http://bugzilla.kernel.org/show_bug.cgi?id=13023
--- Comment #9 from ykzhao <yakui.z...@intel.com> 2009-04-07 09:58:07 ---
Hi, Piotr
Will you please try the 2.6.28-xx kernel(for example: 2.6.28.3) and see
whether there exists the backlight interface under the /sys/class/backlight/ ?
It will be great if you can add the boot option of
"acpi.debug_layer=0x10000000 acpi.debug_level=0x01f initcall_debug" on the
2.6.28-xx kernel and attach the output of dmesg. Of course the
CONFIG_ACPI_DEBUG should be set in kernel configuration.
if there exists the backlight interface under /sys/class/backlight, please
confirm whether the backlight can be changed by using it.
Thanks.
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