From owner-freebsd-amd64@FreeBSD.ORG Sun Sep 9 20:30:09 2012 Return-Path: Delivered-To: freebsd-amd64@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 211FD1065672 for ; Sun, 9 Sep 2012 20:30:09 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 1ABEB8FC0C for ; Sun, 9 Sep 2012 20:30:07 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.5/8.14.5) with ESMTP id q89KU69w017463 for ; Sun, 9 Sep 2012 20:30:06 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.5/8.14.5/Submit) id q89KU6P0017447; Sun, 9 Sep 2012 20:30:06 GMT (envelope-from gnats) Date: Sun, 9 Sep 2012 20:30:06 GMT Message-Id: <201209092030.q89KU6P0017447@freefall.freebsd.org> To: freebsd-amd64@FreeBSD.org From: Alexander Motin Cc: Subject: Re: amd64/171355: FreeBSD 9.1rc1 (and 10-HEAD) not booting on HP Pavilion g6 2147sl X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Alexander Motin List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 Sep 2012 20:30:09 -0000 The following reply was made to PR amd64/171355; it has been noted by GNATS. From: Alexander Motin To: Stefano Marinelli Cc: attilio@freebsd.org, bug-followup@FreeBSD.org Subject: Re: amd64/171355: FreeBSD 9.1rc1 (and 10-HEAD) not booting on HP Pavilion g6 2147sl Date: Sun, 09 Sep 2012 23:22:39 +0300 On 09.09.2012 23:17, Stefano Marinelli wrote: >> There could be other factors except CPU. For example, GPU, screen backlight, disks, etc. Without having proper video driver for AMD GPUs it is difficult to predict its power consumption. Also you may look on this page: http://wiki.freebsd.org/TuningPowerConsumption . It was written some time ago and mostly for Intel, but hopefully better then nothing. Unluckily I have no experience with AMD laptops. > > Actually I think it's a matter of GPU. On Linux, I can use the proprietary drivers. On (PC|Free)BSD, I am using the VESA XOrg driver. > The link you gave me allowed me, some time ago, to lower my netbook power consumption, going even lower than Linux. > > The machine is compiling the patched kernel now. I will try to reboot it as soon as finished. That patch should just block HPET to allow booting without tunables. Thanks for testing the patch, but that is not so interesting from practical side. What I would try to do after that is switch HPET into legacy_route mode that was known to work on previous AMDs: hint.hpet.0.legacy_route=1 hint.attimer.0.clock=0 hint.atrtc.0.clock=0 AFAIK, that is what Linux uses by default when it uses HPET. -- Alexander Motin