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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id B757DC433EF for ; Thu, 14 Apr 2022 08:31:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C59CD10F22C; Thu, 14 Apr 2022 08:31:39 +0000 (UTC) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id 57EAA10F22C; Thu, 14 Apr 2022 08:31:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1649925099; x=1681461099; h=from:to:cc:subject:in-reply-to:references:date: message-id:mime-version:content-transfer-encoding; bh=JuC6/H6wYY0xfsuqbeG2GcM324ZFmWIZku5BVG+l8BY=; b=Z3UtBTesoCt4a6DDV7a7IQdzCfmsuZ/di6e0OlOHnMu5emOzfvEZSTr6 PngztuTySKfQt0Om+giS5JJ8PIYw3SkghSBvHGiIE4zBrTY59wy5gsDPY tbxE4hqhasWL6vb3DE4O1hnvx2S8vc6NvQFEiuSRFRmXZXpyKoe3QTTex 30QtLfXGCBIYZ2MJ0Ts7QsbcNk6Tvv6N8HB8n9psqFn3hAgVfyb2D8e/5 udxwmuTgiGbYUbMQEgYrPlWgvTFvVyJmVSFi+4sEZXsMmQ5QNgwq6pb7/ xMfEW+lT257R5Ee23x3oDfioazgAZy6sm9F+LpDABcQ1BgTA6URhmtK2D g==; X-IronPort-AV: E=McAfee;i="6400,9594,10316"; a="250173987" X-IronPort-AV: E=Sophos;i="5.90,259,1643702400"; d="scan'208";a="250173987" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2022 01:31:38 -0700 X-IronPort-AV: E=Sophos;i="5.90,259,1643702400"; d="scan'208";a="725277009" Received: from nplaweck-mobl.ger.corp.intel.com (HELO localhost) ([10.249.149.236]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Apr 2022 01:31:36 -0700 From: Jani Nikula To: =?utf-8?Q?Fran=C3=A7ois?= Valenduc , "Lisovskiy, Stanislav" Subject: Re: commit 15512021eb3975a8c2366e3883337e252bb0eee5 causes white spots in console screens In-Reply-To: <1bcb195c-8c84-3641-7784-e7b7578bb40f@gmail.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <0da21aec-d299-1834-99f3-9a598e4649f7@gmail.com> <87v8vcgb63.fsf@intel.com> <20220414063139.GA31013@intel.com> <9d497fb9-4504-9e64-1d7f-9353cf96624c@gmail.com> <20220414080312.GA31389@intel.com> <1bcb195c-8c84-3641-7784-e7b7578bb40f@gmail.com> Date: Thu, 14 Apr 2022 11:31:36 +0300 Message-ID: <87h76wf4lz.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable 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: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Thu, 14 Apr 2022, Fran=C3=A7ois Valenduc wr= ote: > Le 14/04/22 =C3=A0 10:03, Lisovskiy, Stanislav a =C3=A9crit=C2=A0: >> On Thu, Apr 14, 2022 at 08:33:35AM +0200, Fran=C3=A7ois Valenduc wrote: >>> Le 14/04/22 =C3=A0 08:31, Lisovskiy, Stanislav a =C3=A9crit=C2=A0: >>>> On Wed, Apr 13, 2022 at 08:12:20PM +0300, Jani Nikula wrote: >>>>> On Wed, 13 Apr 2022, Fran=C3=A7ois Valenduc wrote: >>>>>> Commit 15512021eb3975a8c2366e3883337e252bb0eee5 >>>>>> (15512021eb3975a8c2366e3883337e252bb0eee5) causes a lof of white spo= ts >>>>>> to appears on the right upper corner of all console screens (see >>>>>> https://drive.google.com/file/d/13GabEvOIKSAj5yox6ybAZEDu3Ixncw5Q/vi= ew). >>>>>> git-bisect shows that this is the offending commit and if I revert i= t, >>>>>> the problem goes away. The problem still occurs with kernel 5.18-rc2= and >>>>>> to all stable trees where it was applied. >>>>>> Can somebody explains what happens ? >>>>>> >>>>>> The video card is the following: VGA compatible controller: Intel >>>>>> Corporation WhiskeyLake-U GT2 [UHD Graphics 620] (rev 02) (prog-if 00 >>>>>> [VGA controller]) >>>>>> >>>>>> Please tell me if you need more info. >>>>> That's commit 15512021eb39 ("drm/i915: Workaround broken BIOS DBUF >>>>> configuration on TGL/RKL"), adding Cc's. >>>>> >>>>> Please file a report at fdo gitlab [1] and attach dmesg etc. there. >>>> That commit looks like it is just disabling all the planes, if wrong >>>> dbuf/wm configuration is detected. >>>> However it should do that only once during boot as I understand. >>>> >>>> Are you sure that is exactly this commit which is causing this? >>>> Does the issue appear always? >>>> >>>> Ville Syrj=C3=A4l=C3=A4, thoughts? >>>> >>>> Stan >>>> >>>>> Thanks, >>>>> Jani. >>>>> >>>>> >>>>> [1] https://gitlab.freedesktop.org/drm/intel/wikis/How-to-file-i915-b= ugs >>>>> >>>>> >>>>> --=20 >>>>> Jani Nikula, Intel Open Source Graphics Center >>> As I said, git-bisect shows it's the offending commit and if I revert i= t, >>> the problem doesn't happens. Otherwise, it always occurs. >>> >>> Fran=C3=A7ois >>> >> Does it just happen all the time or some steps/certain circumstances nee= ded >> for it to happen? >> >> Only suspicion after looking briefly is that once suspend/resume is done >> it might be messing something up. Just a quick guess.. >> >> Stan > > It occurs permantently as soon as I boot my computer. I'd appreciate that bug being filed, and the discussion moved there, so all the details and history are in one place. Thanks, Jani. --=20 Jani Nikula, Intel Open Source Graphics Center