From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johannes Bauer Subject: Sandy Bridge: Return of the "running fan" issue Date: Sun, 09 Sep 2012 20:25:29 +0200 Message-ID: <504CDF19.8060409@gmx.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mailout-de.gmx.net (mailout-de.gmx.net [213.165.64.22]) by gabe.freedesktop.org (Postfix) with SMTP id 9FDF19E78C for ; Sun, 9 Sep 2012 11:25:15 -0700 (PDT) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org Dear list, I've previously had an issue with my Dell Laptop (Latitude E5520) which has a i915 graphics card on a Sandy Bridge (2011-12-13 "Fan running with Intel Graphics"). The fan was running because apparently the GPU was not going into powersave mode. Now, by sheer stupidity on my part, I've lost my kernel configuration and the (working) kernel image. So I embarked on the journey to retrieve the latest git and see how it goes. Sadly, the running fan is back: I've checked out drm-intel-testing, rev. c3c3d4e9. My kernel command line looks like this: pcie_aspm=force i915.i915_enable_rc6=3 i915.lvds_downclock=1 i915.i915_enable_fbc=1 nomodeset Previously, I've always done echo 400 >/sys/kernel/debug/dri/0/i915_max_freq but with this kernel revision, /sys/kernel/debug/dri/ is empty and there's no i915_max_freq node anywhere to be found within /sys. Should I update to a different branch? Should I change the kernel command line? Or are there other options? Any advice is greatly appreciated, All the best, Joe