From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 E7BFD389458; Fri, 9 Oct 2026 15:40:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791560432; cv=none; b=fBS5H/OpDyhdW+zkwsrdSkvSHJMXSrLCwcls+MiZ40iokhDxAGGVuurrmN6UXTzuuSL6aeFpPhoNNIAeunRkd2SU1lsetBZoT/fRhi5DmY+rJD2Kjd7YfRRYlVNl7A4KR1Tc1reev5FRg6hhcKtrpGHXGWzc2cFRSmsGCHTvNQ8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791560432; c=relaxed/simple; bh=ZfREm2ISmWYaR7bcpqTTUmxVi1WaVSmYCk0DF9W7ttM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=o635xroKvJn81X/eFUe1i/QZtcCl/EmJ9HROqL8TXza9+LIRhdheEJyeJCa6kKoY/kn8TT5ofBpsq8VOnLeyqwW86F2Bsl+lKPjJwgyjyN5Ly1DVRaVe7SQKfOuQNb++78BBvnZr+3wMAwgD7pCvK9NfgVoYVXT6WEyhMR4i4zQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=N9fmHlmJ; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="N9fmHlmJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 772331F000FF; Fri, 9 Oct 2026 15:40:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1791560431; bh=CoNSFUQzT9k/JCGCjNqp9pOy/DOt1JJtLGvf6kZ44WI=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=N9fmHlmJBIaBe2QSSLIc8bd3YL3eJi8UlmPfe0mUGKz/wbxLwvktMsFN8k89jkbYw Eeb91wzeeLUOsw92HZLsLT8CThjmEu7xaqIQOelYcqx7Hq7tLEaMv7Oz54ZAQbh9yl woxkSOm23XS5MRZIdeAwCd1s+gTqxxWDvo+cqS/7Ea8JZ3315L3fL6tqCLs3pbuL1A ckwlRxGfvFjNkfi6dybUoCVpNmtUOIiJERsd6PGEBn/deucp1zUlIBBVkvLisSwqXg Y3GnLnkjWG/tGyDfL2woN0BMuH3ozasS9mQ6ula4xXTJLvsrNIYstfuMOEzOQrstgq 7y8CpLdV9iFAw== Date: Fri, 9 Oct 2026 17:40:28 +0200 From: Niklas Cassel To: Damien Le Moal Cc: Hans-Joachim Lange , linux-ide@vger.kernel.org, regressions@lists.linux.dev Subject: Re: PROBLEM: Kernel 6.8.x: =?utf-8?Q?VFS?= =?utf-8?Q?=3A_Unable_to_mount_root_fs_on_unknown-block=280=2C0=29_?= =?utf-8?B?4oCT?= SATA (Intel AHCI) not detected Message-ID: References: <1b9f33d6-f887-432a-83ec-292ff43eccdd@kernel.org> Precedence: bulk X-Mailing-List: linux-ide@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1b9f33d6-f887-432a-83ec-292ff43eccdd@kernel.org> On Fri, Oct 09, 2026 at 09:33:42AM +0200, Damien Le Moal wrote: > On 2026/10/07 14:40, Hans-Joachim Lange wrote: > > Hello, > > > > I am experiencing a regression: kernel 5.15.x boots fine, but 6.8.x > > fails with "Kernel panic - not syncing: VFS: Unable to mount root fs > > on unknown-block(0,0)". The SATA controller (Intel, rev 06) is not > > detected; /dev/sda never appears. The ahci module is present in the > > initramfs but does not load. > > > > [1.] One line summary: > >     Kernel 6.8.x fails to detect Intel SATA AHCI controller; /dev/sda > > not created. > > Please try again with at least the latest stable kernel, or ideally the latest > mainline kernel (7.3-rc6 as of this week). And also please try to capture the > boot messages with the bad kernel. Hard to say what's happening without that. > You can use network console or simply a video/pictures of the screen where we > can see the ata messages. You can also add rdinit=/bin/sh to the kernel command line to get a shell. Then you can do: $ lspci to see if the AHCI controller is there. to see which modules are loaded. You can then try to modprobe ahci to see if your drives are detected. In most of these cases, you are simply missing the required filesystem (or similar) modules in your initramfs. Kind regards, Niklas