[Bug 406515] Re: [Karmic & Lucid Beta 1] Brightness fn keys lost functionality (Lenovo laptops)

[aquasync]

Confirmed with my Lenovo G530.

Without any changes to boot params, the brightness keys work until
gdm, (eg ok during plymouth) and also in single user mode. No acpi
events are generated though.

Using acpi=off works also (no events generated, handled by bios
I suppose), but is useless as it kills suspend, battery status
and other important things.

For me, acpi_backlight=video and =vendor both had no effect.

Trying nomodeset was successful. Plymouth looked ugly, but it
booted ok, brightness keys work and generate osd notify bubbles,
and acpi_listen shows appropriate events:

# Down
video DD03 00000087 00000000
# Up
video DD03 00000086 00000000

I'll try and build a kernel with the patch from
https://bugzilla.kernel.org/show_bug.cgi?id=15054, and see if works with
kms.

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[Karmic & Lucid Beta 1] Brightness fn keys lost functionality (Lenovo laptops)
https://bugs.launchpad.net/bugs/406515
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