Workaround for UL30 (UL30A-A2 and others) brightness keys in Ubuntu 10.04 (Lucid)

EDIT (2011-05-11): this should also work for 11.04.

With some models of Asus ul30 family (mine is ul30a-a2), brightness hotkeys don’t work properly in Lucid.  They change the brightness somewhat randomly, also sometimes causing ACPI to “freeze”.

The actual bug is here:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/543294

The (temporary) workaround, originally from here:

Edit /etc/default/grub as root
Find, and change this line : GRUB_CMDLINE_LINUX=”acpi_backlight=vendor”
call update-grub as root, reboot.

Since not being able to run popular distros can be a dealbreaker for laptop buyers, here’s a summary of my experience with this laptop:

Question: How well does Lucid Lynx run on UL30A-A2?

Answer: Flawless, except for the brightness key bug mentioned above and screen flickers, which also has a workaround.

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Getting uw-secure to work with Ubuntu 10.04 (Lucid)

Right click on wireless icon, Edit Connections.

Click on Wireless tab.

Find uw-secure, click on Edit.

Fill in the following information:

Security: WPA & WPA2 Enterprise
Authentication: Protected EAP (PEAP)
PEAP version: Automatic
Username,Password: Your UWDir username, password

If you can’t use uw-secure for some reason, uw-wireless is OK too. One caveat is that you must use Firefox to authenticate first before accessing external (outside uwaterloo.ca domain) websites – Chrome doesn’t seem to bring you to the login page.