This is also happening to Acer Aspire Timeline 5810T and 4810T on Ubuntu
9.10, 10.04, and 10.10.
A similar bug post:
https://bugs.launchpad.net/ubuntu/+bug/573373
I tried "Step-by-step Troubleshooting" from
https://wiki.ubuntu.com/Hotkeys/Troubleshooting
The Fn+Right/FN+Left (brightness down/up)
Silly, I can adjust the brightness, but can't use Ubuntu any more till next
restart.
Ubuntu completely freezes right after pressing Fn+Right/FN+Left (brightness
up/down).
--
Screen brightness adjustment does not change at all on my Acer Aspire Timeline
5810TZ
https://bugs.launchpad.net/bugs/66
also affects Acer Timeline 5810T, and probably 5810TG, 4810T and 3810T
on Ubuntu 10.10
--
On laptop Acer Timeline, Bluetooth switch changes brightness
https://bugs.launchpad.net/bugs/492657
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