From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ben Widawsky <ben@bwidawsk.net>
Subject: Re: Fan constantly running with Intel Graphics card
Date: Sat, 11 Aug 2012 12:17:21 -0700
Message-ID: <20120811121721.28dacb9c@bwidawsk.net>
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To: Patrick O'Byrne <pobyrne2@gmail.com>
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On Fri, 10 Aug 2012 14:28:35 +0000 (UTC)
Patrick O'Byrne <pobyrne2@gmail.com> wrote:

> Hi,
> 
> I am having an issue with a new Dell E5520 laptop (Intel(R) Core(TM)
> i5-2520 CPU @ 2.5GHz) running Linux Mint 13 (Kernel: Linux
> 3.2.0-23-generic (i686)). I am using the graphics driver that ships
> with the kernel:
> 
> 00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd
> Generation Core Processor Family Integrated Graphics Controller
> [8086:0126] (rev 09)
> 
> My problem is that the fan is constantly on even though I am not
> doing any intensive processing.  The laptop runs very nicely
> (quietly) when I boot into Windows 7.
> 
> There was a recent post which suggests running the following commands:
> 
> $ cat /sys/kernel/debug/dri/0/i915_cur_delayinfo | grep Lowest
> then echo that value into the max freq file, e.g.:
> $ echo 400 > /sys/kernel/debug/dri/0/i915_max_freq
> 
> 
> I tried this (and restarted the machine) but still no joy, it seems
> that in my case GPU frequency is not to blame.  Any advice would be
> greatly appreciated.
> 
> Regards
> Patrick
> 
> 
> 

Can you please try sysfs_rc6_residency test in intel-gpu-tools? This
might be the same issue I am currently fighting.

-- 
Ben Widawsky, Intel Open Source Technology Center