[hardy] brightness increase instead of decrease (Acer laptop)

[riu]

Fn+arrow keys (<--- and --->) works properly at welcome screen and while booting. But after you log in, "Fn+(<---)" does the opposite of what it should, and the same with "Fn+(--->)". Instead of decreasing brightness, "Fn+(<---)" makes it brighter. Instead of increasing brightness, "Fn+(--->)" does the opposite. A brightness bar appears when you press these keys. When you press these keys at welcome screen, they work properly and smooth (brightness bar does not appear). When you press them after logging in, they work improperly. In ubuntu 8.04 live cd, there was no the bug (I have checked this just now). Seemingly, after an update, in ubuntu 8.04.1, brightness keys work not properly and not as smooth as before.

(This bug affects also 8.10)

[riu (stanray)]

Maybe this is a bug in linux-ubuntu-modules package or the linux kernel? Apparently, there is a code that confuses Fn+Left with Fn+Right. First, bios decreases brightness by "Fn+Left"; second, GNOME roughly increases it. In the end, brightness increases. Bios changes brightness slower than GNOME, that is why GNOME wins.