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[Bug 578578] Bright control not working at all with Acer Extensa 5635Z

https://bugzilla.novell.com/show_bug.cgi?id=578578

https://bugzilla.novell.com/show_bug.cgi?id=578578#c18


--- Comment #18 from Joey Lee <jlee@xxxxxxxx> 2011-09-15 12:15:51 UTC ---
(In reply to comment #14)
(In reply to comment #13)
Again, this is a machine that have EC firmware problem to handle the
brightness
level. If the EC firmware works fine, then don't need add acpi_osi=Linux:

To verify it we might need to install Windows (better be Windows 7) on it and
see if brightness works. But It's not worth for doing it IMO. :)

Install Windows might not be work, because we need Acer's windows 7 preload
image, not just install a standard windows 7.

At least download the Windows 7 video driver from acer website and install it.
Then compare the brightness control function before acer's driver installed and
after.

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