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=-2.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 78990C433ED for ; Mon, 10 May 2021 20:50:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 44C87613EE for ; Mon, 10 May 2021 20:50:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232577AbhEJUvS (ORCPT ); Mon, 10 May 2021 16:51:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36688 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231672AbhEJUvN (ORCPT ); Mon, 10 May 2021 16:51:13 -0400 Received: from mail-il1-x12a.google.com (mail-il1-x12a.google.com [IPv6:2607:f8b0:4864:20::12a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5DFF7C061574 for ; Mon, 10 May 2021 13:50:08 -0700 (PDT) Received: by mail-il1-x12a.google.com with SMTP id m7so5942952ilg.9 for ; Mon, 10 May 2021 13:50:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=+OPH32eMyvWVljUKupcgNYrsp+22kITMh1bNgQuNG54=; b=Mxjxihzh//9zKcu9Ei/s7qpprfPr0u6IWd/fzG/27jG6O59oV+tfK4/196kyU31Vcl 3nSGBuQQvB66D/v7ppQcnRoAsabD/OhMkAkCh9ev8A3nkJhVCwYlm39d7pXdJ264+48s +HI1esCqRgNIuzrxE1+BCB3zfAROJXA/dbOBX5dOQRzeucERNZzChMSkYmrAYgdJV24b utcpquXLHT6v5hQWpDg18BYyfonggHceKG03q6Q1vlyEC8O/L162JWQjgIYAyMfLqq6y tW224WjoE6dM9wXytcfyTASLjZ9+hpH4WSr7e84wm+je4DzjYy3EXHk+FC0BiZccNGNI ojIg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=+OPH32eMyvWVljUKupcgNYrsp+22kITMh1bNgQuNG54=; b=V+DqsjrBmQbOo8OW8gXQ4Z+769Rhzcye5haNqwDuV1sZR5LS/vxUjexS0Z7587InvH q7+BHHFzqbEPJriHCL6h3zifsdBGs8N58WEM9AKIbgDafx8IECgdYFRbiNEwQkET12J4 nbcBqOuv0hXrOkvTDwssfY/JUL7RiITTByLC++o0gfLQ5sCAY1rhSDvbQEZTs2vEYwEE zc8sjlu5GIq21hYhYVX75eo3P5hTdRru8u3d7baW+6xyI3rDZZCrgQ7+00ZSE7cLczCg Xx9uxpFDWK+cWLn/PRHv9VOnjbOhUNt0Uuv4l45E/km5Qz58hj8f+uNg0c58sEuXxLg/ a7Pg== X-Gm-Message-State: AOAM531neoe4m1tljwZLYLMvyiSSUow0UwNWIJma09xFJWpzSALOPk8C 0XOta7Xgn/7jnwjOBgOw6+n1eRYWALZf5HDRAlU= X-Google-Smtp-Source: ABdhPJxECFuCLykYB7YKe0je6q9qiM93rrTQq38VoIiZuQvsqL5p9dNor139YkV9lGC/+C8bXFsEpZBY1+j4DckipRU= X-Received: by 2002:a92:d3c4:: with SMTP id c4mr21581909ilh.50.1620679807782; Mon, 10 May 2021 13:50:07 -0700 (PDT) MIME-Version: 1.0 References: <20210509044330.4655-1-pauldzim@gmail.com> <02957632-b050-f9eb-fcd8-75db9c92b8e0@ubuntu.com> In-Reply-To: <02957632-b050-f9eb-fcd8-75db9c92b8e0@ubuntu.com> From: Paul Zimmerman Date: Mon, 10 May 2021 13:49:42 -0700 Message-ID: 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" To: Timo Aaltonen Cc: Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. - Paul