brighness works in the opposite way on Lenovo Ideapad Y530

[Katsudon]

Ubuntu 8.10 with all upgrades.
laptop Lenovo Thinkpad Y530

Brighness controls work in a rather strange way.
Increasing the brightness (Fn+Up) is correctly recognized (the on-screen display shows increasing the brightness), but the outcome is opposite: the screen is dimmed. With decreasing the brightness the situation is opposite.

Therefore, to have the screen on full brightness one has to *decrease* the brightness almost completely. Almost, because making one decrease too much actually almost completely switches the brightness off.

[Marc_dm (mdemaillard)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug #301026, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

[Katsudon (katsudon)]

As far as I understand, the suggested policy is to have one bug report per bug.
The problem with bug report #301026 is that the "official" record of the bug concerns only the issue "screen brightness is not changed". The reverse working of the brightness is a separate issue ("a second bug"). Therefore I suggest that these two bugs should be kept separate. I am removing the duplicate.

[Marc_dm (mdemaillard)]

Hi, obviously you're right here, i did do some wrong duplicate linking yesterday... sorry for that.

To try and help a bit on that one : obviously one key stroke makes 2 things go in opposite ways... to know which one is right, we need to know which order is actually sent when you stroke. maybe you could try to get some more info : lookin to other similar bugs it seems xev is one possible tool for that (http://www.xfree86.org/current/xev.1.html).
If the "brightness down" key stroke is correctly recognised by X, then the brightness part is wrong and the display bar right
If a "brightness down" is recognise as "brightness up" event, then opposite.

[Gary Trakhman (gary-trakhman)]

this affects the thinkpad SL series as well, i'm going to mark it duplicate

[Gary Trakhman (gary-trakhman)]

(b/c the SL series uses Ideapad firmware)

[Gary Trakhman (gary-trakhman)]

I guess I can't... someone please mark this duplicate of bug 301524