Ubuntu :: Brightness Keys Don't Work On Acer Aspire 5740

Sep 23, 2010

Quote:

SOLVED (for my laptop at least - Acer Aspire 5740)

The trick was to add "acpi_osi=" (without the quotation marks) to the GRUB parameters. Setting the parameter to an empty string means that no OS is reported to the BIOS. By default acpi_osi is set to Windows NT. I had previously tried "acpi_osi=Linux" but it didn't work, apparently it had to be an empty string.The brightness keys work now I think it might work for other models as well if they have core i3 processors.

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OpenSUSE Hardware :: Acer Aspire 4810T Laptop - Hardware Brightness Keys System Slowdowns, Software Controls Don't Work

Mar 14, 2011

I have an Acer 4810T laptop with Intel graphics. I run openSUSE 11.3, and am about to upgrade to 11.4. But both systems still have a very bad bug with screen brightness. The Fn+Arrow keys do change screen brightness, but after using them the system is rendered extremely sluggish and unresponsive. This sluggishness is most pronounced with a very important Wine app I need to use. The only way to fix the sluggishness is to reboot. With 11.4, the problem is worse because the system boots and automatically partially dims the screen, thus making it even more necessary to change the brightness. Neither Gnome nor KDE are able to change the brightness via their power managers. This means that I can't dim my screen automatically upon disconnecting the A/C power.

I have read many experiences from Ubuntu and openSUSE users, who all have the same problem. I have tried both intellegacy and the new intel drivers, and they both have the problem. I have read that some users have improved the situation by upgrading or downgrading the BIOS. Others have been experimenting with kernel patches:

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Aug 5, 2010

I am a new user of Ubuntu, I use Ubuntu 10.04 Lucid Lynx on my laptop Acer Aspire 4741G and the specification are:

1. Intel(r) Core(tm) i5-430M Processor
2. Intel(r) HD Graphics
3. 2GB Memory
4. HD LED LCD

I have a problem in adjusting brightness, before this laptop, I used Ubuntu on my Acer Extensa, all shortcut buttons are working properly, include Fn button. To adjusting brightness, I only have to push Fn button + arrow left or arrow right. And now, I try in Aspire 4741G, it does not work. I also try to type command via terminal:

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Jun 10, 2010

Last weekend I installed Ubuntu 10.4 (Netbook remix) on my new Acer Aspire 751h. The installation seemed to go smoothly, but I've noticed several things that don't work as well as on my old AA 110. I should say that I installed Ubuntu in a dual-boot setup with Windows XP, which the machine already had installed. Firstly, the screen brightness can't be adjusted with the function key/hotkey combination. The sound volume hotkeys work fine, and the brightness hotkeys work with XP, so it's not a hardware issue. The default brightness is pretty dim, so this is an annoying problem. Is there a way to bind the hotkeys to the 'increase/decrease brightness' functions?

Secondly, the vertical scroll bar on the desktop doesn't work, by which I mean if I click above or below the highlighted area no scrolling takes place. However, I can drag the highlighted area up or down and scrolling does take place, and scrolling via the touchpad works. All forms of scrolling work normally within applications. Is there anything I can do to fix this? It's only a mild annoyance, though. Thirdly, in the power management preferences application I don't have an 'On Battery Power' tab - just 'On Mains Power' and 'General'. There are some other peculiarities that probably follow on from this. I have a power indicator in the top panel of the desktop, but on bootup it's a 'lightning bolt' icon rather than the battery-shaped icon it should be. If I plug into mains power, it changes to a battery-shaped 'charging' icon until it's fully-charged, when it changes back to the lightning bolt. If I then unplug the mains power, I get a battery-shaped 'discharging' icon, but this doesn't survive a restart. Obviously, a battery level indicator is very useful and I'd like to get it working properly. The help file for power management preferences says something about GConf policy keys that need to be made writable in order to display some sliders and option boxes. I certainly don't have as many sliders and options as shown in the help file. I guess this might be related to the screen brightness problem.

Finally (for now - I haven't explored everything yet) the screen ratio looks wrong. Circular icons appear as ovals. It looks like the software thinks I've got a 4:3 ratio whereas really it's widescreen. I can't see where I can change this. I've looked in 'System.. Preferences. Monitors' but there's nothing I can change there. System testing shows the apparent resolution at 1024x768, whereas the hardware spec is 1366x768. I'm wondering whether to try to fix these things individually or whether a better option might be a reinstall - perhaps without the XP dual boot. What do you think? I'm willing to change settings from the terminal but I'd need to be told exactly where to go and what to do.

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Apr 28, 2011

This fixed a black screen issue and a brightness adjustment issue after installation of ubuntu. Also on 11.04 I couldn't get Unity to work until I edited grub I didn't come up with the fix but it took me forever to find a solution so I figured I would post it. If I have did something wrong just get a mod to delete or move this. I don't use forums often.

