From mboxrd@z Thu Jan 1 00:00:00 1970 From: ebiederm@xmission.com (Eric W. Biederman) Subject: Re: [PATCH -mm] kexec jump -v9 Date: Tue, 18 Mar 2008 21:25:27 -0600 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: (Alan Stern's message of "Tue, 18 Mar 2008 22:33:31 -0400 (EDT)") List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.linux-foundation.org Errors-To: linux-pm-bounces@lists.linux-foundation.org To: Alan Stern Cc: nigel@nigel.suspend2.net, Kexec Mailing List , linux-kernel@vger.kernel.org, Andrew Morton , linux-pm@lists.linux-foundation.org, Vivek Goyal List-Id: linux-pm@vger.kernel.org Alan Stern writes: > On Wed, 19 Mar 2008, Rafael J. Wysocki wrote: > >> Well, I've been saying that for I-don't-remember-how-long: on my box, if you >> use S5 instead of entering S4, the fan doesn't work correctly after the >> resume. Plain and simple. >> >> Perhaps there's a problem with our ACPI drivers that causes this to happen, >> but I have no idea what that can be at the moment. > > IMO it would be worthwhile to track this down. It's a clear indication > that something is wrong somewhere. > > Could it be connected with the way the boot kernel hands control over > to the image kernel? Presumably ACPI isn't prepared to deal with that > sort of thing during a boot from S5. It would have to be fooled into > thinking the two kernels were one and the same. It should be easy to test if it is a hand over problem, by turning off the laptop by placing it in S5 (shutdown -h now) and then booting same kernel again. Eric