Ubuntu
acpi package

Screen Brightness

Asked by Bhaskar

I have Acer aspire 5755 in which i have just installed Ubuntu 12.04. But i am unable to reduce the screen brightness. so what should i do?

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actionparsnip (andrew-woodhead666) said : 		#1

Can you give the output of:

lsb_release -a; uname -a; apt-cache policy acpi

Thanks

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Bhaskar (bhasu23) said : 		#2

should I enter the above said command in terminal. ?

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actionparsnip (andrew-woodhead666) said : 		#3

Yes please, post the output as an update.

Thanks

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Bhaskar (bhasu23) said : 		#4

 lsb_release -a;
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04 LTS
Release: 12.04
Codename: precise

uname -a;
Linux ubuntu 3.2.0-23-generic-pae #36-Ubuntu SMP Tue Apr 10 22:19:09 UTC 2012 i686 i686 i386 GNU/Linux

apt-cache policy acpi
acpi:
  Installed: (none)
  Candidate: (none)

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actionparsnip (andrew-woodhead666) said : 		#5

Run:
gksudo gedit /etc/default/grub

Find:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

to:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor acpi_osi=Linux"

Save the new file, close gedit and run:
sudo update-grub

Reboot to test

Source:
http://ubuntuforums.org/showthread.php?t=1742352

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Bhaskar (bhasu23) said : 		#6

Thanks a lot. the trick is working:)

i want to know one more thing, is there any downloading application for Ubuntu just like Internet Download Manager for windows?

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actionparsnip (andrew-woodhead666) said : 		#7

FatRat
jDownloader
uGet

Are 3 I can think of quickly

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