[[Solved]] Acer V3-571G Brightness Problem in Ubuntu 14.04

If you are facing problem with your screen's brightness with your Acer V3-571G laptop; you can try the working solution below:

This is the solution amongst the various solutions available in the internet that worked for me.

1. First open Terminal with CTRL + ALT + T

2. Run the following command in the terminal:

 sudo gedit /etc/default/grub  

then change

 GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"  
 GRUB_CMDLINE_LINUX=""  

to

 GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"  
 GRUB_CMDLINE_LINUX="acpi_osi=Linux"  

then SAVE & RUN

 sudo update-grub   

Finally RESTART your laptop for the changes to take effect.

HP Laptop Battery Check and Cycle Count

If you are using an HP laptop and have run into a battery problem recently then you can know your battery status by conducting the following simple test using HP's diagnostic software called 'HP Support Assistant.'

The main thing to note in this test is the Battery Cycle Count. Battery Cycle Count tells you the maximum number of times you can charge your battery and the remaining number of cycle count.

Steps for testing:

1. Open HP Support Assistant.
2. At the Bottom Click on Diagnostics
3. Then Click on HP Battery Check. You should see an image as below:

4.  Once the test is successfully conducted in the result screen click on Advanced and you should see a detailed result as below:

In the image as you can see my cycle count is 361/300 means the life span of my batter is already over and I am due by once cycle count; which means time for me to replace my battery.