http://bugzilla.kernel.org/show_bug.cgi?id=12233





------- Comment #14 from shell...@gmail.com  2008-12-18 21:22 -------

(In reply to comment #13)
> 1. Good point - we need to see what effect a BIOS upgrade has.
> 2. That's a very good question.  From what little information I've seen on the
> subject it seems that whether the hotkeys are captured by Linux or not (via 
> the
> fujitsu driver or elsewhere) depends on the laptop.  On my S7020 the 
> brightness
> hotkeys don't appear visible to software at all (and in fact work perfectly
> fine without any ACIP video/fijitsu-driver modules loaded).  Other models
> however seem to see the brightness hotkeys in software with the existing code
> ACPI video/Fujitsu code.  So it's a little unclear as to what exactly is 
> needed
> in the general case.
> I'll have to look into the notifier functionality in more detail, but on the
> face of it what you've suggested sounds reasonable if it turns out to be
> necessary for particular models.
Thank you very much, I'm qutie sure that my laptop controls the backlight
throught ACPI, because when the fujitsu-laptop module was not installed, the
hotkeys does not work at all. When the fujitsu-laptop module was installed and
I pressed the hotkeys, the gonme-brightness-applet can catch the event and show
an icon in the middle of the screen, so I think the software can feel the
hotkey events.
I think that nowthat the hotkeys work very well on Windows XP, it can also work
well on Linux, so I think the BIOS is not the problem, but I'll still try to
upgrade it(if I can find a newer version).
My laptop is an old type which was published at 2006, so I think it will not
work for me to upgrade to 2.6.28 kernel, but I will do that tonight :)
By the way, I can change the backlight in this way:"echo n >
/sys/devices/platform/fujitsu-laptop/lcd_level"(n differents from 1 to 7) and
it works perfectly, so I still think  the problem is caused by software.
Thanks a lot to all of you!


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