http://bugzilla.kernel.org/show_bug.cgi?id=13577


Zhang Rui <rui.zh...@intel.com> changed:

           What    |Removed                     |Added
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         AssignedTo|acpi_power-vi...@kernel-bug |rui.zh...@intel.com
                   |s.osdl.org                  |




--- Comment #3 from Zhang Rui <rui.zh...@intel.com>  2009-06-24 02:22:46 ---
Created an attachment (id=22071)
 --> (http://bugzilla.kernel.org/attachment.cgi?id=22071)
patch: support backlight control without _DOS

please try this patch and see if it helps.

BTW: you should be able to
1. get a warning message in the dmesg output.
2. at least one backlight sysfs I/F should be available.
3. at least one ACPI video bus device should be bind to the video driver.

please attach the
1. dmesg
2. "grep . /proc/acpi/video/*/*"
after applying the patch.

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