From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from outgoing.mit.edu (outgoing-auth-1.mit.edu [18.9.28.11]) (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 9CE4C1E515 for ; Sat, 31 May 2025 23:16:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=18.9.28.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748733404; cv=none; b=N/mAWB1i2hUMpM6qqPw0MpLIpHifDDRoCBkj0blfZNqMMcSYCt69EKtiBtu5PnCgkbYnixtlgOLnltR+3m6NIilEGE1kD37binnso/REIpghpFW5MLCBlic6cEqK5W3cXPAkVAw4C3EwApBBPfe0OHafWfcpDFpB2wvHMVH0LSY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748733404; c=relaxed/simple; bh=8kFlhuISM7zo7MviDnDMsnib+80szu9BfqYsdPpl+XA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Om1Xil6QxAwCbUuRMmbLoQYrHNSLdJOXygd9VdEB8bxi/9cNu6FuttzSouu9Rp2c40QCTPrv7Lmx34kpcFQnBijMzZViVaAaTzjg47VdoscLryUMRfjC0iHpNd6fp2FsXzPEbhY2q2jPHdCe0aqqVo+25ZwhIAIrTwGh+u1e4hI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mit.edu; spf=pass smtp.mailfrom=mit.edu; arc=none smtp.client-ip=18.9.28.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mit.edu Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mit.edu Received: from macsyma.thunk.org ([65.217.157.154]) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 54VNGRYc013508 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 31 May 2025 19:16:27 -0400 Received: by macsyma.thunk.org (Postfix, from userid 15806) id 368C4340D66; Sat, 31 May 2025 19:16:26 -0400 (EDT) Date: Sat, 31 May 2025 19:16:26 -0400 From: "Theodore Ts'o" To: Marc MERLIN Cc: linux-acpi@vger.kernel.org Subject: Re: s2idle on kdell xps 9730 does go to sleep but laptop is warm Message-ID: <20250531231626.GB179983@mit.edu> References: Precedence: bulk X-Mailing-List: linux-acpi@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 Sat, May 31, 2025 at 02:26:32PM -0700, Marc MERLIN wrote: > This is still a problem. Is there more info I can provide? For now it's > bad enough that I can't have the battery be in S3 sleep for 24H without > the batteries running out :-/ I believe what is going on is that on more modern systems, it relies on the OS's drivers to power done various peripherals (e.g., graphics, SSD's, etc.) and this is no longer being done by the low-level firmware. With Linux the CPU is put to sleep, but there's a lot more on a modern mainboard than just the CPU.... My solution, two tears ago, was to give up on my Dell XPS 13, and I switched to a M2 MacBook Air, and I run (arm64) Linux in a Parallels VM. Sigh.... - Ted