*Update: Finally after going through tens of webpages and trying out a number of things, I've a solution to display brightness problem on my e-machine e-727.
Apparently all I was needed was:
1. Edit /etc/default/grub file.
$sudo gedit /etc/default/grub
2. Change GRUB_CMDLINE_LINUX="" to GRUB_CMDLINE_LINUX="acpi_osi=Linux"
3. Save and close the file. And update grub.
Before I tried various other malodies, but none of them worked for me. That included
1. Trying to input brightness value manually
#echo -n 30 > /proc/acpi/video/OVGA/DD02/brightness
2. Another method was very similar to the one above except we added "acpi_backlight=acer".
3. One method which was partially worked was restarting the machine and adjusting the brightness at grub (The keys worked at grub.)
And then booting the OS from there.
That is it.
Last updated: 6-9-2010General Hardware Specifications of e-machines e-727:
Status under Linux
|Pentium D Processor, 2.3 GHz||Works||No special procedure required during installation.|
|ACPI Support||Works||No special procedure required during installation|
|15.6 WXGA TFT Display||Works||No special procedure required during installation|
|INTEL GMA 4500MHD||Works||No special procedure required during installation|
|1GB DDR3 RAM||Works||No special procedure required during installation|
|250GB SATA Hard Drive||Works||No special procedure required during installation|
|Integrated 10/100 Network Card||Works||No special procedure required during installation|
|8X DVD/RW Drive||Works||No special procedure required during installation|
|Realtek 802.11 B/G/N WiFi||Works||No special procedure required during installation|
|58 WHr Lithium-Ion Battery||Works||No special procedure required during installation|
|Realtek Integrated Sound||Works||No special procedure required during installation|
|External Display||Yet to try||No Info|
|Multi Card Reader||Yet to Try||No Info|
Basic Installation of Ubuntu 10.04:
Ubuntu 10.04 (Lucid) is the latest LTS version from Canonical. It's stable, fast and the new look is cool.
You can get it from www.ubuntu.com
Please follow the same procedure as a desktop installation of ubuntu. After the reboot you'll have almost everything working. The sleep function worked. The display resolution was set perfect. The audio/wifi/plugs everything worked out of the box. The only problem was with display brightness. It can't be changed. The Fn+Left/Right combo shows the brightness notification but there is no change.
The Brightness cannot be changed. (Perhaps it's a driver issue. I'm searching for a solution.)
You can contact me at : vaibhav[DOT]dlv[AT]gmail[DOT]com
Or you can leave comments for me at : pointelement[DOT]blogspot[DOT]com