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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Andreas Schwab <schwab@suse.de>
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Date: Fri, 14 Jan 2005 11:15:36 +1100
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Subject: Re: Radeon blanking broken
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On Fri, 2004-12-31 at 20:43 +0100, Andreas Schwab wrote:
> The radeonfb blanking rework has broken it on the iBook G3 wit Radeon M6.
> When the X server enables DPMS the backlight stays on and the display gets
> in a strange state, gradually fading off.  When I revert the changes to
> radeon_screen_blank, radeonfb_blank and radeon_set_backlight_enable it
> works again.

This is a real pain actually... I can't seem to find a sequence that
will do proper blanking of the LCD on all models... 

It seems each LCD model need a slightly different set of timings etc...
for the blanking procedure.

Ben.