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 X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41741C433ED for ; Tue, 11 May 2021 12:56:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F24A8616E9 for ; Tue, 11 May 2021 12:56:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231592AbhEKM5v (ORCPT ); Tue, 11 May 2021 08:57:51 -0400 Received: from mga06.intel.com ([134.134.136.31]:14379 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230483AbhEKM5u (ORCPT ); Tue, 11 May 2021 08:57:50 -0400 IronPort-SDR: BqnuO4epzvQ8GCyO/XLfZObalOMJ3d282GVXWAxzfaQjPf0gL693Eu1S9B6989ovHC/ECUcfwG BfIxzi5hd9Uw== X-IronPort-AV: E=McAfee;i="6200,9189,9980"; a="260694306" X-IronPort-AV: E=Sophos;i="5.82,290,1613462400"; d="scan'208";a="260694306" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 May 2021 05:56:43 -0700 IronPort-SDR: IuvjxKpluZHPFjuGczJEoD1k9qODbiH+ABvlrtGiH2pVsKJE6vXYYbNegVxKMCJ5BG5C8IMbnS OCcX0gi53Rhg== X-IronPort-AV: E=Sophos;i="5.82,290,1613462400"; d="scan'208";a="434433649" Received: from ialvarez-mobl1.ger.corp.intel.com (HELO localhost) ([10.249.32.67]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 May 2021 05:56:40 -0700 From: Jani Nikula To: Paul Zimmerman , Timo Aaltonen Cc: Joonas Lahtinen , Rodrigo Vivi , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: Re: [Intel-gfx] [PATCH RFC] Revert "drm/i915: Try to use fast+narrow link on eDP again and fall back to the old max strategy on failure" In-Reply-To: <87a6p1v39b.fsf@intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20210509044330.4655-1-pauldzim@gmail.com> <02957632-b050-f9eb-fcd8-75db9c92b8e0@ubuntu.com> <87a6p1v39b.fsf@intel.com> Date: Tue, 11 May 2021 15:56:38 +0300 Message-ID: <877dk5v37d.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 11 May 2021, Jani Nikula wrote: > On Mon, 10 May 2021, Paul Zimmerman wrote: >> On Mon, May 10, 2021 at 7:00 AM Timo Aaltonen wrote: >>> >>> On 9.5.2021 7.43, Paul Zimmerman wrote: >>> > This reverts commit 2bbd6dba84d44219387df051a1c799b7bac46099. >>> > >>> > Since 5.12-rc2, my Dell XPS-15 laptop has had a blank screen on boot. >>> > The system seems to run fine other than having no display, I am able >>> > to ssh into the machine. I don't see anything interesting in the dmesg >>> > log. I bisected the problem down to this commit, and reverting it fixes >>> > the problem. >>> >>> Have you tried with drm-tip? It has acca7762eb71bc0 which hopefully >>> helps here. >> >> I picked that one commit from the drm-tip tree (wasn't sure how to merge >> the entire tree into the kernel) and can confirm that it does fix the problem. >> Thank you! I hope the fix will be sent to Linus pretty soon, and it will need >> backporting to the 5.12 kernel as well. > > I've picked up 2bbd6dba84d4 ("drm/i915: Try to use fast+narrow link on > eDP again and fall back to the old max strategy on failure") to > drm-intel-fixes, and it should find itself in v5.13-rc2 and subsequently > v5.12 stable in the coming weeks. I mean I've picked up acca7762eb71 ("drm/i915/dp: Use slow and wide link training for everything"). > > BR, > Jani. -- Jani Nikula, Intel Open Source Graphics Center