Re: [PATCH] drm: fix regression in fb blank handling

[Dave Airlie <airlied@redhat.com>]

On Thu, 2010-01-21 at 09:09 +0800, Zhenyu Wang wrote:
> On 2010.01.20 13:14:23 +0000, James Simmons wrote:
> > 
> > It's just adding the backlight api to the intel driver. In fact it gives 
> > the user the ablity to control the brightness of the backlight which I see 
> > is lacking in the intel driver.
> 
> Wait, this regression has nothing to do with backlight control. We already
> have backlight drivers for platform specific or ACPI interface, the reason
> intel driver doesn't hook up one is because if we provide native interface
> which would be much possible to have state conflict with platform or ACPI way. 
> 
> This problem is just the wrong DPMS state is used for FB blank request.
> Dave, does my patch look sane? This regression isn't in 2.6.32, but only
> for .33-rc kernel.

We should revisit this for 2.6.34, but for now I've applied Zhenyu's
patch until we can figure out where the problems are, as it breaks a few
too many laptops at this stage for 2.6.33.

Dave.

> 



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