http://bugzilla.kernel.org/show_bug.cgi?id=14548


ykzhao <[email protected]> changed:

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--- Comment #2 from ykzhao <[email protected]>  2009-11-06 05:50:31 ---
Will you please attach the output of acpidump, lspci?

Will you please check whether there exists backlight interface under the
/sys/class/backlight/? For example: acpi_video0 .If it exists, please check
whether the brightness can be changed by using the following command:
    >echo 5 > /sys/class/backlight/acpi_video0/brightness

Thanks

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