Since I've recently upgraded from 11.04 to 12.04 I thought it would be good to share my experience with other Acer TimelineX 3820tg owners.
Fixes from the kernel:
- All of the 'atom bios' video issues appear to be gone
- You'll no longer need to tweak the trackpad
Screen Brightness ConfigurationFix the screen brightness - unless you apply this, you will not be able to increase/decrease brightness on this computer (thus sucking battery life):
- As root navigate to (you can do this by entering "gksu nautilus") and edit : /etc/default/grub
- Change the line GRUB_CMDLINE_LINUX="" to GRUB_CMDLINE_LINUX="acpi_osi=Linux"
- save the file
- and then (in a terminal): sudo update-grub
Radeon blacklistingFirst, open /etc/modprobe.d/blacklist.conf as root (I always use "gksu nautilus" to open the file manager as root and then navigate there). Once you have opened it with a text editor add the following line add the end:
Once you have done that, save the file and close the text editor. When you reboot, the system will no longer try to use the radeon card.
Note: If you plan on using the Radeon card, don't perform the blacklist step.
Now open /etc/rc.local (still as root) and add the following lines BEFORE 'exit 0'
modprobe radeonAgain, save the file. Now the radeon module will be re-loaded, vgaswitcheroo will be reenabled and the ATI card will be turned off. Cooler, quieter and better battery life.
echo OFF > /sys/kernel/debug/vgaswitcheroo/switch