https://bugzilla.kernel.org/show_bug.cgi?id=15204





--- Comment #41 from Zhang Rui <[email protected]>  2010-06-24 01:37:21 ---
Created an attachment (id=26922)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=26922)
custom IBCM method (don't update CBLV)

please boot into the custom DSDT kernel,
then apply this custom IBCM.aml by running "cat IBCM.aml >
/sys/kernel/debug/acpi/custom_method"
then try to change the backlight and see if it helps.

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