Code:
sudo gedit /etc/default/grub
Edit two lines to read as follows:

[code]....

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Ubuntu :: FN Keys Of Laptop Brightness Does Not Work

Jul 25, 2011

I have installed Xubuntu 11.04 on a HP Probook 4510S and the FN Keys of brightness only works when I on the login screen (gdm). Until I enter to my desktop the FN Keys stop Working. This is a XFCE Issue? I have another Laptop, a IBM THinkpad X40, with the same Xubuntu 11.04 and the FN Keys works perfect! Even the keyboard light Works! I think this is a ACPI related problem, I google it the problem with out a specific issue like this. The only thing that I can do it is use of xbacklight when I'm on my session.

root@xavierc-lt-xub:~# ls /proc/acpi/
ac_adapter battery button event wakeup
root@xavierc-lt-xub:~#

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Oct 30, 2010

i use a HP Pavilion dv6-3016ax everything works perfectly and i am very happy with ubuntu! If i could get the Brightness keys to work and the microphone i'd be even better. The brightness FN keys change the slider but make no physical difference of the brightness. And the microphone just doesn't work.

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Feb 5, 2011

Fresh install Ubuntu 10.10 on Acer Aspire 5050 with new hard drive. I struggled to turn the Wifi's button turn on but led light always on. It does not detect wifi driver. I installed ndiswrapper to get Acer's Winxp driver: netathr.inf by Windows Wireless Drivers from Ubuntu Software download. It's same thing as ndiswrapper.

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Jun 29, 2011

My Acer Aspire one D250 laptop running Ubuntu 10.10 wireless does not work. I dual boot with Windows XP BUT windows XP wireless works fine. here are some details you might need.

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Feb 20, 2010

I can't get my wireless card to work. I downloaded a broadcom driver for it and i do believe its the right one, but its not helped. I'm running mint 8. The information on my internal wireless card i got using the terminal is:

lspci
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 760/M760 Host (rev 03)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] SG86C202
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS963 [MuTIOL Media IO] (rev 25)
00:02.1 SMBus: Silicon Integrated Systems [SiS] SiS961/2 SMBus Controller
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[Code]....

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Jan 26, 2011

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Enter terminal command;
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Feb 9, 2010

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5) I just noticed that the sound doesn't seem to work yet either.

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Mar 3, 2010

I Install Ubuntu 9.10 and I can't control Brightness, show brightness popup (Fn+F5F6) but screen brightness don't work, I install NVIDIA Driver Linux-x86_64 version 190.53, modiffed xorg.conf.

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Jan 3, 2011

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May 25, 2011

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I Add the repository to the sources list and enable it
sudo add-apt-repository ppa:voria/ppa
Perform complete system update
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it may take long time depending the internet connection
than I installed packages "samsung-backlight" and "easy-slow-down-manager"
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Jan 17, 2010

EDIT: I finally figured out how to do it - xbacklight -dec 10 lowers, xbacklight +inc 10 increaces. I'll use ubuntu tweak to get the shortcuts. I got my self a new lappy, and Acer Aspire One 751h-1948. After that, I installed Ubuntu Karmic on that, while leaving a 20GB XP partition. I configured it's Intel GMA500 Poulsbo video card, so now I can use it at the native 1366x768 res. Most of my fn keys work, other than one very important one, and here lies my problem; The brightness keys dont work(fn+left/right arrow). I've searched the net for a long time, but I still can't find a solution that works with karmic - perhaps i should downgrade?

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Jul 6, 2010

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Are there any solutions available for this particular laptop model?

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Feb 26, 2010

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May 11, 2010

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Nov 24, 2015

When I first install debian I couldn't change the screen brightness at all not manually nor with function keys, but I tried some of the solutions I found on the internet and now I can change the brightness manually (from the power management or the battery icon) but when I use the function keys it takes them like 2 to 3 minutes to respond and cause the system to hang (even mouse curser not responding) and then I'm forced to manually reboot the system, here is some information :

Code: Select all$ ls /sys/class/backlight/
acpi_video0  intel_backlight
 
Code: Select all$cat /etc/default/grub
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

[Code] .....

And I've tried this:

Code: Select allsudo -i kwrite /usr/share/X11/xorg.conf.d/20-intel.conf

And I add the following in this file

Code: Select allSection "Device"
        Identifier  "card0"
        Driver      "intel"
        Option      "Backlight"  "intel_backlight"
        BusID       "PCI:0:2:0"
EndSection

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May 3, 2010

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May 22, 2010

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May 17, 2010

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Jun 9, 2010

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Jul 19, 2010

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