I recently bought Acer timeline 3830tg for my studies and installed ubuntu 11.10 and currently using gnome-shell. I also have changed by graphics mode from hybrid to integrated mode to increase battery backup. With all this steps I have encountered some more problems. Could you please help to fix these issues:

  1. Fan gives too much loud noise (does not even stop for single second this didn't happen in Windows)
  2. Battery backup in Windows was 7 hours plus but it hardly shows 3 hours in Ubuntu
  3. I am not able to control screen brightness from keys provided
  4. I had used gparted for partition. in one partition i have not kept single file/folder but then also it shows 34gb used

I would be very thankful if someone could help me to solve this problems as soon as possible, especially the battery backup issues.

  • Is this ubuntu fresh installed? Did you face any problem with ubuntu(unity ) default? install powertop: sudo apt-get install powertop . run it in terminal : powertop . install jupiter which is a indicator applet helps to select processor mode [powersaver or performance etc]
    – shantanu
    Commented Jan 2, 2012 at 19:54
  • i have installed fresh copy of ubuntu and also updated till date. the main problem is fan does not stop for even single second...and i am not able to control brightness too Commented Jan 4, 2012 at 12:59
  • maybe this thread will help your: askubuntu.com/questions/75219/…
    – shantanu
    Commented Jan 4, 2012 at 19:08
  • 1
    fan and battery issue solved by following Brightness control steps of the post (linlap.com/wiki/acer+aspire+s3) Commented Jan 15, 2012 at 16:10

1 Answer 1


I am also using acer aspire 5742 laptop.

I made changes in GRUB_CMDLINE_LINUX_DEFAULT and GRUB_CMDLINE_LINUX to /etc/default/grub
- GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pcie_aspm=force"
- GRUB_CMDLINE_LINUX="acpi_osi=Linux"
and after adding these lines update grub from terminal by executing

sudo update-grub

By default the above lines will be different please check it and modify it.

If you are using sandbridge processor then after making change refer

Laptop minimal power consumption tweaks

And then check hows the performance and the operation of fn key

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