http://bugzilla.kernel.org/show_bug.cgi?id=11949





------- Comment #17 from [EMAIL PROTECTED]  2008-11-11 21:45 -------
So from a text console...
/proc/acpi/video/NVID/LCD/brightness
/sys/class/backlight/acpi_video0/brightness

both work.

However, when X is in graphics mode,
both of them fail?

This sounds like ACPI is actually working,
but is prevented from working by the nvidia graphics driver.
Perhaps you can try X with a different nvidia graphics driver?


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