https://bugzilla.kernel.org/show_bug.cgi?id=21212





--- Comment #11 from Zhang Rui <rui.zh...@intel.com>  2010-11-03 05:57:39 ---
Created an attachment (id=35972)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=35972)
patch: do not trust BIOS initial backlight

please apply this patch, set CONFIG_ACPI_VIDEO=y. rebuild the kernel and boot
with video.use_bios_initial_backlight=0.
please attach the output of "grep . /sys/module/video/parameters/*" if the
problem still exists.

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