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[209.132.180.67]) by mx.google.com with ESMTP id gz7si886235ejb.271.2019.10.30.03.30.48; Wed, 30 Oct 2019 03:31:12 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@endlessm-com.20150623.gappssmtp.com header.s=20150623 header.b=xdNyogpa; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726638AbfJ3K3j (ORCPT + 99 others); Wed, 30 Oct 2019 06:29:39 -0400 Received: from mail-qt1-f169.google.com ([209.85.160.169]:33287 "EHLO mail-qt1-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726046AbfJ3K3j (ORCPT ); Wed, 30 Oct 2019 06:29:39 -0400 Received: by mail-qt1-f169.google.com with SMTP id y39so2524937qty.0 for ; Wed, 30 Oct 2019 03:29:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=endlessm-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=czU7HzP6DFG+QGZIivdRBvNS5jNlduf8mAt1YzDvVTQ=; b=xdNyogpac3p0FXHke3oPRulvO/IxkuAWDR0O0Nne+5pOEOjBIxFW8YjEep/S/4uiob iBC+kiOv1hL6/bnDvQIEflQFK64XqzIjIdH9griQU8Rq+L7unmcwa17TOW9kj1iD6PDJ 9BGjVnYwQljoLGxHbv4bUS3CxH+WMBh43hXm2VpViujVyYhNhz948P3ey+0kCYwLbzlc SbeVKYj27oTxlHDZ69u/7RvKp9y2MVeXOLFVatbR57PIKOogDr3jLv8SCQX8rSFUXKA+ uuJHugeXxnLU6oX3fF2Nv7qC6caMQxUzBaMHAk1xLlfG8dHrG+spE8Fo1w0Wc9gOdUNJ GHow== 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=czU7HzP6DFG+QGZIivdRBvNS5jNlduf8mAt1YzDvVTQ=; b=QDUJDQuBtxnCKT4UH8I358ndA3mHM+xA+cUHjX6559XZj3ExY3TwwH1rthbOfSivb8 51kQ7hpIkY7J3fVrbBXiqus0sGOqpnbqaVrecudNjRmZVTcwCVImDeidLuFf1D0nOXeE Spi3kezE+vgcZvS6ajdQqyWcbaYJJQ0Bzhvi/alJqrQPfVCpXLHhXxjXrKvmMDMh0LYl wlS+jNHH68pisT5nBQpPHZ+lmJQJdNJ0sKanvkrjy/dzWETcpo7GnndPLAqCShzqHuyN C3KZ4o9a6976nprHUSC/KDbMM7PtK7Ci4uFKwvJspncVZ+0yifmE6klIKajueMUWI1dL RvSQ== X-Gm-Message-State: APjAAAVSZnDqFjEUuIIAiDYlfwRhs+Omytw7E55hFv+XqjcZ2GjaCiXd Dt0JRVAOCDNTjQoxTkRI+2iLzRoH68ziXW7uxfvd9A== X-Received: by 2002:ad4:43e5:: with SMTP id f5mr27717464qvu.37.1572431377931; Wed, 30 Oct 2019 03:29:37 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Chris Chiu Date: Wed, 30 Oct 2019 18:29:26 +0800 Message-ID: Subject: Re: Unexpected screen flicker during i915 initialization To: Jani Nikula , joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com, David Airlie , daniel@ffwll.ch, intel-gfx@lists.freedesktop.org, dri-devel Cc: Linux Kernel Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 30, 2019 at 6:25 PM Chris Chiu wrote: > > Hi guys, > We have 2 laptops, ASUS Z406MA and Acer TravelMate B118, both > powered by the same Intel N5000 GemniLake CPU. On the Acer laptop, the > panel will blink once during boot which never happens on the ASUS > laptop. It caught my attention and I find the difference between them > but I need help for more information, Sorry, I forgot to mention that the problem was reproduced on the latest kernel 5.3. Chris