OK, you provided me fair amount of texts to read :)

W dniu 15 września 2009 09:43 użytkownik Zhang Rui
<rui.zh...@intel.com> napisał:
> And I think it may work for you as well, i.e. two backlight sysfs I/F
> may co-exist, it's the user space to decide which I/F to use.

Could you  explain, please, how does work Fn+F5 and Fn+F6 in
notebooks? I thought it generates some ACPI that kernel identifies as
backlight up/down and kernel passes it to module registered with:
backlight_device_register(...)
is that right?

Then two backlight devices would be a problem, I guess?

-- 
Rafał

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