From patchwork Thu Nov 21 12:26:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Pisati X-Patchwork-Id: 1198923 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.ubuntu.com (client-ip=91.189.94.19; helo=huckleberry.canonical.com; envelope-from=kernel-team-bounces@lists.ubuntu.com; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=canonical.com Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 47Jf1C3dBjz9sQy; Thu, 21 Nov 2019 23:26:07 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.86_2) (envelope-from ) id 1iXlXA-0007MQ-93; Thu, 21 Nov 2019 12:26:04 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1iXlX8-0007Ln-5V for kernel-team@lists.ubuntu.com; Thu, 21 Nov 2019 12:26:02 +0000 Received: from 1.general.ppisati.uk.vpn ([10.172.193.134] helo=canonical.com) by youngberry.canonical.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1iXlX7-0001P0-Ve for kernel-team@lists.ubuntu.com; Thu, 21 Nov 2019 12:26:02 +0000 From: Paolo Pisati To: kernel-team@lists.ubuntu.com Subject: [PATCH] [Focal/master] UBUNTU: [Config] FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER=y Date: Thu, 21 Nov 2019 13:26:01 +0100 Message-Id: <20191121122601.10817-1-paolo.pisati@canonical.com> X-Mailer: git-send-email 2.17.1 X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" BugLink: https://bugs.launchpad.net/bugs/1836858 Impact: Flickerfree boot doesn't work with Eoan and Focal kernels - the flicker occurs seemingly during kernel startup following this pattern: 1. BIOS logo on a black background 2. Display mode resets, no image on a black background briefly 3. BIOS logo on a black background According to upstream, the required kernel option to achieve it (coupled with the quiet cmdline) is FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER. Fix: Apply the config change, recompile and reboot - a test kernel was provided and the reporter of this bug said "it doesn't completely solve the issue, but it's a step in the right direction, so please enable it". Regression potential: Low, config change for an option that is upstream. Proposing for Focal. Signed-off-by: Paolo Pisati --- debian.master/config/config.common.ubuntu | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/debian.master/config/config.common.ubuntu b/debian.master/config/config.common.ubuntu index 5c54854e3e99..ff0ccc7af000 100644 --- a/debian.master/config/config.common.ubuntu +++ b/debian.master/config/config.common.ubuntu @@ -3309,7 +3309,7 @@ CONFIG_FPGA_MGR_XILINX_SPI=m CONFIG_FPGA_MGR_ZYNQMP_FPGA=m CONFIG_FPGA_REGION=m CONFIG_FRAMEBUFFER_CONSOLE=y -# CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER is not set +CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER=y CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y CONFIG_FRAME_POINTER=y