From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: 2.6.27-rc0 Power Bugs with HP/Compaq Laptops Date: Mon, 11 Aug 2008 19:18:49 +0200 Message-ID: <20080811171849.GN4524@elte.hu> References: <680ad8bc0808070757u49e13b3br1f69fb4881dc44ce@mail.gmail.com> <200808072300.21771.rjw@sisk.pl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mx3.mail.elte.hu ([157.181.1.138]:44898 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751498AbYHKRTN (ORCPT ); Mon, 11 Aug 2008 13:19:13 -0400 Content-Disposition: inline In-Reply-To: <200808072300.21771.rjw@sisk.pl> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Rafael J. Wysocki" Cc: Matt Parnell , linux-kernel@vger.kernel.org, ACPI Devel Maling List , pm list , Thomas Gleixner , "H. Peter Anvin" > > "This is not the right fix. Instead, HPET should be used as a timer > > source for dynticks. This is not in 2.6.26, but I tried the > > linux-next tree (google it) and it looked like dynticks worked fine, > > without disabling C1E. Can't place my finger on the exact commit, > > but you could check." Would be nice to figure out which exact change solves the problem, so that we could fast-route it into v2.6.27. (and for eventual .26 and .25 backporting, if it's simple enough) first thing would be to check whether tip/master works fine: http://people.redhat.com/mingo/tip.git/README if that works fine it would be nice to check whether the pending changes in tip/timers/hpet solves this particular issue. That can be done by: git-checkout -b tmp.test tip/timers/hpet [ once you have set up tip as a remote repository, as described in the README above. ] If tip/timers/hpet solves the problem then it's one of these five commits that solves it: f92a789: hpet: /dev/hpet - fixes and cleanup, fix 64a76f6: hpet: /dev/hpet - fixes and cleanup f356181: x86: add PCI ID for 6300ESB force hpet 3243b4e: x86: add another PCI ID for ICH6 force-hpet 70ef6d5: x86: get irq for hpet timer Ingo