My laptop configuration are Dell 3521 Core i3 3227U @ 1.9Ghz 4GB RAM Intel HD4000 graphic + radeon HD7670m 1GB DDR3 dedicated graphics.

When I boot Ubuntu 14.04.02LTS on my laptop, CPU cooling fan starts to run continuously at max speed making a loud sound while the laptop is in idle state :( and also the air blown out side is not hot, just normal air. I Constantly updated my OS but nothing stops the fan running at max speed. So I thought that Open source driver is the problem so I tried fglrx proprietary driver through the additional hardware. But still the same problem exists. Then I moved to Ubuntu 14.10 and installed the available intel driver at 01.org, but still the problem is not solved. Then Today I installed Ubuntu 15.04 with fglrx proprietary driver, but still the problem is unsolved. Please guys tell me how to fix this as soon as possible. Thanks

Here it is

root@kasun-Inspiron-3521:/home/kasun# lspci -k | grep -EA2 'VGA|3D'
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
    Subsystem: Dell Device 0598
    Kernel driver in use: i915
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Thames [Radeon HD 7500M/7600M Series] (rev ff)
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05)
    Subsystem: Dell Device 0598

  • Please edit your question and add output of lspci -k | grep -EA2 'VGA|3D' terminal command. – Pilot6 Jul 25 '15 at 15:17
  • It does not look like you installed fglrx driver? How did you install it? – Pilot6 Aug 11 '15 at 19:00
  • by using the additional drivers at the Software and updates – Kasun Siyambalapitiya Aug 26 '15 at 19:29
  • please can anyone help me with this issue, I am really bored with the fan noise and couldnot do any work. So please help :( – Kasun Siyambalapitiya Sep 29 '15 at 2:37
  • Please run in terminal sudo apt-get install fglrx-updates. If there are any errors post output to your question. – Pilot6 Sep 29 '15 at 8:05

I solved it by using i8kutil package which is used for controlling the fans in Dell laptops.

Use this solution found at this webpage: How to solve Dell laptops fan issues in Ubuntu.

I used this config for my Dell 3521 with Radeon HD7670M 1GB dedicated graphics.

# Sample i8kmon configuration file (/etc/i8kmon.conf, ~/.i8kmon).
# External program to control the fans
set config(i8kfan)  /usr/bin/i8kfan
# Run as daemon, override with --daemon option
set config(daemon) 0
# Automatic fan control, override with --auto option
set config(auto) 1
set config(nouserconfig) 1
# Applet geometry, override with --geometry option
set config(geometry)    {48x48}
# Report status on stdout, override with --verbose option
set config(verbose) 1
# Status check timeout (seconds), override with --timeout option
set config(timeout) 5
# Temperature display unit (C/F), override with --unit option
set config(unit)    C
# Temperature threshold at which the temperature is displayed in red
set config(t_high)  80
# Temperature thresholds: {fan_speeds low_ac high_ac low_batt high_batt}
# These were tested on the I8000. If you have a different Dell laptop model
# you should check the BIOS temperature monitoring and set the appropriate
# thresholds here. In doubt start with low values and gradually rise them
# until the fans are not always on when the cpu is idle.
set config(0)   {{-1 0}  -1  60  -1  65}
set config(1)   {{-1 1}  50  70  55  75}
set config(2)   {{-1 1}  60  80  65  85}
set config(3)   {{-1 2}  70 128  75 128}
# end of file

After configuring run this in terminal on every boot up:

i8kmon --auto --verbose --nouserconfig

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