AbiJDNAp (ORCPT ); Tue, 4 Oct 2022 09:00:45 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4A81132EC9 for ; Tue, 4 Oct 2022 05:57:42 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id B5C3661359 for ; Tue, 4 Oct 2022 12:57:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B6609C433C1; Tue, 4 Oct 2022 12:57:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1664888261; bh=XRLrVe5FJar3hOcKdcXWyUQ7ioExsUqdkDWT0AfgXNg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=L4OFRMF1m494hA11aDNKzQ5N3AIv1bvpyxFL244PWvWubrISXZKvurzFTTRyWgoGB G9vg6HoyBL/Fm8E3+GHQ7xgFkoh/FQ283kG608TG2cqraJFPz+M/2neVAZ59V4fPs8 MwHMvmJE+lDEbMBU5rCWh913MSzPXTCJ8eRYnRM4= Date: Tue, 4 Oct 2022 14:57:38 +0200 From: Greg Kroah-Hartman To: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Cc: Thorsten Leemhuis , stable@vger.kernel.org, regressions@lists.linux.dev, Slade Watkins , Jerry Ling , intel-gfx@lists.freedesktop.org, David Matthew Mattli Subject: Re: Regression on 5.19.12, display flickering on Framework laptop Message-ID: References: <55905860-adf9-312c-69cc-491ac8ce1a8b@cern.ch> <03147889-B21C-449B-B110-7E504C8B0EF4@sladewatkins.net> <714903fa-16c8-4247-d69d-74af6ef50bfa@leemhuis.info> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Tue, Oct 04, 2022 at 03:35:44PM +0300, Ville Syrjälä wrote: > On Mon, Oct 03, 2022 at 08:28:50PM +0200, Thorsten Leemhuis wrote: > > > > > > On 03.10.22 19:48, Ville Syrjälä wrote: > > > On Mon, Oct 03, 2022 at 08:45:18PM +0300, Ville Syrjälä wrote: > > >> On Sat, Oct 01, 2022 at 12:07:39PM +0200, Thorsten Leemhuis wrote: > > >>> On 30.09.22 14:26, Jerry Ling wrote: > > >>>> > > >>>> looks like someone has done it: > > >>>> https://bbs.archlinux.org/viewtopic.php?pid=2059823#p2059823 > > >>>> > > >>>> and the bisect points to: > > >>>> > > >>>> |# first bad commit: [fc6aff984b1c63d6b9e54f5eff9cc5ac5840bc8c] > > >>>> drm/i915/bios: Split VBT data into per-panel vs. global parts Best, Jerry | > > >>> > > >>> FWIW, that's 3cf050762534 in mainline. Adding Ville, its author to the > > >>> list of recipients. > > >> > > >> I definitely had no plans to backport any of that stuff, > > >> but I guess the automagics did it anyway. > > >> > > >> Looks like stable is at least missing this pile of stuff: > > >> 50759c13735d drm/i915/pps: Keep VDD enabled during eDP probe > > >> 67090801489d drm/i915/pps: Reinit PPS delays after VBT has been fully parsed > > >> 8e75e8f573e1 drm/i915/pps: Split PPS init+sanitize in two > > >> 586294c3c186 drm/i915/pps: Stash away original BIOS programmed PPS delays > > >> 89fcdf430599 drm/i915/pps: Don't apply quirks/etc. to the VBT PPS delays if they haven't been initialized > > >> 60b02a09598f drm/i915/pps: Introduce pps_delays_valid() > > >> > > >> But dunno if even that is enough. > > > > If you need testers: David (now CCed) apparently has a affected machine > > and offered to test patches in a different subthread of this thread. > > > > >> This bug report is probably the same thing: > > >> https://gitlab.freedesktop.org/drm/intel/-/issues/7013 > > > > Sounds like it. > > > > > Also cc intel-gfx... > > > > Ahh, sorry, should have done that when I CCed you. > > After looking at some logs we do end up with potentially bogus > panel power sequencing delays, which may harm the LCD panel. > > > Greg, I recommend immediate revert of this stuff, and new stable > release ASAP. Plus a recommendation that no one using laptops > with Intel GPUs run 5.19.12. Ok, will do, I'll go do that right now, thanks and sorry for the problems. greg k-h