http://bugzilla.novell.com/show_bug.cgi?id=502569
User rui.zhang@intel.com added comment
http://bugzilla.novell.com/show_bug.cgi?id=502569#c9
--- Comment #9 from Rui Zhang 2009-05-21 19:43:21 MDT ---
By reading the acpidump, I found that there are no 0x86/0x87(brightness
up/down) events sent to ACPI LCD device, which means that the ACPI video driver
will never be notified upon pressing the hotkeys.
I have a sony-z540 on hand, which has the similar symptom as yours.
I don't ANY interrupts are generated when pressing hotkeys.
it would be great if you can verify if it works in windows.
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