From mboxrd@z Thu Jan 1 00:00:00 1970 From: Venkatesh Pallipadi Subject: Re: ondemand vs suspend. Date: Wed, 21 Jun 2006 11:54:13 -0700 Message-ID: <20060621115413.A16324@unix-os.sc.intel.com> References: <44972ACB.2040609@goop.org> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <44972ACB.2040609@goop.org>; from jeremy@goop.org on Mon, Jun 19, 2006 at 03:52:59PM -0700 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cpufreq-bounces@lists.linux.org.uk Errors-To: cpufreq-bounces+glkc-cpufreq=m.gmane.org+glkc-cpufreq=m.gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Jeremy Fitzhardinge Cc: Dave Jones , cpufreq@lists.linux.org.uk, pjones@redhat.com On Mon, Jun 19, 2006 at 03:52:59PM -0700, Jeremy Fitzhardinge wrote: > Pallipadi, Venkatesh wrote: > > Yes. I am able to reproduce this 2.6.17-rc6 and trying to narrow it > > down. > > > > Also, there is a known issue with ondemand and resuming anyway as the > > second CPU will not be able to resume with ondemand, but instead will go > > back to 'default' governor on initialization. > > So, even with this bug fixed, we cannot suspend-resume with ondemand > > governor. Workaround for now can be just to switch to default governor > > before suspend and go back to ondemand after resume, using initscripts. > > > I've noticed another problem, which may be related. Sometimes after > resume, cpufreq seems to lose the ability to control the CPU speeds: > they stay at the lowest performance level, and don't change regardless > of what governor I set. I'm seeing this on a T2400 Core Duo. I'm not > sure if this is a speedfreq-centrino problem or cpufreq itself. > > J Does it only happen on CPU 1 or both the CPUs? What does /sys/.../cpufreq look like once you get to this stuck at lowest freq state? Does scaling_available_frequencies still show all the freqs. Thanks, Venki