Thursday, September 20, 2012

Battery details using Terminal

Recently I installed Xubuntu which being awesome and far better than Ubuntu' s Gnome lacks some of the features like showing estimated battery time remaining.

I tried a lot to  find out a solution for this recently came across a ask Ubuntu thread which describes a way to obtain battery details using Terminal.

Using upower you can get all the battery details.

To view all the details you can use

upower -i /org/freedesktop/UPower/devices/battery_BAT0

Use grep to remove the unwanted details from the above result

upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep -E "state|time|per"

You can create alias for the same command so that you can run it using just the alias that you gave

alias bat='upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep -E "state|time|per"'

To permanently add this to your system terminal just copy paste the same command to .bashrc or /etc/rc.local

Thursday, September 13, 2012

Permanently adjust screen brightness in Ubuntu 12.04 / Linux Mint 13

This tutorial will help you to adjust the screen brightness in Ubuntu 12.04 / Linux Mint 13 during each boot automatically.

Tested in Intel i7 laptop with Nvidia Graphics Card, this idea will work only if you have a file named brightness in /sys/class/backlight/acpi_video0

To know your systems current brightness level.
cat /sys/class/backlight/acpi_video0/brightness

Change brightness by changing the value 
echo 0 > /sys/class/backlight/acpi_video0/brightness

To permanently set the brightness you can use the rc.loacal script file to change brightness which is executed at each reboot
sudo gedit /etc/rc.local

add the following line above "exit 0" seen at the bottom of the document 
echo 0 > /sys/class/backlight/acpi_video0/brightness
save the file and restart your system.

You may also refer this.
Please free to post issues as a comment.

Saturday, September 8, 2012

Proper Nvidia Optimus Drivers for Ubuntu / Linux MInt

Note : These setting where tested @ Asus K53SV ( Nvidia 540M ) , but it should be working for any Nvidia graphics card with Optimus.

I have been using Linux for past two years, I was never satisfied with the battery life and graphics quality of Linux even though I had i7 processor and Nvidia 540M graphics tried lot of Nvidia Installations either they crashed or they crashed my entire system.Now I tried out bumblebee which works perfectly just like a switchable graphics.

Okay lets Install Bumblebee
  1. Get rid of all Default driver you already have in your system
    sudo apt-get purge xserver-xorg-video-nouveau
  2. Install Bumblebee ppa
    sudo apt-add-repository ppa:bumblebee/stable
  3. Update and Install Bumblebee
    sudo apt-get update && sudo apt-get install bumblebee

In case of an error (I got an error related to users addition to group) use these two commands
     sudo usermod -a -G bumblebee $USER
     sudo apt-get install virtualgl-libs:i386 libgl1-mesa-glx:i386 libc6:i386

To run application using Nvidia drivers you can use Optirun command in terminal it takes application name as parameter for example 

To run Vlc 
          optirun vlc & 
          optirun firefox &
I was able to achieve a increase of about 1 hour in my battery life. I have also heard that this can decrease the heating in Dell Laptops,but its a fact that we all done a mistake by selecting a optimus laptop for Linux use even after installing bumblebee you wont to be able to use HDMI output and some other functions that windows provide, I'm not sure may be I haven't come across such solutions yet.

You can Install the Bumblebee UI too!


Wednesday, September 5, 2012

Cowon iAudio E2 Review

Here is the review for one of the best screen less mp3 player ( ipod shuffle like device).

Sound Quality

Its more or less better than Apple Ipod shuffles music quality. It has better clarity but lacks in maximum sound ( Though the sound will be enough for most people ). This device come with some preset equalizers which can be toggled using a button ( Ipod shuffle lacks this feature ) .
Overall the sound quality GREAT!


Made with plastic kinda material but its really strong ( not as strong as Ipod its metal body).

Formats Supported

  1. Mp3
  2. Wma
  3. Wav
  4. Ogg
  5. FLAC

Apple shuffle doesnt support most of these formats.


  • Can skip folders using volume buttons ( switch off shuffle press volume button twice within 2 seconds ) this feature is really good for screen less players
  • Equalizers
  • Can be used as a Key chain or Can be attached to your jean / Shirt buttons 
  • Compact design 
  • 10 hours of battery life + takes just 90 minutes to charge Full
  • This device doesnt require any particular software to transfer data .As a result it can be used with any os through USB connection unlike Apple shuffle which requires iTunes.
  • In India E2 comes with one year warranty.

Overall this is a great equipment which is very small good for those who do jogging / gym. Better than Apple shuffle in most of the features. I really recommend this product really satisfied with the quality.

You Can Buy this product in India from these online vendors.

Flipkart / Infibeam