From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Frey Subject: Re: ACPI throttling to death? Date: Tue, 5 Apr 2005 18:13:28 +0200 Message-ID: <200504051813.28983.jfrey@gmx.de> References: <200504042214.15648.jfrey@gmx.de> <200504051638.22705.stefandoesinger@gmx.at> Reply-To: jfrey-Mmb7MZpHnFY@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <200504051638.22705.stefandoesinger-RbZlAiThDcE@public.gmane.org> Content-Disposition: inline Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Cc: Stefan =?iso-8859-1?q?D=F6singer?= List-Id: linux-acpi@vger.kernel.org On Tuesday 05 April 2005 18:38, Stefan D=F6singer wrote: > Am Montag, 4. April 2005 20:14 schrieb Jan Frey: > > Hi, > > > > I'm observing strange behaviour with a Gericom notebook running a > > 2.6.9 vanilla kernel with custom configuration. The processor used is > > a P III (Tualatin) with 1.2GHz (which is quite rarely used). It is > > *not* a mobile processor (no speedstep etc.), instead it supports 16 > > throttling levels. > > > > Sometimes (I guess when the machine is getting overheated - the > > notebook design is really bad and the fan is quite lousy) ACPI > > temperature monitor shows >70 degrees (Celsius) and the system starts > > throttling. > > > > Until here everything is fine IMO. > > But what happens next is that the systems slows down continuously (you > > can monitor the current throttling level going up and up) until it > > reaches the last level (12%). Soon after that the whole machine is > > locked up hard, display still showing the current graphics. I guess it > > throttled to a "deathly" 0%... > > > > Is this more a linux acpi problem or a fault in this particular > > machine? What could be done about it? how can I debug further? > > My desktop machine locked up if it got to hot(70-75 degrees, amd duron > processor). I bought a better CPU fan and the problem is gone. Well, > that's impossible on notebooks. > > Is there a 0% throttling level? What happens if you stop processor > hungry tasks to allow the machine to cool down? No, there is no 0% level. Unfortunately this also does not seem to be=20 related to any level of CPU utilization: sometimes the machines locks up=20 even if it is nearly idle, e.g. writing/sending email... Really astonishing: CPU temperature seems to go up to roughly 70 degrees=20 quite quickly and then it stays there nearly forever: it does not matter=20 whether CPU load is 0 or 1.. And: throttling also does not lower CPU temp,= =20 I thought this would be main reason... Br Jan =2D-=20 Jan Frey jfrey-Mmb7MZpHnFY@public.gmane.org ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click