2.6.25-rc1 regression - IBM ACPI backlight

[Lukas Hejtmanek]

Hello,

as of 2.6.25-rc1, there is no more /sys/class/backlight/acpi_video1 which
controlled LVDS backlight on Lenovo ThinkPad T61. There is still acpi_video0
which seems to have sane values but echo N > brightness has no effect at all.

thinkpad_acpi module reports that ACPI controlled backlight is present.

-- 
Lukáš Hejtmánek
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