From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailout2.hostsharing.net (mailout2.hostsharing.net [83.223.78.233]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C89833D1CD7; Tue, 6 Oct 2026 21:28:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=83.223.78.233 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791322115; cv=none; b=ojfrpRCSk/b4WmvoGguSBZSJFoHenzH5drx5dOd9GrpvaE7Dfg/H6jS/Mi5yr9igkVQ+GAjNeQrDwq0m2qtvtsvsVS7LlbufsNHIYk7EFuSrqsrflkEIguIcLA+LzmuoF6K+zxDMBkH83qqMsbe37JDwAkSOMlOLIIqtBqLyx/w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791322115; c=relaxed/simple; bh=172AY1LtbJ9WzIpzs71jiNNlhd1CxbpWXlAYp+Gs8ss=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Bh4una6+yMGsWuX9n749nr31IQPqFrriMH/rRI7Qm92zSEtFq9qLYeLTRiWoFnlEAoNjtWqsHIG9iHai5AVXBkNSQgK/jjhSJGPsEy12FvyRZzM0EXjKTu4Km3QcOi4GxcZW7gcOyCkxC9u+zd3lGEPrgWOKTevF2kd6yaWAzhE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=wunner.de; spf=pass smtp.mailfrom=wunner.de; arc=none smtp.client-ip=83.223.78.233 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=wunner.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=wunner.de Received: from h08.hostsharing.net (h08.hostsharing.net [83.223.95.28]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384 client-signature ECDSA (secp384r1) client-digest SHA384) (Client CN "*.hostsharing.net", Issuer "GlobalSign GCC R6 AlphaSSL CA 2025" (verified OK)) by mailout2.hostsharing.net (Postfix) with ESMTPS id 05AA710606; Tue, 06 Oct 2026 23:19:11 +0200 (CEST) Received: by h08.hostsharing.net (Postfix, from userid 100393) id CEC7960F5533; Tue, 6 Oct 2026 23:19:10 +0200 (CEST) Date: Tue, 6 Oct 2026 23:19:10 +0200 From: Lukas Wunner To: Alex Deucher Cc: Bjorn Helgaas , "Perlow, Jason" , Bjorn Helgaas , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, regressions@lists.linux.dev, Aditya Garg Subject: Re: [REGRESSION] PCI/AER: MacBookPro16,1 powers off ~20 s after boot Message-ID: References: <20261005231914.GA639967@bhelgaas> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Tue, Oct 06, 2026 at 12:37:18PM -0400, Alex Deucher wrote: > On Mon, Oct 5, 2026 at 7:19 PM Bjorn Helgaas wrote: > > Alex reported something similar at > > https://bugzilla.kernel.org/show_bug.cgi?id=222095. > > Lukas' patches fixes some boards, but unfortunately, I'm still seeing > failures on others. Reverting the patch fixes those failures. I've > updated the ticket. I've added an analysis of the dmesg output as well as a patch. It looks like the BIOS is raising a false alarm in that it signals a Fatal Error even though the Uncorrectable Error Status register is blank. The patch causes such events to be reported, but otherwise ignored (i.e. no recovery is attempted for a false alarm). Newly enabled functionality like Advisory Non-Fatal Errors causes BIOS code paths to be exercised which likely haven't been tested by firmware validation folks, hence the fallout. However I believe ultimately we *want* to see those errors being reported because they may point to BIOS issues which flew under the radar so far. Thanks, Lukas