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=-8.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 698E2C433B4 for ; Sat, 15 May 2021 13:35:20 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E491961186 for ; Sat, 15 May 2021 13:35:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E491961186 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=meine-oma.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D4EC96E3AC; Sat, 15 May 2021 13:35:18 +0000 (UTC) X-Greylist: delayed 1492 seconds by postgrey-1.36 at gabe; Fri, 14 May 2021 14:10:14 UTC Received: from mail.meine-oma.de (mail.meine-oma.de [88.99.114.13]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1B2286EE8F; Fri, 14 May 2021 14:10:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=meine-oma.de; s=x; h=Content-Transfer-Encoding:Content-Type:Message-ID: References:In-Reply-To:Subject:Cc:To:From:Date:MIME-Version:Sender:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=XGx/7rOKdm+joqcF3hvgoi0MjdueZKKpV0droN3qfrc=; b=bY8q2dllZqbldesadPpgsKWIfH xbtGRBjP6CzAQue5ebzXfhX2rpJ5KoKQrFyTKdRkq3/Yubcrdll1hDgcg7IaPAJxc4KyS0ZvtV8VS AyY3CnDdR/w2fQjksT6lyLDdqjd8nQ8y6znLuHNhbw+/vZhfcUOokGnPHjTe1slgQLno=; Received: from localhost ([127.0.0.1] helo=mail.meine-oma.de) by mail.meine-oma.de with esmtp (Exim 4.94.2) (envelope-from ) id 1lhY7X-0003ky-5M; Fri, 14 May 2021 15:44:51 +0200 MIME-Version: 1.0 Date: Fri, 14 May 2021 15:44:51 +0200 From: Thomas Stein To: Oleksandr Natalenko Subject: Re: thinkpad x1 carbon display flickering after update to 5.12. good on 5.11.x (i915) In-Reply-To: <20210514123431.fqvaa437zlw7rq7j@spock.localdomain> References: <1a6cf0a3dc8a2c6364265ad7249b76b1@meine-oma.de> <20210514123431.fqvaa437zlw7rq7j@spock.localdomain> Message-ID: X-Sender: himbeere@meine-oma.de Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit X-Mailman-Approved-At: Sat, 15 May 2021 13:35:18 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Airlie , Lucas De Marchi , linux-kernel@vger.kernel.org, Manasi Navare , Kai-Heng Feng , Sean Paul , dri-devel@lists.freedesktop.org, Rodrigo Vivi , Ankit Nautiyal , intel-gfx@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Yes, it does indeed! No flicker anymore. Thanks and cheers! On 2021-05-14 14:34, Oleksandr Natalenko wrote: > Hello. > > On Fri, May 14, 2021 at 10:24:26AM +0200, Thomas Stein wrote: >> After upgrading to linux 5.12 the display on my X1 Carbon Gen 2 starts >> to >> flicker. Well actually it seems to turn off and on again and again. >> Here a >> link to a video a person posted who has the same issue as me >> obviousely. >> https://linuxove.com/thinkpad-x1-carbon-gen-3-display-flickering-on-linux-kernel-5-12/ >> >> This happens without having Xorg running too. So it can't be related >> to >> Xorg. The kernel boots and after a few seconds, the kernel messages >> scoll >> through, the flickering starts. Nothing special in dmesg. >> >> dmesg: >> >> himbeere@rather ~ $ dmesg | grep i915 >> [ 0.713595] i915 0000:00:02.0: vgaarb: deactivate vga console >> [ 0.720280] i915 0000:00:02.0: vgaarb: changed VGA decodes: >> olddecodes=io+mem,decodes=io+mem:owns=io+mem >> [ 0.741494] i915 0000:00:02.0: [drm] Panel advertises DPCD >> backlight >> support, but VBT disagrees. If your backlight controls don't work try >> booting with i915.enable_dpcd_backlight=1. If your machine needs this, >> please file a _new_ bug report on drm/i915, see >> https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs >> for >> details. >> [ 1.864837] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 >> on >> minor 0 >> [ 1.875907] fbcon: i915drmfb (fb0) is primary device >> [ 3.158255] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer >> device >> himbeere@rather ~ $ >> >> Downgrading to 5.11 solves the issue for me. Any ideas? > > Does [1] fix your issue? > > [1] > https://cgit.freedesktop.org/drm-tip/patch/?id=acca7762eb71bc05a8f28d29320d193150051f79