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View Full Version : [ubuntu] 10.04 - Backlight not adjustable on Acer Aspire One



a5an0
April 30th, 2010, 02:25 AM
I have a first-gen Acer Aspire One, and the backlight was adjustable under 9.10 and 9.04 with Fn+[Left Arrow]/[Right Arrow]. I upgraded to Lucid today, and the backlight is no longer adjustable.

Is there some way to bind brightness to a keybinding manually?

Thanks!

npattillo
May 21st, 2010, 04:32 AM
I have an Acer Aspire 5740 and I am having the same issue with Lucid. Let me know if you find anything out.

jlaki
May 21st, 2010, 04:39 AM
i have aspire one d150 and it works well on clean install.

wilee-nilee
May 21st, 2010, 04:43 AM
If you hold down the fn key and use the right or left keys, in the bottom right corner, it will adjust the screen brightness, the up an down keys control the volume.

Gaygerbil
August 4th, 2010, 09:20 AM
It's not adjustable however meaning you either have the backlight off or on and you can't go in between which is lame. Any fix on this yet?

utilitytrack
August 4th, 2010, 11:32 AM
It's adjustable. Try to make screen less bright


# echo 0 > /sys/class/backlight/acpi_video0/brightness

Gaygerbil
August 7th, 2010, 12:26 AM
It's adjustable. Try to make screen less bright


# echo 0 > /sys/class/backlight/acpi_video0/brightness

All that code did was not make my brightness notification show up...thanks. <___<

corrytonapple
August 7th, 2010, 12:31 AM
On your top menu panel (The one with Applications) right-click, one of the sides, then select "Brightness Applet".

Gaygerbil
August 7th, 2010, 01:00 AM
I'm assuming he's using 10.04 Netbook like I am for my netbook, which in case the brightness applet doesn't work for me. It'll show up when added to the panel but I can't adjust the settings on it, it's also like this for my Gf's laptop who runs 10.04 Netbook on another version of this laptop.

Also my brightness notification no longer works, halpz.

utilitytrack
August 7th, 2010, 01:21 AM
to Gaygerbil and others


# echo 0 > /sys/class/backlight/acpi_video0/brightness

Did you run this command from root? Do you sure that not from sudo but from root, yes?

Gaygerbil
August 7th, 2010, 01:40 AM
to Gaygerbil and others


# echo 0 > /sys/class/backlight/acpi_video0/brightness

Did you run this command from root? Do you sure that not from sudo but from root, yes?

How would I run that command as root?

<- Linux Newb.

utilitytrack
August 7th, 2010, 02:03 AM
Ha! Did you wish become a root? Remember that it dangerous. How to: https://help.ubuntu.com/community/RootSudo

corrytonapple
August 7th, 2010, 02:19 PM
I'm assuming he's using 10.04 Netbook like I am for my netbook, which in case the brightness applet doesn't work for me. It'll show up when added to the panel but I can't adjust the settings on it, it's also like this for my Gf's laptop who runs 10.04 Netbook on another version of this laptop.

Also my brightness notification no longer works, halpz.
Yes, it doesn't work for me, either. I was hoping it would work for you. I'll go look for more.

Ha! Did you wish become a root? Remember that it dangerous. How to: https://help.ubuntu.com/community/RootSudo
What is funny about it? I don't think you would give him knowingly a dangerous command. Right click applications, then click edit menus. Go down to system tools and click the check next to root terminal. Close that window and go to Applications>System Tools>Root Terminal. Then copy and paste that code their. Am I right?

Gaygerbil
August 8th, 2010, 09:12 PM
Well the brightness notification thing randomly showed up one time I was putting up my brightness and I got all excited but I just tried it now and it's still not showing.

Edit:

I think I figured out what's going on with my brightness notification, it also happens with power settings it's cuz I'm using the battery applet and having hte icon for power manager off. Is there a way to have the icon off but the notifications still appear?

SafetyScissors
August 18th, 2010, 05:19 PM
I'm having a similar problem with my Acer Aspire 5732Z. The Fn left and right arrow keys bring up a notification that the brightness has been changed, and they also change the value in /sys/class/backlight/acpi_video0/brightness, but the backlight brightness never actually changes, it just stays fully bright. Any ideas what might cause this?

tito_torrisi
August 31st, 2010, 08:27 PM
I'm having a similar problem with my Acer Aspire 5732Z. The Fn left and right arrow keys bring up a notification that the brightness has been changed, and they also change the value in /sys/class/backlight/acpi_video0/brightness, but the backlight brightness never actually changes, it just stays fully bright. Any ideas what might cause this?

I guess this will fix your problem as well:

https://bugs.launchpad.net/ubuntu/+s...ux/+bug/568611

Why does it take so long to push this it into the main kernel?

npattillo
September 10th, 2010, 06:08 PM
I went to think link at Launch pad and it comes up as a bad link. I am still trying to fix this. I have the same issue as stated previously - the backlight notification says that I am adjusting it, but the screen brightness doesn't change. I have tried several suggestions with no success yet. I am just squinting at night time, my laptop is so bright. Thanks for everyone's help!!

tito_torrisi
September 12th, 2010, 04:00 PM
I went to think link at Launch pad and it comes up as a bad link. I am still trying to fix this. I have the same issue as stated previously - the backlight notification says that I am adjusting it, but the screen brightness doesn't change. I have tried several suggestions with no success yet. I am just squinting at night time, my laptop is so bright. Thanks for everyone's help!!

Search for kamal and i915 on launchpad, you will find a ppa with a new Kernel with patches...

npattillo
September 15th, 2010, 06:00 PM
Search for kamal and i915 on launchpad, you will find a ppa with a new Kernel with patches...
Thanks! I will try it and re-post as to any success that I have.

tito_torrisi
September 27th, 2010, 10:41 PM
Thanks! I will try it and re-post as to any success that I have.

Fixed kernel available, check the launchpad bug report again!!

santiagorf
January 30th, 2011, 08:20 AM
with kernel 2.6.32-27 doesn't work on ubuntu 10.04, but i can control the backlight with the keyboard when running with version 2.6.32-24