From: Andrew Morton <akpm@linux-foundation.org>
Date: Fri, 2 Mar 2007 12:29:20 -0800

On Fri, 02 Mar 2007 09:24:03 -0800
Alex Romosan [off-list ref] wrote:

quoted

Andrew Morton [off-list ref] writes:

quoted

On Wed, 28 Feb 2007 08:32:43 -0800
Alex Romosan [off-list ref] wrote:

quoted

the backlight on my thinkpad still (2.6.20 worked fine) doesn't come
on if i have the radeon backlight enabled. without it, i guess it's
the ibm acpi modules that controls the backlight and it seems to work
fine.

Unclear. Are you saying that the backlight comes on OK if you use
the IBM acpi module?

yes, if i disable the radeon backlight and use the ibm acpi module,
than the backlight works. if i enable the radeon backlight, the screen
stays dark and i can't turn it on (i tried using radeontool to control
it but nothing happened).

Richard, is this actually a bug, or is it a config error or something like that?

And should we track it as a post-2.6.20 regression?

Why don't we compromise for 2.6.21 by marking the Radeon backlight
stuff EXPERIMENTAL until the cases where IBM ACPI works and the
Radeon backlight stuff does not are worked out?

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